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Welcome to the Freedom Village Amplifier Mall.  The links and search boxes here will help you shop for the amplifer and amplifer accessories you are looking for.  You will probably find the products you are seeking just by using the resources on this page.  Thanks for coming.
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Amazon.com
You can buy amplifiers and books about amplifiers at Amazon.com. 
Buy.com
You can buy electronics, including amplifiers at Buy.com.  Use this search box to see what is available.
 
eBay
Here are a few sound amplification and related products currently available from eBay.  This RSS Feed at the bottom of this page is updated regularly, so you may want to come back.  You may also use this search box to find amplifiers on eBay's web site.
JandR.com
Audio Source, Bose, Gemini, Harmon Kardon, Marantz, Onkyo, Teac
ShoppersChoice
Electronics:  Accessories, Computers, Office Supplies, TV & Video, Cameras, Audio, Phones, Communications, Video Games
Wal-Mart
Jensen amplifiers, First Act guitar amplifiers, more.  .
 
Wal-Mart Top Ten Sellers in Electronics

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Amazon.com
Amazon.com: audiosource amplifier in Amazon.com
Onkyo M-282 2-Channel Power Amplifier 2 Channel Power Amplifier providing 100 watts of power per channel.

Electronics:  100 Watts per Channel Minimum into 8 Ohms, 2 Channels Driven, FTC, Auto power on/off, High current, low impedance drive, Preamp-level input-output loop, 12volt trigger and input level adjustment
Company: Onkyo 
List Price: $299.00
Amazon Price: Too low to display
Used Price: $234.97
Audiosource AMP310 150 Watt/450 Watt at 8 Ohm Stereo Amplifier Our company started designing and building amps over 20 years ago. During this time, we've continually refined our products to balance power, sound clarity and long-lasting performance. All of our amps - 102, 110, 210, 210SUB and 310 are full bandwidth capable, bridgeable, and feature A/B speaker switching, providing a repertiore of flexible configurations. They boast a robust power supply and bipolar out devices. With source override, our amps can accomodate necessary interuptions, such as PA systems, game consoles, phone calls or even doorbells. They're designed so users can set the master levels for volume and balance on the back of the system, then make fine adjustments on the front. All Audiosource amplifiers are easy to install and are torture tested during developments to ensure years of use. Experience you can trust, performance you can count on. The Audiosource AMP310 features 150Watts of power bridgable to 450Watts.

Electronics:  Line 2 Auxiliary Output, Front Panel Level and Balance Trim (-12dB to +6dB), Rear Panel Separate Left and Right Master Volume, Signal Sensing "Power ON", High Level Input with Line1/Line 2 Selector
Company: Audio Source 
List Price: $899.99
Amazon Price: $378.54
Audiosource AMPSUB210 200 Watt/300 Watt at 4 Ohm Subwoofer Amplifier Our company started designing and building amps over 20 years ago. During this time, we've continually refined our products to balance power, sound clarity and long-lasting performance. All of our amps - 102, 110, 210, 210SUB and 310 are full bandwidth capable, bridgeable, and feature A/B speaker switching, providing a repertiore of flexible configurations. They boast a robust power supply and bipolar out devices. With source override, our amps can accomodate necessary interuptions, such as PA systems, game consoles, phone calls or even doorbells. They're designed so users can set the master levels for volume and balance on the back of the system, then make fine adjustments on the front. All Audiosource amplifiers are easy to install and are torture tested during developments to ensure years of use. Experience you can trust, performance you can count on. The Audiosource AMP210SUB Subwoofer amp providing 200Watts at 4Ohms and 300Watts at 8Ohms.

Electronics:  Line 2 Auxiliary Output, Front Panel Level, Variable 18dB Subsonic (5-50Hz) and Variable 18dB low-pass (40-500Hz), Signal Sensing "Power ON", High Level Input with Line1/Line 2 Selector, LFE Input
Company: AudioSource 
List Price: $649.99
Amazon Price: $314.13
AudioSource Amp 200 High-Current Stereo Amplifier (80 Watts x 2) Powered Source Switching amplifier with 80 watts per channel. Ideal for for custom home audio distribution and Home Theater applications.

Electronics:  80 watts RMS x 2 (into 8 ohms); 250 watts RMS x 1 (into 8 ohms) with bridged mono use, A/B speaker selector allows multi-room amplification; uses low-distortion toroidal power supply, Signal-sensing auto-on/off and 12-volt trigger ports (in and out) for custom configuration, High- and Low-level inputs for maximum flexibility, Measures 16.5 x 3.5 x 14 inches (W x H x D)
Company: Audio Source 
List Price: $429.99
Amazon Price: $279.95
AudioSource AMP-100 2-Channel Bridgeable Stereo Power Amplifier 50 Watt Power Amplifier for multiple Custom Home Audio Distribution and Home Theater Applications. Ideal for use as a remote amplifer, A single zone amplifier, or rear channel amplifier for Dolby 6.1 / 7.1 systems.

Electronics:  2-channel 100-watt (50 watts x 2) power amplifier (provides 150 watts RMS bridged mono power), Ideal for use as a second-zone amplifier or as a rear-channel amplifier in a 6.1- and 7.1-channel system, Pair of stereo inputs with priority override; A/B speaker selector allows multi-room amplification, Signal-sensing auto-on/off switching conserves power while simplifying setup, Measures 16.5 by 2.9 by 9.25 inches (W x H x D); 2-year warranty
Company: Audio Source 
List Price: $179.99
Amazon Price: $79.00
Used Price: $67.00
AudioSource Amp 300 High-Current Stereo Amplifier (150 Watts x 2) Powered Source Switching amplifier with 150 watts per channel. Ideal for for custom home audio distribution and Home Theater applications.

Electronics:  150 watts RMS x 2 (into 8 ohms); 470 watts RMS x 1 (into 8 ohms) with bridged mono use, A/B speaker selector allows multi-room amplification; uses low-distortion toroidal power supply, Signal-sensing auto-on/off and 12-volt trigger ports (in and out) for custom configuration, High- and low-level inputs for maximum flexibility, Measures 16.5 x 5.3 x 14 inches (W x H x D)
Company: Audio Source 
List Price: $599.99
Amazon Price: $343.10
Audiosource AMP210 80 Watt/250 Watt at 8 Ohm Stereo Amplifier Our company started designing and building amps over 20 years ago. During this time, we've continually refined our products to balance power, sound clarity and long-lasting performance. All of our amps - 102, 110, 210, 210SUB and 310 are full bandwidth capable, bridgeable, and feature A/B speaker switching, providing a repertiore of flexible configurations. They boast a robust power supply and bipolar out devices. With source override, our amps can accomodate necessary interuptions, such as PA systems, game consoles, phone calls or even doorbells. They're designed so users can set the master levels for volume and balance on the back of the system, then make fine adjustments on the front. All Audiosource amplifiers are easy to install and are torture tested during developments to ensure years of use. Experience you can trust, performance you can count on. The Audiosource AMP210 features 80Watts of power bridgable to 250Watts and Variable line sensitivity at 8Ohms.

Electronics:  Line 2 Auxiliary Output, Front Panel Level and Balance Trim (-12dB to +6dB), Rear Panel Separate Left and Right Master Volume, High Level Input with Line1/Line 2 Selector, 3-15 Second Delay Time
Company: AudioSource 
List Price: $649.99
Amazon Price: Too low to display
AudioSource Amp One/A 160-Watt Stereo Power Amplifier with Internal Bridging AudioSource power amps provide high sound pressure levels, as well as subtle details, with accuracy and transparency. You won't find better sounding amps at anywhere near the price.A torodial power transformer keeps stray magnetic fields to a minimum, and the discrete output devices ensure pure signal fidelity. Separate channel level controls allow for individual adjustment. A defeatable peak limiter circuit protects speakers from distortion at high volumes, and an auto-on circuit powers up the unit with a preamp signal and powers it down when no signal is present. AudioSource amplifiers, with dedicated power supplies, have dynamic power reserves lacking in receiver combos. AudioSource separates are better able to isolate individual parts, providing a clean signal path.AMP One/A is extremely easy to set up and can be configured to function in either stereo or mono modes. One pair of speakers can be used with this amp. Its Power Output is 80 watts per channel and 200 watts monobridged. You will certainly enjoy the value and quality of your AudioSource AMP One/A for many years to come.

Electronics:  160-watt stereo amp (80 watts x 2) with switchable 200-watt mono option, Line-in jacks connect to such sources as receivers, CD players, or preamplifiers, Line-out/thru jacks for creating powerful multi-amp setup; requires preamp, 20 Hz to 20 kHz frequency response and total harmonic distortion of 0.04 percent, Measures 16.5 x 2.38 x 11.62 inches (W x H x D); 2-year warranty
Company: AudioSource 
List Price: $299.99
Amazon Price: 
AudioSource Pre One/A Stereo Preamplifier Stereo PreAmplifier for the demanding Audiophile Bass & Treble controls; Features 6 line-level inputs and 2 preamp outputs; Tape loop for outboard processors; Volume, balance, and bass and treble controls; 110 dB signal-to-noise ratio; Less than 0.008 percent THD

Electronics:  Features 6 line-level inputs and 2 preamp outputs, Tape loop for outboard processors, Volume, balance, and bass and treble controls, 110 dB signal-to-noise ratio, Less than 0.008 percent THD
Company: AudioSource 
List Price: $249.99
Amazon Price: $132.19
AudioSource Amp 5.3 250-Watt Powered Amplifier A 250 watt (4 Ohms), 150 (8 Ohms) Watt monoblock power amplifier that gives you pure hi-end sound at a great price

Electronics:  250 watts per channel stereo output, Expandable and modular to suit your changing home theater needs, Phase and low-cut controls improve sound, Toroidal power transformer provides big sound with minimal magnetic distortion, Total harmonic distortion of less than 0.10%
Company: AudioSource 
List Price: $349.95
Amazon Price: $149.79

Amazon.com: boss amplifier in Amazon.com
Boss OL5KD Class D Monoblock Amplifier with Maximum Power 5000 Watts Class D Monoblock Amplifier, Max Power 5000 Watts

Electronics:  MAX POWER, 1 OHM 5000W x 1; MAX POWER, 2 OHM 3500w x 1; RMS POWER, 4 OHM 2250w x 1, SIGNAL-TO-NOISE RATIO > 100 dB; THD 0.01%, DIMENSIONS: 11-5/16-InchW X 2-5/8-InchH X 17-1/8-InchL, Remote subwoofer level control; RCA line outputs; Gain control; Input sensitivity selector; and Variable subsonic filter, Variable low pass crossovers; 0 - +18 dB Bass Boost; Power and protection LEDs; and 0¿180º Variable phase shift control
Company: BOSS AUDIO 
List Price: $472.00
Amazon Price: $222.55
Boss D1800.5 Diablo 5-Channel Mosfet Bridgeable Power Amplifier 5-Channel MOSFET Power Amplifier, Max Power 1800 Watts

Electronics:  MAX POWER, 2 OHM 300w x 4 + 600w x 1; RMS POWER, 4 OHM 120w x 4 + 200w x 1; MAX BRIDGED POWER, 4 OHM 600w x 2 + 600w x 1, DIMENSIONS: 11-InchW x 2-5/16-InchH x 18-3/4-InchL; Trimode operation; Bridgeable; MOSFET power supply, Remote subwoofer level control; Line and speaker level inputs; Variable bass boost 0 to +18dB, Variable low pass crossover; High pass crossover (fixed), Input gain control and Power and protection LEDs
Company: Boss Audio Systems, Inc. 
List Price: $294.00
Amazon Price: $130.75
Boss Audio DD2600 Diablo Class D Monoblock Power Amplifier CLASS D MONOBLOCK POWER AMPLIFIER

Electronics:  Single class D monoblock power amplifier, Remote subwoofer level control, Sensitivity: 100 dB, Power output: 900w x 1 RMS, 2600w x 1 Max, Line and speaker level inputs
Company: BOSS AUDIO 
List Price: $249.00
Amazon Price: $116.98
Boss Audio KIT-2 Complete 8 Gauge Amplifier Installation Kit 8 Gauge Amplifier Installation Kit

Electronics:  8 gauge amplifier installation kit, Competition high-quality fuse holder, Ring terminals: #10, 0.25-inch, 0.31-inch, Twenty 4-inch wire ties, Many feet of wire and cable: red power, black ground, blue turn-on, speaker wire
Company: Boss Audio Systems 
List Price: $28.00
Amazon Price: $9.53
Boss Audio D1200M Diablo Class D Monoblock Power Amplifier MOSFET MONOBLOCK POWER AMPLIFIER WITH REMOTE SUBWOOFER LEVEL CONTROL

Electronics:  Single monoblock power amplifier, Remote subwoofer level control, Sensitivity: 105 dB, Power output: 280w x 1 RMS, 1200w x 1 Max, Line and speaker level inputs
Company: BOSS AUDIO 
List Price: $131.00
Amazon Price: $65.61
Boss Audio CX800 MOSFET Bridgeable 4-Channel Power Amplifier 4-CHANNEL MOSFET BRIDGEABLE POWER AMPLIFIER WITH REMOTE SUBWOOFER LEVEL CONTROL

Electronics:  Single 4-channel bridgeable power amplifier, Sensitivity: 102 dB, Power output: 150w x 4 RMS, 400w x 4 Max, 800w x 2 Bridged, Line and speaker level inputs, MOSFET power supply
Company: BOSS AUDIO 
List Price: $233.00
Amazon Price: $107.98
Boss CX1100M Chaos Exxtreme 1100 Watts Monoblock MOSFET Power Amplifier CHAOS EXXTREME 1100 Watts, Monoblock MOSFET Power Amplifier

Electronics:  MAX POWER, 1 OHM, N/A; MAX POWER, 2 OHM 1100w x 1; RMS POWER, 4 OHM 250w x 1; MAX BRIDGED POWER, 4 OHM N/A, SIGNAL-TO-NOISE RATIO, > 105 dB; THD, 0.01%, DIMENSIONS: 11-7/8-InchW x 2-5/8-InchH x 10-9/16-InchL, Remote subwoofer level control; Line and speaker level inputs; Variable gain control; Input sensitivity selector, Variable lowpass crossover; Power and protection LEDs; 0-+18dB selectable bass boost; MOSFET power supply
Company: Boss Audio Systems, Inc. 
List Price: $131.00
Amazon Price: $58.91
Boss DD3600 Class D Monoblock Amplifier with Maximum Power 3600 Watts Class D Monoblock Amplifier, Max Power 3600 Watts

Electronics:  MAX POWER, 1 OHM 3600w x 1; MAX POWER, 2 OHM 2400w x 1; RMS POWER, 4 OHM 1350w x 1; RMS POWER, 2 OHM 1850w x 1, FREQUENCY RESPONSE 20-1500Hz; SIGNAL-TO-NOISE RATIO > 100 dB, DIMENSIONS: 11-InchW x 2-5/16-InchH x 14-3/16-InchL, Remote subwoofer control; Line out (for system building); Variable low pass crossover (24dB/oct); Variable bass boost 0 to +18dB, Strapping capability, Strap two amps together for twice the power; Input sensitivity selector; Variable subsonic filter (24dB/oct); Phase switch; Power and protection LEDs
Company: Boss Audio Systems, Inc. 
List Price: $347.00
Amazon Price: $156.42
Boss Audio CX350 MOSFET 4-Channel Power Amplifier 4-CHANNEL POWER AMPLIFIER

Electronics:  Single 4-channel power amplifier, Sensitivity: 90 dB, Power output: 50w x 4 RMS, 100w x 4 Max, Line and speaker level inputs, MOSFET power supply
Company: BOSS AUDIO 
List Price: $87.00
Amazon Price: $41.98
Boss Audio CX600 MOSFET Bridgeable 4-Channel Power Amplifier 4-CHANNEL MOSFET BRIDGEABLE POWER AMPLIFIER WITH REMOTE SUBWOOFER LEVEL CONTROL

Electronics:  Single 4-channel bridgeable power amplifier, Sensitivity: 102 dB, Power output: 100w x 4 RMS, 200w x 4 Max, 500w x 2 Bridged, Line and speaker level inputs, MOSFET power supply
Company: BOSS AUDIO 
List Price: $180.00
Amazon Price: $81.98

Amazon.com: CE amplifier in Amazon.com
Walker Clarity Portable 25DB High-frequency Telephone Amplifier Plantronics Walker Clarity CE125 is a portable phone amplifier with Clarity Power technology designed for people who have difficulty hearing on the phone. Great for use at home, at the office or while traveling, CE125 amplifies incoming sound up to 25 dB. Clarity Power not only makes conversations louder but clearer and easier to understand. Compatible with most telephones, CE125 is quite easy to install, it connects between the base of the telephone and the receiver (dial pad must be located in the base of the telephone).

Electronics:  CLARITY Portable In-Line Amplifier for Corded Phone
Company: Plantronics 
List Price: $29.95
Amazon Price: $8.88
CE Labs AV 700 Prograde Composite A/V Distribution Amplifier The Smart Disk AV 700 7-WAY composite distributer is perfect for any home theater system. The AV 700 can be looped, cascaded, or put in tandem without loss of audio/video signals. A true one-to-one signal ratio, the AV 700 distributes signal to up to four TV's without loss.

Electronics:  Full Mosfet Power Supply, Distribution Amplifiers, Composite Video & Stereo Audio, No Signal Loss, Low Distortion
Company: California Pacific JBugs 
List Price: $105.96
Amazon Price: $60.42
CE LABS AV 400SV Prograde S-Video Distribution Amplifier These high quality audio/video amplifiers give you ability to distribute low-noise, low-distortion signals to four destinations. Amplified, broadband circuitry eliminates signal loss and assures true one-to-one ratio, low noise, low distortion, unity gain L/R audio and video distribution. The amplifiers are capable of supplying enough signal for cable runs of up to 150'. They can also be looped or cascaded for additional runs. Includes AC adapter. Operational from 12-15 VDC with a 2.5 x 5.5mm center positive DC plug.

Electronics:  Full Mosfet Power Supply, S-Video & Composite Video, Analog Left & Right Audio, No Signal Loss, Unity Gain
Company: California Pacific JBugs 
List Price: $149.95
Amazon Price: $65.54
CE LABS AV 400 Prograde Composite A/V Distribution Amplifiers (1 input ¿ 4 output) So, exactly how do you take a single audio-video device's output and connect it to more than one receiver? Most people use cheap Y-splitters and live with the darker picture and distorted audio. But with this high-quality distribution amplifier, you can split the signal without loss or degradation. Power supply included.

Electronics:  Dvd-R/Rw & Dvd+R/Rw Playback & Recording, Composite Video & Stereo Audio, No Signal Loss, Low Distortion, True 1-To-1 Ratio
Company: California Pacific JBugs 
List Price: $99.95
Amazon Price: $48.28
CE LABS AV901HD HDTV/Component A/V Distribution Amplifier The CE labs AV901HD HDTV/Component A/V Distribution Amplifier features 1 input and 9 outputs. It allows any A/V source with Y, Cb, Cr, or Y, Pb, Pr output components to distribute A/V to 5 different locations without any signal loss.It is compatible with all HDTV, digital ;and analog video signals.

Electronics:  90Deg Sweep "T" Fitting For Connection Of 3 Central Vacuum 2" Pvc Pipes, Allows Any A/V Source With Y, Cb,, Cr, Or Y, Pb, Pr Output Components To Distribute A/V To 5 Different, Locations Without Any Signal Loss, Compatible With All Hdtv, Digital & Analog Video Signals
Company: California Pacific JBugs 
List Price: $399.95
Amazon Price: Too low to display
CE LABS AV 400COMP High-Performance Component/HDTV Distribution Amplifier These high quality audio/video amplifiers give you ability to distribute low-noise, low-distortion signals to four destinations. Amplified, broadband circuitry eliminates signal loss and assures true one-to-one ratio, low noise, low distortion, unity gain L/R audio and video distribution. The amplifiers are capable of supplying enough signal for cable runs of up to 150'. They can also be looped or cascaded for additional runs. Includes AC adapter. Operational from 9-10 VAC 500mA with a 2.5 x 5.5mm center positive AC plug.

Electronics:  Dvd-Ram, Dvd-R/Rw & Dvd+R/Rw Playback & Recording, Component/Hdtv Video, (Y, Pr & Pb Or Y, Cr & Cb), Analog Left & Right Audio, No Signal Loss
Company: California Pacific JBugs 
List Price: $159.99
Amazon Price: Too low to display
CE LABS 6001 Prograde 1 GHz Bi-Directional RF Amplifier The Smart Disk 6001 allows you to experience distortion-free pictures on every TV in the house. It addition, it offers superior performance to inexpensive, store-bought RF amplifiers.

Electronics:  ¿Dvd-R/Rw & Dvd+R/Rw Playback & Recording, 1 Ghz Bandwidth Bi-Directional Amplifier, 20 Db Forward Gain With 20 Db, Adjustable Attenuator, High-Pass Filter: 54 Mhz¿1 Ghz
Company: California Pacific JBugs 
List Price: $62.98
Amazon Price: $35.49
Winegard AP-8700 U/V Pre Amplifier for Antenna Winegard Ap-8700 U/V Pre Amplifier

Electronics:  Used To Overcome Signal Loss In Coax Runs From Antenna To Tv, 75_ Input/Output, Variable Fm Trap, Made Of High-Impact Abs Material, Mast-Mounted For Easy Installation
Company: Winegard 
List Price: $63.99
Amazon Price: $35.02
CE LABS 6004 RF Drop Amplifier CE LABS 6004 RF Drop Amplifier 1 of 4 bi-directional RF drop amplifier; Coaxial powered; Can be placed anywhere; does not need to be close to a power outlet; Forward gain: +8 dB; Forward path: 541000 MHz; Reverse path: 442 MHz RF Drop Amplifier

Electronics:  Short Fitting For 90Deg Connection Of 2 Central Vacuum 2" Pvc Pipes, Coaxial Powered, Can Be Placed Anywhere; Does Not Need To Be Close To A Power Outlet, Forward Gain: +8 Db, Forward Path: 54¿1000 Mhz
Company: California Pacific JBugs 
List Price: $109.95
Amazon Price: $32.84
Motorola Signal Booster 484095-001-00 Bi-Directional RF Amplifier When using your TV or computer, there's nothing more frustrating than encountering poor reception. Now there's a fast and effortless way to make your signal strength up to 32 times more powerful! The Motorola Signal Booster enhances analog and digital picture quality, improves cable modem communication, and reduces lost data. It's easy to install and tools are not required. This device also allows you to optimize multiple broadband devices in your home - televisions, cable set-top boxes, cable modems, VCRs, and digital radios - all from one convenient cable. Clearly, the Motorola Signal Booster is a strong alternative to weak signal quality.

Electronics:  Improve signal strength by up to 32 times (15 dB), Low noise addition of only 3 dB, Superb gold patented connector design, Supports Pay-Per-View and Video on Demand (VOD) Services, Quick, easy installation
Company: Motorola 
List Price: $99.99
Amazon Price: $30.99
Used Price: $32.50

Amazon.com: JVC amplifier in Amazon.com
JVC KSAX4504 Bridgeable 4-Channel Power Vehicle Amplifier Max. Power Output of 520W. Continuous power Output: 65W RMS x 4 at 4 ohms 130W RMS x 2 at 4 ohms bridged4- 3-or 2-Channel Operation. Class-AB Circuit. PWM Regulated MOS-FET Power Supply. MOS-FET Output Stage. Frequency Response: 5 50kHz (0 -3dB). THD: less than 0.04% at 1kHz. S/N: more than 80dBA at 2Vrms. LPF (50400Hz -12dB/oct). HPF (50400Hz -12dB/oct). Subsonic Filter (20Hz). Variable RCA Input Level Control (0.3 -6V)Variable Speaker Input Control (1.2-12V). Variable Bass Boost Control (45Hz/0 -12dB). Gold-Plated RCA Jacks. Gold-Plated Block Terminals (Power/Speakers). Protection Circuitry (Thermal/Short Circuit/Overload/DC Offset). Anti-Pop Circuit. LED Indicator

Electronics: 
Company: JVC 
List Price: $199.95
Amazon Price: Too low to display
JVC KS-AX4550 - Amplifier - Shaun Palmer Signature - 4-channel - 100 Watts x 4 Shaun Palmer's SOHC line of power amplifiers offers high-level performance to indulge your senses. With variable input level and bass boost control, you decide where all your power goes. 2-ohm stable operation guarantees peak performance. The KS-AX4550 also offers temperature and overload protection to ensure that even you can't blow your system. JVC dares you to try.

Electronics:  4 CHANNEL, 520 WATTS MAX POWER, RCA/SPEAKER INPUT, BASS BOOST CONTROL, CLEARANCE ITEM SOLD AS-IS NO WARRANTY, RETURNS, CREDITS OR EXCHANGES
Company: JVC 
List Price: 
Amazon Price: $109.95
JVC HARX500 Over-the-Ear Headphones Full Size Stereo Headphone

Electronics:  Large 40mm driver, Twist-action design, Cushioned headband, Ear-direct structure, Gold-plated plug
Company: JVC 
List Price: $29.95
Amazon Price: Too low to display
JVC RX5060B Audio/Video Receiver JVC RX5060B Audio/Video Receiver

Electronics:  100 watts x 5 min. rms, into 8 ohms, 1kHz, 0.8% THD, 5.1 channel pre in/DVD multi-channel audio compatible, Dolby® Digital, DTS®, DTS® 96/24, and Dolby® Prologic II, Virtual surround back for creating even wider sound field with 5.1 channel speakers, 1 optical and 1 coaxial inputs with subwoofer pre out
Company: JVC 
List Price: $169.99
Amazon Price: 
Used Price: $129.00
JVC RXD301S 110-Watts per channel Audio / Video Control Receiver with Wireless PC Connectivity The JVC RXD301S adds JVC's new wireless USB-PC link so users of the iTunes® Music Store and other online music stores can play their files back through their component audio system using the RXD301S. It also offers a power output of 110W x 7 and a dual-mode CC converter. For analog audio, there are four inputs and two outputs, while audio digital inputs include two assignable optical inputs, one optical output and an assignable coaxial input. The video side features S-Video (three inputs, three outputs), composite (three inputs, three outputs), and component (two inputs, one output).

Electronics:  7-Channel Receiver with 110 Watts per channel, Wireless Connection with PC - enjoy playback of music files from PC, Dolby Digital EX / Dolby Digital / Dolby Pro Logic IIx / Dolby Pro Logic II, DTS / DTS-ES / NEO:6 / DTS 96/24, Multi-Brand Glow Remote Control
Company: JVC 
List Price: $439.99
Amazon Price: $416.99
Used Price: $299.50
JVC RX-D206B 7.1-Channel Home Theater Receiver with USB PC Link and Game Mode, Black JVC RXD206B Home Theater Receiver with USB PC Link and Game Mode

Electronics:  770-watt 7.1-channel home theater receiver (110 watts x 7) with hybrid feedback digital amplifier, Built-in decoding for Dolby Digital EX, DTS, DTS-ES, DTS 96/24, DTS Neo:6, and Dolby Pro Logic IIx formats, USB port connects to Mac or PC for music streaming; Game mode with RPG, sport, action, and night settings, Digital acoustics processor (DAP) simulates conditions in live venues; virtual surround back function, 3 digital audio inputs (2 optical and 1 coaxial), 2 component inputs, and 3 S-video inputs; 2-year warranty
Company: JVC 
List Price: $199.99
Amazon Price: $149.89
JVC KSAX5500 Bridgeable 4-Channel Power Vehicle Amplifier The KS-AX5500 Bridgeable 4-Channel Power Amplifier feeds your need for raw, powerful sound. Amp up your favorite music and feel every bump in the beat and every screaming guitar chord. Pick your wattage from bridgeable continuous power in 2, 3 or 4 channel mode. It's proof that bigger is often better. Short circuit protection

Electronics:  800 watt maximum, 100 watts per channel of continuous power, THD - < 1.0% @ 20Hz - 20KHz, 4, 3 or 2 channel operation, Overload protection
Company: JVC 
List Price: $219.95
Amazon Price: Too low to display
JVC HAEB70S Sport Style Ear Clips (Silver) The HA-EB70S is a perfect item that combines the joy of music and sport. With the splash proof structure and soft rubber ear hook that offers a stable and comfortable fit, you can now work out either indoors or outdoors with your own music, and without the worries of wet weather condition or sweating. It also offers a powerful bass sound and a 3.3ft length cord that you will find to be perfect for the digital music player in your pocket, wrist, or arm.

Electronics:  CATEGORY:Headsets / Microphones / Voice Recorders>Corded Headsets
Company: JVC 
List Price: $12.95
Amazon Price: Too low to display
JVC KSAX4302 Bridgeable 2-Channel Power Vehicle Amplifier Bridgable 4-Channel Power Amplifier with 600 Watts Max. Music Power * 600 Watts Max. Music Power * 100 Watts RMS x 2CH @ 4? 200W RMS x 1CH at 4? Bridged * 2 or 1-Channel Operation * Class AB Circuitry * Pulse Width Modulated Power Supply

Electronics: 
Company: JVC 
List Price: $169.95
Amazon Price: Too low to display
Used Price: $80.05
JVC KSAX5700 Bridgeable 2-Channel Power Vehicle Amplifier The JVC 2-Channel Power Amplifier feeds your need for raw, powerful sound. Amp up your favorite music and feel every bump in the beat and every screaming guitar chord. Pick your wattage from bridgeable continuous power in 2 or 1 channel mode. It's proof that bigger is often better. Short circuit protection

Electronics:  900 Watts maximum, 200 watts per channel of continuous sound, THD - < 1.0% @ 20Hz - 20KHz, 2 or 1 channel operation, Overload protection
Company: JVC 
List Price: $239.95
Amazon Price: Too low to display

Amazon.com: motorola amplifier in Amazon.com
Combo of Wilson Direct Connection Cellular PCS GSM Dual Band 824-894MHZ 1850-1990 MHz Amplifier with Magnet Mount Antenna 301103 and Adapter 352017 for Motorola L7 SLVR phone Puts the improved signal directly into your cell phone or cellular data card through a coaxial cable and adapter and gives you maximum signal performance for rural or remote locations.

Requires a physical cable connection to your phone or cellular data card
No signal loss because of the direct connection
Best performance in rural or remote locations
Can be used in buildings

The Dual-Band GSM Amplifier improves signals on both Cellular (824-894 MHz) and PCS (1850-1990 MHz) bands and works with Cingular, T-Mobile and all other GSM carriers.

:  Combo includes: direct connect dual -band vehicle amplifier 812201, magnet mount antenna 301103 and adapter 352017 for Motorola L7 SLVR phones., Improves data communication rates needed for 3G technologies, (Phone not included) Shown only for installation purposes only., Connects directly to a cell phone or cellular data card with a Wilson antenna adapter, DC power supply included - AC power supply for in -building use sold separately
Company: Wilson Electronics 
List Price: $255.99
Amazon Price: $204.99

Motorola Signal Booster 4-Port BDA-S4 Cable Modem TV HDTV Amplifier There is nothing worse than having a great TV to watch your favorite programs, while having a grainy or pixilated (digital cable) picture. Motorola BDA amplifiers give your TV signal a boost while maintaining full compatibility with all of your cable services. Simply install the BDA-S4 where your cable or antenna comes into your house and begin enjoying a better picture, faster downloads, and a more reliable HD or Digital TV signal. With a name like Motorola, how can you go wrong? The BDA-S4 is fully compatible with all cable TV standards, cable boxes, cable modems, routers, HDTV and more.

:  The BDA-S4 is a bi-directional cable TV amplifier designed for use in homes. Boosts signal by 12x., This is the 4-port commercial version of the Motorola Signal Booster 484095-001-00., A passive return path supports multiple broadband devices such as set-top boxes and cable modems., Meets all applicable IEEE surge standards for all output ports, which enhances system reliability., Weather seal and protective coating allow use of the amplifier for indoor or outdoor applications.
Company: Motorola 
List Price: 
Amazon Price: $52.90
Motorola 89015J Dc800 Bluetooth Stereo Gateway Enjoy your favorite tunes upstairs and down (up to 30 feet away from your stereo) without making a sound or missing a call. With the Motorola Bluetooth Home Stereo Adapter, you'll be wirelessly listening to your favorite tunes through your headset in no time.

Wireless Phone Accessory:  bluetooth home stereo adapter, turns audio devices such as home stereos & mp3 players into wireless music systems, plugs into home stereo or mp3 player, compatible with rca-capable tv
Company: Motorola 
List Price: $79.99
Amazon Price: $59.14
Motorola Signal Booster 2-Port BDA-S2 Cable Modem TV HDTV Amplifier There is nothing worse than having a great TV to watch your favorite programs, while having a grainy or pixilated (digital cable) picture. Motorola BDA amplifiers give your TV signal a boost while maintaining full compatibility with all of your cable services. Simply install the BDA-S2 where your cable or antenna comes into your house and begin enjoying a better picture, faster downloads, and a more reliable HD or Digital TV signal. With a name like Motorola, how can you go wrong? The BDA-S2 is fully compatible with all cable TV standards, cable boxes, cable modems, routers, HDTV and more.

:  The BDA-S2 is a bi-directional cable TV amplifier designed for use in homes. Boosts signal by 12x., This is a 2-port commercial version of the Motorola Signal Booster 484095-001-00., A passive return path supports multiple broadband devices such as set-top boxes and cable modems., Meets all applicable IEEE surge standards for all output ports, which enhances system reliability., Weather seal and protective coating allow use of the amplifier for indoor or outdoor applications.
Company: Motorola 
List Price: 
Amazon Price: $58.00
Laptop Speakers - USB, Portable, Compact, Travel Speaker for PC and Mac - B-Flex 2 Hi-Fi Stereo USB Speaker (Black) Need better sound from your laptop? The stylish new B-Flex 2 is a compact stereo speaker on a USB flex cable for laptops and desktops. Plug and play for PC and Mac with no batteries or wires! Easy to use, great for travel, mp3's, DVD's, presentations, and gaming! Features dual 1 watt digital amps and 2 full range paper cone micro drivers for crystal clear sound. The B-Flex 2 digital circuitry even works on computers without sound cards. The patented flex design allows you to position the speaker for optimum listening enjoyment. The only product of its kind, the B-Flex has been featured in the New York Times, on ABC News, on Gizmodo, and many others. WIRED magazine says the B-Flex 2 Puts laptop speakers to shame. Makes a great gift! A White unit is also available.

Electronics:  Plug and play for PC and Mac. Uses only USB power, no wires or batteries!, Easy to use. Incredibly compact and portable. Great for travel!, Produces crystal clear sound with dual 1-watt digital amps and 2 high output, full range micro drivers., Patent pending flexible design allows you to totally customize your listening experience by flexing the speaker into virtually any position., This amazing gadget was featured in the NY Times, on ABC News, in WIRED magazine, and on virtually every gadget site in the world.
Company: JLab Audio 
List Price: $69.95
Amazon Price: $39.95
Motorola Signal Booster 484095-001-00 Bi-Directional RF Amplifier When using your TV or computer, there's nothing more frustrating than encountering poor reception. Now there's a fast and effortless way to make your signal strength up to 32 times more powerful! The Motorola Signal Booster enhances analog and digital picture quality, improves cable modem communication, and reduces lost data. It's easy to install and tools are not required. This device also allows you to optimize multiple broadband devices in your home - televisions, cable set-top boxes, cable modems, VCRs, and digital radios - all from one convenient cable. Clearly, the Motorola Signal Booster is a strong alternative to weak signal quality.

Electronics:  Improve signal strength by up to 32 times (15 dB), Low noise addition of only 3 dB, Superb gold patented connector design, Supports Pay-Per-View and Video on Demand (VOD) Services, Quick, easy installation
Company: Motorola 
List Price: $99.99
Amazon Price: $30.99
Used Price: $32.50
8-Port Bi-Directional Cable TV HDTV Amplifier Splitter Signal Booster with Passive Return Path PCT's 8-Port MA2 drop amplifier has improved performance and ultra-low noise amplification of broadband signals for subscriber drop installations. The 8-Port Amplifier provides better return loss performance, enhanced shielding protection, and IEEE B3 6kV, 3000 amp combination wave surge withstand on all ports for superior lightning protection. All "F" ports also include PCT's patented Digital Seizure Mechanism (DSM) for superior center conductor retention, electrical performance, and additional protection against transient surges.

Electronics:  8 Ports with a +4dB boost per port, doubles your signal strength., Ultra small form factor for ease of installation in confined spaces, Reduces snow and prevents image pixelation with digital cable, Compatible with all standard and digital Cable TV services, 5-year warranty
Company: PCT 
List Price: $59.99
Amazon Price: $37.99
Motorola DCP501 All-In-One Home Theater Receiver Motorola is a global leader in providing integrated communications and embedded electronic solutions. Today, Motorola is harnessing the power of wireless, broadband and the Internet to deliver embedded chip system level and end-to-end network communication solutions for the individual, work team, vehicle and home.PRODUCT FEATURES:50-860 MHz Tuner, supports clear analog, 64 and 256 QAM clear and encrypted digital cable services;DigiCipher II Access Control, compatible with Motorolaenabled digital cable services in both two-way and telephone return cable systems;Supports Motorola DCT2000 digital cable applications;8 bit graphical user interface;TV Pass Card slot for upgradeable security.

Electronics:  Space saving, all-in-one system houses a DVD/CD/MP3 player, audio/video surround receiver with 100 watts x 5, and cable reception, Interactive cable receiver for analog and digital (where available) cable, Dolby Digital, DTS, and Dolby Pro Logic II 5.1-channel processing for immersive surround sound from any source, AM/FM Stereo receiver, large VF display for easy reading, NTSC decoder with digital adaptive comb filter upconverts all composite-video signals to S-video
Company: Motorola 
List Price: $899.99
Amazon Price: $223.98
Used Price: $225.00
Electroline EDA-FT08300 8-Port TV Signal Booster/Amplifier with Active Return Path (Retail Package with 10-Year Warranty) THE EDA-FT08300 8-PORT AMPLIFIER REPLACES THE EDA-FT08100, WHICH HAS BEEN DISCONTINUED BY THE MANUFACTURER. The FT08100 has been long known as the work horse of the Electroline product line for over three years, providing full compatibility with all cable TV services - bar NONE. Now Electroline has raised the bar by creating the EDA-FT08300, which provides updated functionality and full compatibility with all cable services including cable modems and the new DOCSIS 3.0 standard. If you have been looking for the perfect product to work with your home theater system, HDTV, and cable modem - then look no further. Electroline is an industry leader with innovative product designs that provide the maximum functionality and WORRY FREE operation. The EDA-FT08300 provides 8 ports for connecting up to 8 devices (including a cable modem) directly to the amplifier. This eliminates splitter loss and boosts your signal to provide the clearest, crispest picture possible. At the same time it provides full support for your cable modem (both UP and DOWN) allowing you to get the fastest downloads and uploads possible. The amplifier is surge protected (when properly grounded), has a WATERPROOF design, and is powered by the included power supply. The FT08300 can be powered from any location in the house with the use of an Electroline Power Inserter (optional - not included with the amplifier).

:  This is the ULTRA-NEW replacement for the discontinued EDA-FT08100. Now the best product is EVEN BETTER!, This is absolutely the best brand of "ultra low noise" cable TV amplifier available in the market - bar none. Boosts signal by 2x (3dB per port) while providing ZERO Return Path Insertion Loss., Amplifies your cable TV signal to dramatically reduce snow, graininess, digital pixilation and other picture problems., NOT FOR SATELLITE SYSTEMS. Fully compatible with all advanced cable TV services including Digital Cable, HDTV, and CABLE MODEMS., RETAIL PACKAGE comes with 10-year warranty. Manufacturer will not provide warranty support on non-retail product purchased from unauthorized retailers.
Company: Electroline 
List Price: $179.00
Amazon Price: $110.00
PCT 1-PORT BI-DIRECTIONAL CABLE TV HDTV AMPLIFIER SIGNAL BOOSTER WITH PASSIVE RETURN PATH PRODUCT FEATURES:Ultra small form factor for ease of installation in confined spacesLightweight powder coated and weather sealed housing for superior corrosion protectionLED power indicatorPassive return6 KV, 3KA combination wave (B3) surge withstand on all "F" portsPrecision machined SCTE compliant sealed "F" portsPatented DSM seizure technology provides better performance than 360 contacts

Electronics:  Will reduce cable break-up and static due to low signal levels, Improves cable modem performance ; Compatible with all cable systems, Slim profile: Actual size (W x H) 91 x 89 mm (3.6 x 3.5 in.), Gold-plated, berylluim copper construction deters corrosion, +15 db forward gain per port
Company: PCT 
List Price: $39.99
Amazon Price: $22.99
Used Price: $20.00

Amazon.com: onkyo amplifier in Amazon.com
Onkyo TX-SR607 7.2-Channel A/V Surround Home Theater Receiver (Black) The TX-SR607 raises the bar once again in the competitive world of mid-range home theater. With HDMI 1.3a inputs for up to six components, it’s ready to handle all your high-definition video and audio needs. Whether it’s a Blu-ray Disc player, a cable or satellite box, or a gaming console, your video signals will be traveling first class. Lower-resolution analog video signals, meanwhile, can be upscaled to 1080i and fine-tuned by Faroudja DCDi Edge™. HDMI version 1.3a also transports the master-quality HD audio formats, DTS-HD Master Audio™ and Dolby® TrueHD. The very latest Dolby technology, Dolby® Pro Logic® IIz, enhances the spatial sensation

Electronics:  90 Watts per Channel at 8 Ohms, 20 kHz, 0.08%,2 Channels Driven, FTC; 105 Watts per Channel at 8 Ohms, 1 kHz, 0.7%, 2 Channels Driven, FTC, Version 1.3a to Support Deep Color™, x.v.Color™, LipSync, Dolby TrueHD, DTS-HD Master Audio, DVD-Audio, Super Audio CD, and CEC, Audio and 1080p Video Processing via HDMI (1 Front/5 Rear Inputs and 1 Output), Deinterlacer with Faroudja DCDi Edge™ (Directional Correlational Deinterlacing) Technology, HDTV-Capable (720p/1080i) Component Video Switching (2 Inputs and 1 Output)
Company: Onkyo 
List Price: $599.00
Amazon Price: $439.50
Used Price: $429.92
Onkyo TX-8255 Stereo Receiver 50 watts x 2 (stereo) into 8 ohms (20-20,000 Hz) at 0.08% THD * 4-ohm capability allows use with a wide range of speakers * compatible with Onkyo's DS-A2x iPod dock * 6 audio inputs (including phono) * 40 AM/FM presets with station naming *

Electronics:  50W/ch x 2ch, Speaker A/B, 6 Audio inputs, including Phono input, Discrete circuit for High-current drive, iPod compatible
Company: Onkyo 
List Price: $199.00
Amazon Price: $194.00
Used Price: $172.92
AudioSource AMP-100 2-Channel Bridgeable Stereo Power Amplifier 50 Watt Power Amplifier for multiple Custom Home Audio Distribution and Home Theater Applications. Ideal for use as a remote amplifer, A single zone amplifier, or rear channel amplifier for Dolby 6.1 / 7.1 systems.

Electronics:  2-channel 100-watt (50 watts x 2) power amplifier (provides 150 watts RMS bridged mono power), Ideal for use as a second-zone amplifier or as a rear-channel amplifier in a 6.1- and 7.1-channel system, Pair of stereo inputs with priority override; A/B speaker selector allows multi-room amplification, Signal-sensing auto-on/off switching conserves power while simplifying setup, Measures 16.5 by 2.9 by 9.25 inches (W x H x D); 2-year warranty
Company: Audio Source 
List Price: $179.99
Amazon Price: $79.00
Used Price: $67.00
Onkyo TX-8522 100 Watt Stereo Receiver Onkyo 100 Watt Stereo Receiver TX8522

Electronics:  100 Watts per channel to 2-channels Stereo Power Output through 8 ohm, 20 Hz-20,000Hz, FTC, XM Ready - add an optional antenna/receiver for XM Satellite Radio playback, Oversized isolated transformer with heavy-duty extruded heat sink for maximum heat dissipation, A/B speaker selector and outputs to hook up an additional pair of speakers, 3 audio and 2 A/V inputs / 2 Audio and 1 A/V outputs
Company: Onkyo 
List Price: $349.00
Amazon Price: 
Used Price: $244.00
Onkyo M-282 2-Channel Power Amplifier 2 Channel Power Amplifier providing 100 watts of power per channel.

Electronics:  100 Watts per Channel Minimum into 8 Ohms, 2 Channels Driven, FTC, Auto power on/off, High current, low impedance drive, Preamp-level input-output loop, 12volt trigger and input level adjustment
Company: Onkyo 
List Price: $299.00
Amazon Price: Too low to display
Used Price: $234.97
Onkyo DX7555 Audiophile Single Disc CD Player Onkyo Audio Phile Single Disc CD Player DX7555

Electronics:  Plays audio CDs, MP3 CDs, CD-R/CD-RWs / Vector Linear Shaping Circuitry (VLSC) / Super precision clock. Selectable control for digital filter, Massive power transformer / Wolfson 192 kHz/24-bit DAC / Direct Digital Path / 2 digital outputs (optical/coaxial), Headphone jack with volume control / Quick navigation for MP3 CD playback / 25-step memory playback and 4 repeat modes / 4-mode dimmer, High-rigidity, anti-resonant chassis / Brushed aluminum front panel / RI (Remote Interactive) system compatible / Remote control, Frequency Response 2 Hz-20 kHz / Total Harmonic Distortion 0.0027 % / Audio Dynamic Range 100 dB / Signal-to-Noise Ratio 111 dB
Company: Onkyo 
List Price: $699.00
Amazon Price: $569.99
Used Price: $470.99
Onkyo A-9555 Integrated Digital Stereo Amplifier (Black) Onkyo Digital 85 Watt Stereo Receiver

Electronics:  Exclusive Vector Linear (VL) Digital technology /Optimum Gain Volume Circuitry / Pure Stream Power Supply / All discrete output stage circuitry, Audiophile-grade capacitor / Precision motor-driven volume control / Tone control (Bass, Treble, Loudness On/Off) / Pure direct mode, 6 audio inputs and 2 outputs / Phono input / High-rigidity, anti-resonant chassis / Aluminum volume and selector knobs / Speaker A/B posts, AMPLIFIER SECTION - Power Output 85 W/Ch (8 ohms, 0.5 %, FTC) / Dynamic Power 230 W + 230 W (3 ohms, Front) 200 W + 200 W (4 ohms, Front), Total Harmonic Distortion 0.08 % / Damping Factor 25 (Front, 1 kHz, 8 ohms) / Input Sensitivity and Impedance - Phono MM 2.5 mV/50 k-ohms
Company: Onkyo 
List Price: $799.00
Amazon Price: $579.99
Used Price: $450.00
Onkyo A-9555S Integrated Digital Stereo Amplifier (Silver) Onkyo Digital 85 Watt Stereo Receiver

Electronics: 
Company: Onkyo 
List Price: $799.00
Amazon Price: $579.99
Onkyo TX-8555 Stereo Receiver Recent years have ushered in a new era in flat-screen displays, high-definition video, and sophisticated multi-channel audio. But there's still a vital role to be played by the dedicated audio system. This streamlined two-channel receiver lets you focus solely on your music or get high-quality sound from movies, broadcasts, and gaming. The TX-8555 is packed with proprietary Onkyo amplifier technology and housed in a sturdy, vibration-resistant chassis. Whether it's channeling your iPod, SIRIUS Satellite Radio, XM Satellite Radio, CDs, or other traditional audio sources, the TX-8555 translates your music with effortless power and finesse. It even offers Zone 2 capability, so you can simultaneously play a separate audio source in a second room. The TX-8555 also has a Phono input so you can connect a stereo turntable without adding an optional pre-amp accessory. Connectivity to your iPod or to your XM satellite radio subscription requires purchase of optional accessories. Zone 2 Pre Out Subwoofer Pre Out Phono Input Massive Power Transformer Heavy-Duty Extruded Heat Sink for Maximum Heat Dissipation Speaker A/B Drive Direct Mode Pure Audio Mode IR Input/Output Independent Treble, Bass, and Balance Control XM Ready and SIRIUS Ready - requires subscription and antenna 40 FM/AM Random Presets Preset Station Naming (Up to 8 Characters) Direct Access Tuning with 10 Key Buttons Headphone Jack Audio Mute (via Remote) 3-Mode Display Dimmer (Dim/Dark/Normal) Sleep Timer (via Remote) Battery-Free Memory Back-up Non-Resonant Feet Compatible with RI Dock for the iPod Banana Plug-Compatible Speaker Posts RI (Remote Interactive) Remote Control Dimensions (W x H x D) 17 1/8 x 5 7/8 x 13 3/8 (435 x 149 x 340 mm); Weight 18.7 lbs. (8.5 kg) In the case of XM, you need to connect an XM Mini-Tunerand Home Dock (sold separately) and also subscribe to XM Satellite Radio. You can also choos

Electronics:  100W/ch x 2ch, Pure Audio mode, 4 AV inputs and 3 Audio inputs, including Phono input, Zone 2 Capability, XM/Sirius Ready
Company: Onkyo 
List Price: $299.00
Amazon Price: Too low to display
Used Price: $231.99
Onkyo TX-SR507 5.1-Channel A/V Surround Home Theater Receiver (Black) If you’re looking for a budget-friendly A/V receiver that offers versatile connectivity and compatibility with the latest processing technology, Onkyo’s TX-SR507 has you covered. With four HDMI 1.3a inputs, it can accept up to four high-definition sources—from Blu-ray Disc to HD broadcasting to high-def games—and output them to your compatible HDTV. HDMI 1.3a also enables you to enjoy the pristine “lossless” audio of Dolby® TrueHD and DTS-HD Master Audio™, as well as secondary audio on Blu-ray Disc via DTS-HD Express. The TX-SR507 comes with a suite of Audyssey surround-sound technologies to help tailor audio output to the unique dimensions of your entertainment space. Meanwhile, a new universal port makes it easy to incorporate an optional Onkyo Dock for the iPod® or Onkyo HD Radio tuner into your system. With all this, plus four high-impact Game Modes and the ability to send different audio to two rooms simultaneously, the TX-SR507 puts a huge amount of entertainment potential at your fingertips.

Electronics:  80 Watts per Channel at 8 Ohms, 20kHz, 0.08%, 2 Channels Driven, FTC; 100 Watts per Channel at 6 Ohms, 1 kHz, 0.1%, 2 Channels Driven, HDMI Audio and Video Processing (1080p; 4 Inputs and 1 Output), Audyssey 2EQ; to Correct Room Acoustic Problems, Powered Zone 2 and Zone 2 Line-Out for Playback in Another Room (Separate Source), DTS-HD Master Audio;, DTS-HD High Resolution Audio;, DTS-HD Express, Dolby TrueHD, Dolby Digital Plus Decoding
Company: Onkyo 
List Price: $399.00
Amazon Price: $314.00
Used Price: $308.92

Amazon.com: pioneer amplifier in Amazon.com
Pioneer GM-5300T 2-Channel 760-Watt Maximum Power Amplifier A really good amp doesn't just provide power. It also offers options for customizing the sound in your vehicle. The 2-channel GM-5300T provides a selectable 50Hz bass boost and a built-in crossover for fine-tuning your tunes. Plus, it comes with speaker level inputs for easy connection to an OEM headunit.

Electronics:  Peak Music Power - 760-Watts, 4 Ohm 125 Watts x 2 Output Power, 4 Ohm Bridged 380 Watts x 1 Output Power, 2 Ohm 190 Watts x 2 Output Power, 1 Watt into 4 Ohms 75 dBA Signal to Noise
Company: Pioneer 
List Price: $180.00
Amazon Price: $277.99
Pioneer GM-4300F 4-Channel 400-Watt Maximum Power Amplifier The 4-channel GM-4300F delivers a grinding 400 watts max (40 watts x 4 or 100 watts x 2 at 4 ohms; 50 watts x 4 at 2 ohms) — plenty of juice to power your high-quality speakers. It's also got built-in 4-channel crossovers. Speaker level inputs for easy connection to an OEM headunit. Oversized power terminals. And a wide input level of 400mV to 6.5V.

Electronics:  Peak Music Power - 400-Watts, 4 ohm 40-Watts x 4 Output Power, 4 ohm Bridged 100-Watts x 2 Output Power, 2 ohm 50-Watts x 4 Output Power, 80 dBA Signal to Noise 1-Watt into 4 ohms
Company: Pioneer 
List Price: $180.00
Amazon Price: $114.78
Pioneer Car GM7300M Mono Power Amplifier with 800 Watts Maximum Looking for an amplifier to drive your subwoofers? You need to get your hands on the new GM-7300M Mono Amp. It powers out 360 watts when driven at 2 ohms - drive it hard, and you can even get up to 800 watts maximum. Plus, it delivers some important features for fine-tuning your system, namely selectable 50Hz bass boost and a built-in crossover. It also comes with oversized power terminals, speaker level inputs, and a wide input level of 400mV to 6.5V.

Electronics:  mono subwoofer car amplifier, 250 watts RMS x 1 at 4 ohms (360 watts RMS x 1 at 2 ohms), variable low-pass filter (40-240 Hz), selectable bass boost (0, 6, 12 dB at 50 Hz), preamp- and speaker-level inputs
Company: Pioneer 
List Price: $200.00
Amazon Price: 
Used Price: $96.40
Pioneer GM-D8400M Mono Amplifier with 1200-Watt Maximum Power This new amplifier is designed to combine high power output and high efficiency while simultaneously producing the high-fidelity audio Pioneer is known for. The GM-D8400M digital mono amplifier, intended for powering large subwoofers, uses digital technology that makes it 80-95 percent more efficient than conventional class A/B amplifiers. Due to the increased efficiency, the physical size of the new it more compact and easier to install.

Electronics:  mono subwoofer car amplifier, 300 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms), variable low-pass filter (40-240 Hz), wired bass control (variable 0 to 12 dB boost at 50 Hz), preamp- and speaker-level inputs
Company: Pioneer 
List Price: $330.00
Amazon Price: $214.90
Pioneer GM-D7400M Mono Amplifier with 800-Watt Maximum Power This new amplifier is designed to combine high power output and high efficiency while simultaneously producing the high-fidelity audio Pioneer is known for. The GM-D7400M digital mono amplifier, intended for powering large subwoofers, uses digital technology that makes it 80-95 percent more efficient than conventional class A/B amplifiers. Due to the increased efficiency, the physical size of the new it more compact and easier to install.

Electronics:  Mono subwoofer car amplifier, 200 Watts RMS x 1 at 4 ohms (400 watts RMS x 1 at 2 ohms), Variable low-pass filter (40-240 Hz), Selectable bass boost (0, 6, 12 dB at 50 Hz), Preamp- and speaker-level inputs
Company: Pioneer 
List Price: $240.00
Amazon Price: Too low to display
Pioneer GM-3300T 2-Channel 300-Watt Maximum Power Amplifier Our newest line of subwoofers are designed to provide wider installation options for a broad range of vehicles. These ""Shallow-Mount"" Subwoofers feature multiple patent-pending features to deliver the big bass performance of a full-size subwoofer, but in a compact design that can be installed either behind or under seats depending on the type of vehicle. The mounting depth is just 3-1/4"" - less than half a typical subwoofer in this class.

This 12"" shallow subwoofer handles 1400 watts max., 350 watts nominal power, and delivers deep bass with top-notch sound quality thanks to features like Pioneer's extremely strong and lightweight IMPP Composite Double Cone Woofer.

One of the new patent-pending features is called the ""Air Suspension Control System"". This design locks in air between the main cone and drive cone, ensuring smoother and more precise movement of the cones, for superior linearity. The locked-in air behaves like a spring, so there's no need for a traditional spider structure. The drive cone also deflects air pressure inside the enclosure, which further contributes to the remarkable bass of the small package.

Electronics:  4-Ohm Power 60W x 2, 2-Ohm Power 75W x 2, Bridged 4 Ohm 150W x 1, Built-in Crossovers 80 Hz (-12 dB) LPF
Company: Pioneer 
List Price: $110.00
Amazon Price: $72.89
Used Price: $59.90
Pioneer ND-G500 4-Channel Gateway Audio Integration Amplifier for AVIC-F500BT 4-channel gateway integration amplifier.

Electronics:  4-Channel Gateway Audio Integration Amplifier, Compatible With Avic-F500Bt
Company: Pioneer 
List Price: $110.00
Amazon Price: Too low to display
Pioneer GM5400T 2-Channel Bridgeable Amplifier 2-Channel Bridgeable Amp

Electronics:  2-Channel Power Amplifier with 760 Watts Power ; Features Selectable Low-Pass Crossover, Bass Boost, Speaker Level Inputs
Company: Pioneer 
List Price: $180.00
Amazon Price: Too low to display
Pioneer PRS-D4200F - PRS Series 4-Channel Full-Range FD Car Amplifier 4-channel car amplifier * 75 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms) * 300 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode) * variable high- and low-pass filters (40-500 Hz, 12 dB per octave) *

:  4-channel car amplifier, 75 watts RMS x 4 at 4 ohms (150 watts RMS x 4 at 2 ohms), 300 watts RMS x 2 in bridged mode (4-ohm stable in bridged mode), variable high- and low-pass filters (40-500 Hz, 12 dB per octave)
Company: Pioneer Premier 
List Price: $499.99
Amazon Price: Too low to display
Pioneer GM6400F 4-Channel Bridgeable Amplifier 4-Channel Bridgeable Amp

Electronics:  4-Channel Power Amplifier with 600 Watts Max. Power, Continuous Power 60Wx4 (4¿), 75Wx4 (2¿)., Features Selectable 4-Channel Crossovers, Speaker Level Inputs.
Company: Pioneer 
List Price: $220.00
Amazon Price: Too low to display

Amazon.com: pyle amplifier in Amazon.com
Pyle Home PCA2 Mini 2 x 40-Watt Stereo Power Amplifier 2x8W 1% THD and 2x40W MAX. POWER ON/OFF switch and LED indicator; MASTER volume control; TREBLE and BASS controls; PUSH TYPE speaker output; Compatible With Any Audio/Computerize Devices; (MP3)Via 3.5mm To RCA Converter; RCA jack input; 110/220 VOLTAGE sele

Electronics:  2 x 8 W 1% THD and 2 x 40 W max, Treble and bass controls, Master volume control, 110/220 voltage selector, Push type speaker output
Company: Pyle 
List Price: $85.99
Amazon Price: $34.80
Pyle - Mini 2x75W Stereo Power Amplifier - PCA3 2x15W 1% THD and 2x75W MAX. BLUE LED output level display; POWER ON/OFF switch and LED indicator; Compatible With Any Audio/Computerize Devices; MP3)Via 3.5mm To RCA Converter; MASTER volume control; TREBLE and BASS controls; PUSH TYPE speaker output; RCA

Electronics:  2x75W MAX Power, BLUE LED output level display, POWER ON/OFF switch and LED indicator, MP3 Via 3.5mm To RCA Converter, RCA jack input
Company: Pyle 
List Price: $121.99
Amazon Price: $55.80
Pyle Home PCA1 Mini 2 x 15-Watt Stereo Power Amplifier Pyle Pro's PCA1 amplifier was designed with today's music lover in mind. The PCA1's smart, compact design fits neatly on top of a computer tower or next to your laptop to power personal audio speakers. MP3 player or iPod headphone outputs may also be used as an amplifier source with the use of a 3.5 mm stereo plug to dual RCA jack adapter. A very linear wideband frequency response means you won't miss a signal note of a song, and two-channel four-ohm stability allows you to use this amplifier with a wide range of speakers. There is no need for a separate power supply; Pyle Pro has built it into the chassis. Switchable support for both North American 120 VAC and European 230 VAC is included as well. Specifications: • Power output: 2 x 3 watts (4 ohms @ 1% THD), 2 x 4 watts (4 ohms @ 10% THD) • Frequency response: 20-40,000 Hz (±3 dB) • Signal-to-noise ratio: 75 dB • Power requirement: 120/230 VAC • Dimensions: 2.17" H x 5.62" W x 4.22" D.

Electronics:  RCA male cable inputs for direct source connection, Small form factor for portability, Speaker push-terminals for quick connections, 2 x 15W peak power output
Company: Pyle 
List Price: $72.50
Amazon Price: $22.09
PYLE PLA2200 2 Channel 1400 Watt Bridgeable Mosfet Amplifier 700 Watts x 2 Output 1400 watts x 1 idged Output Variable Hi/Lo Electronic Crossover Network Variable Input Level ( Gain ) Control Switchable Bass Boost Power And Protection LED Indicators Low Level Inputs Gold Plated RCA Inputs Outputs Slim Size Amplifier Design For Easy Installation Thermal / Overload / Short Circuit Protection Anti-Thump Turn-on Soft Turn-On Circuit Remote Turn On/Off S/N Ratio: 95db T.H.D: 0.04% Freq. Response: 15Hz - 30KHz Dimensions: 10.63-Inch H x 1.42-Inch W x 8.75-Inch L

Electronics:  2-channel vehicle amplifier with thermally stable Mosfet transistors that withstand high temperatures, 80 watts RMS x 2 into 4 ohms; 140 watts x 2 into 2 ohms; 700 watts x 2 maximum power, Built-in variable high- and low-pass crossovers; bridgeable into single 1,400-watt max output, Gold-plated RCA inputs and outputs; 15 Hz to 30 kHz frequency response; remote turn-on function, Thermal, overload, and short circuit protection; measures 10.63 x 1.42 x 8.75 inches (W x H x D); 2-year warranty
Company: Pyle 
List Price: $165.60
Amazon Price: $55.67
PYLE PLA2230 3000 Watts 2 Channel High Power Mosfet Amplifier 1500 Watts x 2 Output 3000 Watts x 1 idged Output Variable Hi/Lo Electronic Crossover Network Variable Input Level (Gain) Control Variable Bass Boost Sub Sonic Filter Thermal / Overload / Short Circuit Protection MOSFET PWM Power Supply Power And Protection LED Indicators Low Level Inputs Gold Plated RCA Inputs And Outputs Slim Size Amplifier Design For Easy Installation Dimensions: 10.63'W x1.42'H x 17'L

Electronics:  1500 Watts x 2 Output, 3000 Watts x 1 Bridged Output, Variable hi/lo electronic crossover network, Variable input level (gain) control ; Variable bass boost, Thermal, overload, and short circuit protection, Slim size design for easy installation ; Dimensions: 10.63'W x1.42'H x 17'L
Company: Pyle 
List Price: $274.95
Amazon Price: $103.18
Pyle PLA2210 1800W 2-Channel Chopper Amplifiers 900 Watts x 2 Output 1800 watts x 1 idged Output Variable Hi/Lo Electronic Crossover Network Variable Input Level ( Gain ) Control Switchable Bass Boost Power And Protection LED Indicators Low Level Inputs Gold Plated RCA Inputs Outputs Slim Size Amplifier Design For Easy Installation Thermal / Overload / Short Circuit Protection Anti-Thump Turn-on Soft Turn-On Circuit Remote Turn On/Off S/N Ratio: 95db T.H.D: 0.04% Freq. Response: 15Hz - 30KHz Dimensions: 10.63-Inch H x 1.42-Inch W x 12-Inch L

Electronics:  2 x 900W MAX at 4 ohms, 1800W max at 4 ohms bridged, Dual switchable bass boost, Dual variable electronic crossover network
Company: Pyle 
List Price: $204.00
Amazon Price: $65.64
Pyle PPA450 4500W Rack Mount Amplifier 4500-Watt Rack-Mount Amplifier PPA450

Electronics:  Dual RCA and combo inputs, Dual output level controls and illumination, Stereo or bridged power into 4 or 8 ohms with stereo/mono switch, 19" rack
Company: Pyle 
List Price: $437.95
Amazon Price: $162.79
Pyle PTA2 Mini 2x40W Stereo Power Amplifier Electronics:  2X40W 10% RMS At 4-Ohm, Power On Led Indicator, Music Volume Control, Head Phones Output Jack, 1/4' Mic Input Jack
Company: Pyle 
List Price: $130.00
Amazon Price: $46.24
PYLE PLAD413 4 Channel 2000 Watt Bridgeable Mosfet Amplifier 4 x 200W RMS @ 4 Ohms 4 x 500W MAX @ 4 Ohms 2 x 800W MAX @ 4 Ohms idged 4 x 350W RMS @ 2 Ohms Electronic Crossover Network Bass Boost Circuit idgeable at 4 Ohms 2 Ohm Stereo Stable Tri-Mode Capable Gold Plated RCA Inputs Line Outs for 1 and 2 Channel Low Pass Filter Control High Pass Filter Control Remote Bass Level Control (Included) Power and Protection LED Indicators Red Lighting Illumination Side Leg Mounting THD: 90dB Input Sensitivity : 100mV ~4V Channel Separation : >65dB Freq. Response : 10Hz ~ 30KHz Patent Pending Soft Turn-on/Turn-off Dimensions : 8.6-Inch(W) x 2.27-Inch(H) x 12.6-Inch(L)

Electronics:  4 x 200W rms at 4 ohms, 4 x 500W max at 4 ohms, 2 x 800W max at 4 ohms bridged, 4 x 350W rms at 2 ohms, Remote bass level control
Company: Pyle 
List Price: $251.37
Amazon Price: $105.37
Pyle Home PTA3 Mini 2 x 75-Watt Stereo Power Amplifier 2x15W 1% THD and 2x75W MAX. BLUE LED output level display; POWER ON/OFF switch and LED indicator; AUX1/AUX2/CD input and selector; PHONES output; MIC 1/4'' jack input and volume control; MASTER volume control; BALANCE control; PAGER-MIXING selector; BASS/

Electronics:  BLUE LED output level display, POWER ON/OFF switch and LED indicator, MIC 1/4" jack input and volume control, Master volume control
Company: Pyle 
List Price: $153.99
Amazon Price: $66.28

Amazon.com: sony amplifier in Amazon.com
Sony XMGTR2022 2/1 Channel GTR Series Amplifier Add more power you your car audio system with the XM-GTR2022 GTR Series amplifier. This easy-to-install amp features High Level Sensing power on inputs so you don't need to run a separate turn-on lead. You can also put this 2/1 channel amp in more places thanks to its slim profile, removable terminal cover and inverted heat-sink design. Additionally, the clear acrylic panel with blue LED lighting shows off the larger capacitors and improved MOSFET devices.

Electronics:  600W x 2 Max Power Output, 202W x 2 into 4 ohms, 20Hz-20kHz, 1.0% THD, Variable 50-300Hz Lo-Pass Filter, -12dB/oct Selectable Slope, 250W x 2 into 2 ohms, 20Hz-20kHz, 1.0% THD
Company: Sony 
List Price: $199.95
Amazon Price: Too low to display
Sony XMZR1252 2/1 Channel ZR Series Amplifier Rock your road trip with Xplod ZR Series amplifier. The XM-ZR1252 puts out 125 watts RMS per channel to a pair of speakers (not included) or can be used as a bridging amplifier with a maximum output of 800W at 4 ohms. Additional features include variable crossovers, multiple channel configurations and single-side electrical connections. 800W x 1 max power at 4 Ohms, can be used as a bridging amplifier with a maximum output of 800W at 4 Ohms High Level Input with Sensing Power On, direct connection (High Level Input) can be made with the speaker output of your car audio unit if it is not equipped with RCA line output; Hi-Level Sensing power On feature allows the unit to be activated without need for remote connection Selectable HPF and LPF - built in selectable 12 dB/Oct 80Hz HPF and LPF Bass Boost - variable 0-10 dB 40Hz bass boost provides additional bass response at lower frequencies Accessories Supplied - Mounting Screws (4) High Level Input Cord (1) Protection Cap (1) Unit Dimensions - 15 5/8 W x 2 1/4 H x 10 1/8 D; Weight - 6 lbs. 10 oz.

Electronics:  125W x 2 RMS (20Hz-20kHz,
Sony STR-DH100 2-Channel Audio Receiver (Black) The STR-DH100 delivers clear, dynamic stereo sound for every day music fans and rooms where a complex home theater system is not needed. The STR-DH100 transforms any secondary living environment into a concert hall. In addition, the STR-DH100 features Sony's digital media port input that allows you to extend your music selection from an iPod, Walkman digital player, Bluetooth device or from a PC (accessories sold separately).

Electronics:  2-channel audio receiver, 100 watts per channel, 5 audio inputs/2 audio outputs, a and b speaker switching for front speakers, 1/4-inch headphone jack output
Company: Sony 
List Price: $149.99
Amazon Price: Too low to display
Used Price: $128.99
Sony Xplod 2-Channel 1000 Watt Amplifier With a 1000 Watts of power and clean, top-quality transmission, consider this amp an open invitation to crank the volume without fear of distortion. In Graphite Gray. MOSFET Power Supply Balanced Input Circuit Speaker Level Input 2-Channels 1000 Watts Gold Plated Connectors Graphite Gray

:  With a 1000 Watts of power and clean, top-quality transmission, consider this amp an open invitation to crank the volume
Company: Sony 
List Price: 
Amazon Price: 
Sony XM-1252GTR - Amplifier - Xplod - 2-channel - 280 Watts x 2 Sony's Xplod amps combine form and function in a mix that'll make your system look and sound great. On the outside, the sleek inverted heat sink keeps vital internal components running cooler and lasting longer. Removable terminal covers keep all the wire connections protected and out of sight for a clean-looking installation.Underneath the hood, the 2-channel XM-1252GTR delivers 125 watts to two channels, or 340 watts in single-channel operation- plenty of power for many subwoofer systems. Signal-sensing speaker-level inputs activate the amp automatically when you turn on your factory radio, so there's no remote turn-on lead for you to install.Built-in frequency filters tailor the your application, while a bass boost adds extra punch to the lows.

Electronics:  125 Watts RMS X 2 At 4 Ohms (170 Watts RMS X 2 At 2 Ohms), 340 Watts RMS X 1 At 4 Ohms (4-ohm Stable In Bridged Mode), Low- And High-pass Filters (80 Hz, 12 DB/octave), Speaker-level Inputs With Signal Sensing For Automatic Turn-on
Company: Sony 
List Price: $149.00
Amazon Price: 
Used Price: $75.00
Sony STRDG820 7.1 Audio Video Receiver - Black The STR-DG820 7.1 Ch. A/V Receiver delivers the Full HD 1080 experience to a home theater system. This new 1080p A/V Receiver features HDMI with ¿Active Intelligence¿, plus x.v.Color and 1080/24p signal capability. In addition to decoding uncompressed audio (LPCM via HDMI), the STR-DG820 decodes the latest audio formats from Dolby Labs and DTS making this model fully compatible with Blu-ray Disc. Now, you can hear the original mix of your favorite BD titles regardless of audio format. Need more HDMI inputs? The STR-DG820 features four HDMI inputs that allows for more HD content to be connected. Looking for simplicity? BRAVIA Sync provides a one button operation (via HDMI) of your entire A/V experience with a select number of BRAVIA televisions. Because no room is perfect, Sony¿s Digital Cinema Auto Calibration (and its supplied microphone) simplifies speaker set up and optimizes speaker performance with the push of one button in just 30 seconds. This full featured A/V Receiver expands its ability to playback music from various audio sources (i.e. iPod, Walkman, PC, etc¿) with the DIGITAL MEDIA PORT and one of the various accessories (sold separately). Would you like to listen to satellite radio? The XM Connect-and-Play Ready feature provides the ability to access XM satellite radio programming in surround sound.

Electronics:  7.1 Channel Audio/Video Receiver, 100 Watts X 7 Amplifier Power (8 ohms, 1Khz, 1.0% THD), Accepts 1080/60p and 24p video signal via HDMI, HDMI Active Intelligence: 4 in/1 out(Video and Audio), Optimized for Blu-ray Disc and other HD Sources
Company: Sony 
List Price: $499.99
Amazon Price: $499.99
Used Price: $295.00
Sony XM4S Slim Line 4/3 Channel Amplifier 4-channel car amplifier * 50 watts RMS x 4 at 4 ohms (60 watts RMS x 4 at 2 ohms) * 50 x 2 watts RMS + 120 x 1 watts RMS power bridged output at 4-ohms (4-ohm stable in bridged mode) * switchable high-pass filter on front two channels (80 Hz, -12 dB/octave) * switchable low-pass filter on rear two channels (80 Hz, -18dB/octave) * variable bass boost on rear two channels (0-10 dB at 40 Hz) * speaker-level inputs with high-level sensing turn-on *

Electronics:  4-channel car amplifier, 50 watts RMS x 4 at 4 ohms (60 watts RMS x 4 at 2 ohms), 50 x 2 watts RMS + 120 x 1 watts RMS power bridged output at 4-ohms (4-ohm stable in bridged mode), switchable high-pass filter on front two channels (80 Hz, -12 dB/octave), switchable low-pass filter on rear two channels (80 Hz, -18dB/octave)
Company: Sony 
List Price: $199.95
Amazon Price: Too low to display
Sony STR-DG520 5.1 Audio Video Receiver - Black The STR-DG520 5.1 Ch. A/V Receiver delivers the Full HD 1080 experience to your Home Theater System. This new 1080p A/V Receiver features HDMI ¿Pass-through¿ and 1080/24p capability thus making it compatible with the latest HD sources1(i.e. Blu-ray Disc Players, the PlayStation 3, etc¿). Because no room is perfect, Sony¿s Digital Cinema Auto Calibration (and its supplied microphone) simplifies speaker set up and optimizes speaker performance with the push of one button in just 30 seconds. The STR-DG520 features a DIGITAL MEDIA PORT connection. This proprietary connection expands the flexibility of the STR-DG520 to playback music from various audio sources (i.e. iPod, Walkman or PC) with one of the various accessories (sold separately).

Electronics:  5.1 Channel Audio/Video Receiver, 100 Watts X 5 Power (8 ohms, 20Hz-20kHz,.09% THD), 1080p HDMI Pass Through (2 In / 1 Out), Accepts 1080/60p and 24p video signal via HDMI, Digital Media Port
Company: Sony 
List Price: $299.99
Amazon Price: Too low to display
Used Price: $159.50
Sony STRDG720 7.1 Audio Video Receiver - Black The STR-DG720 7.1 Ch. A/V Receiver delivers the Full HD 1080 experience to a home theater system. This new 1080p A/V Receiver features HDMI with ¿Active Intelligence¿ and 1080/24p signal capability thus making it compatible with Blu-ray Disc Disc, the PlayStation 3 and other HD sources. Need more HDMI inputs¿ The STR-DG720 features three HDMI inputs that allow the desire for more HD content to grow. Speaking of an enhanced experience, the STR-DG720 decodes uncompressed audio (LPCM via HDMI) so you can hear the original mix of your favorite BD titles. Looking for simplicity¿ BRAVIA Sync provides a one button operation (via HDMI) of your entire A/V experience with a select number of BRAVIA televisions. Because no room is perfect, Sony¿s Digital Cinema Auto Calibration (and its supplied microphone) simplifies speaker set up and optimizes speaker performance with the push of one button in just 30 seconds. Do you want to connect your iPod or Walkman¿ Would like to listen satellite radio¿ Well, the STR-DG720 features a DIGITAL MEDIA PORT connection which expands its flexibility to playback music from various audio sources (i.e. iPod, Walkman, PC, etc?) with one of the various accessories (sold separately) whereas the XM Connect-and-Play Ready feature provides the ability to access XM satellite radio programming in surround sound.

Electronics:  7.1 Channel Audio/Video Receiver, 105 Watts X 7 Amplifier Power (8 ohms, 1Khz, 1.0% THD), Accepts 1080/60p and 24p video signal via HDMI, 1080p HDMI w/ Active Intelligence (3in/1out), BRAVIA Sync (HDMI CEC)
Company: Sony 
List Price: $399.99
Amazon Price: 
Used Price: $229.72
Sony XM-D9001GTR - Amplifier - Xplod - 1-channel - 900 Watts x 1 Sony's Xplod amps combine form and function in a mix that'll make your system look and sound great. On the outside, the sleek inverted heat sink keeps vital internal components running cooler and lasting longer. Removable terminal covers keep all the wire connections protected and out of sight for a clean-looking installation.Underneath the hood, the XM-D9001GTR mono amplifier delivers 550 watts to a single 4-ohm sub, or 900 watts to a pair of subs - plenty of power for even the most demanding subwoofers. Signal-sensing speaker-level inputs activate the amp automatically when it's connected to a factory radio, so there's no remote turn-on lead for you to install.You can adjust the frequency filter to tailor the signal going to your subs, while a bass boost adds extra punch to the lows.

Electronics:  550 Watts RMS X 1 At 4 Ohms (900 Watts RMS X 1 At 2 Ohms), Low-pass Crossover (50-300 Hz, 12 DB/octave), MOSFET Outputs And Power Supply, Variable Bass Boost (0-10 DB At 40 Hz)
Company: Sony 
List Price: 
Amazon Price: $159.99
Used Price: $100.00

Amazon.com: TEAC amplifier in Amazon.com
TEAC AG-790A Stereo Receiver Teac AG-790A Stereo Receiver Component - This is designed to be the central component of a home stereo sound system and requires speakers or headphones (not included). Banana speaker terminals for a more secure and easy connection Capability of attaching up to 2 pairs of speakers which may be controlled with a speaker selector switch Front-mount jack for optional stereo headphones Loudness function permits full tonality at low listening levels to provide consistently high-quality sound to suit any listening situation Phono Input Includes wireless remote control Unit Dimensions - 17 1/8 x 5 1/8 x 12 1/4

Electronics:  Product packaging includes - AG-790A receiver, remote control, user's manual., Delivers 100 watts per channel audio power for distinctly clear stereo sound, Digital FL display shows radio station numbers, selected input and clock / timer, Built-in digital AM and FM radio allows you to select up to 30 stations for quick access using a built-in memory programming mode, Sleep timer
Company: TEAC America, Inc. 
List Price: $189.38
Amazon Price: $121.00
Laptop Speakers - USB, Portable, Compact, Travel Speaker for PC and Mac - B-Flex 2 Hi-Fi Stereo USB Speaker (White) The stylish B-Flex is a compact stereo speaker with a USB flex cable. Easy to use, great for enjoying mp3's and DVD's, perfect for laptops and desktops!

Electronics:  Plug and play for PC and Mac. Uses only USB power, no wires or batteries!, Easy to use. Incredibly compact and portable. Great for travel!, Produces crystal clear sound with dual 1-watt digital amps and 2 high output, full range micro drivers., Patent pending flexible design allows you to totally customize your listening experience by flexing the speaker into virtually any position., This amazing gadget was featured in the NY Times, on ABC News, in WIRED magazine, and on virtually every gadget site in the world.
Company: JLab Audio 
List Price: $69.95
Amazon Price: $39.95
Teac AG-790 AM/FM Stereo Receiver Around the world, the TEAC name is synonymous with high-quality, high performance consumer gear - not surprising when you consider that TEAC has been a leader in the industry since its earliest reel-to-reel recorders. Today, TEAC manufactures an entire spectrum of components for both high-fidelity audio systems and digitally enhanced home theaters. For many audiophiles, the TEAC label is a symbol of pride, one that shows they are serious about audio quality. Industry experts share this enthusiasm for TEAC products, giving them consistently high marks for performance.PRODUCT FEATURES:5-input selector: tuner, CD, tape, phono, AUX;Quartz PLL synthesized tuning system;Multi-function fluorescent display;Front panel headphone output Bass, treble, balance controls;90-minute sleep timer;30 FM/AM station presets;Remote control.

Electronics:  200-watt stereo receiver (100 watts x 2) driven into 8 ohms, Discrete circuit configuration separates audio signals for clarity, PLL-synthesized AM/FM tuner with 60 total presets (30 FM and 30 AM), A/B speaker selection; binding post speaker terminals, Measures 17.12 by 5.47 by 13.19 inches (W x H x D); includes remote control
Company: TEAC 
List Price: $199.99
Amazon Price: $105.00
TEAC AGH300mkIII AM/FM Stereo Receiver This classy black stereo receiver delivers 2 x 35 watts of power. Enough power to drive almost any speaker you might choose. Heavy duty speaker binding post type terminals and a headphone jack on the front panel are just two of the features taken from Teac¿s full-size components range.

Electronics:  Motor Driven Remote Control, Phono Input, AM 30, FM 30 Preset Station Memory, PLL Synthesized AM/FM Tuner, 35 Watts x 2
Company: Teac 
List Price: $399.00
Amazon Price: Too low to display
Laptop Speakers - USB, Portable, Compact, Travel Speaker for PC and Mac - B-Flex 2 Hi-Fi Stereo USB Speaker (Black) Need better sound from your laptop? The stylish new B-Flex 2 is a compact stereo speaker on a USB flex cable for laptops and desktops. Plug and play for PC and Mac with no batteries or wires! Easy to use, great for travel, mp3's, DVD's, presentations, and gaming! Features dual 1 watt digital amps and 2 full range paper cone micro drivers for crystal clear sound. The B-Flex 2 digital circuitry even works on computers without sound cards. The patented flex design allows you to position the speaker for optimum listening enjoyment. The only product of its kind, the B-Flex has been featured in the New York Times, on ABC News, on Gizmodo, and many others. WIRED magazine says the B-Flex 2 Puts laptop speakers to shame. Makes a great gift! A White unit is also available.

Electronics:  Plug and play for PC and Mac. Uses only USB power, no wires or batteries!, Easy to use. Incredibly compact and portable. Great for travel!, Produces crystal clear sound with dual 1-watt digital amps and 2 high output, full range micro drivers., Patent pending flexible design allows you to totally customize your listening experience by flexing the speaker into virtually any position., This amazing gadget was featured in the NY Times, on ABC News, in WIRED magazine, and on virtually every gadget site in the world.
Company: JLab Audio 
List Price: $69.95
Amazon Price: $39.95
Teac TR-670 AM/FM Stereo Tuner with Remote Up to 30 FM and 30 AM Programmable Station Memories / Digital Tuning / Multifunction Screen / Clock and Timer / Remote Control

Electronics:  Quartz PLL-synthesized digital AM/FM tuner with direct access tuning, Manual or auto tuning for the 60 memory presets (30 FM and 30 AM), Digital clock with 90-minute sleep timer in 10-minute increments, Multifunction fluorescent display; includes remote control, Measures 17.13 by 3.46 by 11.3 inches (W x H x D) and weighs 8.38 pounds
Company: TEAC 
List Price: $299.99
Amazon Price: $129.99
TEAC DR-H300 DVD Receiver Whatever format source your favorite music is on ¿ CD or DVD, hybrid CD, MP3 files on a memory stick or even a FM broadcast, this mini component is able to deliver it to you. Not only that, HDMI interface delivers digital quality picture to your digital television via a smart connection. Your digital TV will maximize its picture performance and a troidal core power transformer delivers stable and clean power to every single component of the unit, delivering first-class sound quality.

Electronics:  Plays DVD-Video, DVD+R/+RW, VCD, SVCD, CD, CD-R/RW, MP3 CD, WMA CD, JPEG CD, DivX discs, AM/FM tuner with up to 30 presets, Progressive scan compatible using HDMI Out Component video out, S-video out, HDMI, Composite video out
Company: Teac 
List Price: $449.00
Amazon Price: $399.00
Select the category "electronics," or the category "books" in the search box and enter the key word, "amplifier."  Some examples of products are shown below.

eBay
amplifier (Category: Electronics )
Liberty Cable XGA Line Amplifier
Sat, 27 Jun 2009 00:52:40 PDT
US $245.99
End Date: Friday Jul-03-2009 18:52:37 PDT
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PLANET AUDIO VX6005 700watt RMS 5 CHANNEL CAR AMPLIFIER
Thu, 04 Jun 2009 01:19:47 PDT
US $137.95
End Date: Saturday Jul-04-2009 1:19:47 PDT
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Boss 4-Channel MOSFET Bridgeable Marine Power Amplifier
Thu, 05 Mar 2009 19:48:21 PST
US $211.98
End Date: Friday Jul-03-2009 20:53:21 PDT
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20PAIR,Loudspeaker Tube Amplifier Gold BINDING POSTS,G
Fri, 26 Jun 2009 18:23:57 PDT
US $123.00 (0 Bid)
End Date: Friday Jul-03-2009 18:23:57 PDT
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AudioSource 250-Watt Monoblock Power Amplifier - 1 X 15
Thu, 05 Mar 2009 19:47:45 PST
US $349.99
End Date: Friday Jul-03-2009 20:52:45 PDT
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NEW CROWN XLS-602D 1680 WATT POWER AMP DJ AMPLIFIER 602
Thu, 04 Jun 2009 01:17:29 PDT
US $499.00
End Date: Saturday Jul-04-2009 1:17:29 PDT
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Amplifier PYLE #PLA2260 4000-WATT 2 CHANNEL CHOPPER SR.
Fri, 26 Jun 2009 20:12:32 PDT
US $166.57
End Date: Friday Jul-03-2009 20:12:32 PDT
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JL Audio HD Series HD750/1 Mono Power Amplifier *NEW*
Wed, 03 Jun 2009 20:24:23 PDT
US $459.00
End Date: Friday Jul-03-2009 20:29:23 PDT
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NEW HIFONICS ZXI4408 4 CHANNEL AMPLIFIER ZXI-4408 AMP
Wed, 03 Jun 2009 20:17:47 PDT
US $158.95
End Date: Friday Jul-03-2009 20:17:47 PDT
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Marantz SR6003 Home Cinema Receiver Amplifier SR-6003
Sat, 27 Jun 2009 01:06:41 PDT
US $953.68
End Date: Saturday Jul-04-2009 1:06:41 PDT
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PYLE-PRO PZR10XA 3300-Watt Power Amplifier RACK AMP NEW
Fri, 26 Jun 2009 19:00:33 PDT
US $177.95
End Date: Friday Jul-03-2009 19:00:33 PDT
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NEW Boss DD3600 Car Amplifier
Thu, 04 Jun 2009 02:32:01 PDT
US $196.67
End Date: Friday Jul-03-2009 20:36:59 PDT
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KICKER 08ZX700.5 5 CHANNEL CAR AUDIO AMPLIFIER ZX700.5
Sat, 04 Apr 2009 21:09:13 PDT
US $314.10
End Date: Friday Jul-03-2009 21:14:13 PDT
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MCINTOSH MC-225 audio power amplifier, circa 1963
Fri, 26 Jun 2009 19:33:19 PDT
US $1,888.88 (0 Bid)
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EV AP2600A Power Amplifier
Fri, 26 Jun 2009 18:29:18 PDT
US $50.00 (1 Bid)
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Harman/kardon AVR 135 Home Theater Reciever Amplifier!!
Fri, 26 Jun 2009 21:27:45 PDT
US $185.00
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Liberty Cable 1:2 S-Video Distribution Amplifier
Sat, 27 Jun 2009 01:15:23 PDT
US $104.99
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300W Power Amplifier Stereo Two Channel Dual Source MI6
Thu, 05 Mar 2009 16:48:38 PST
US $375.00
End Date: Friday Jul-03-2009 17:53:38 PDT
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NEW 2008 KENWOOD 1800w MONO CAR AUDIO AMPLIFIER SUB AMP
Wed, 03 Jun 2009 21:58:04 PDT
US $184.80
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NEW LANZAR 2 CHAN 2000W CAR AMP AMPLIFIER W/ 3 YR WARTY
Fri, 26 Jun 2009 19:12:00 PDT
US $126.95 (0 Bid)
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NEW! 4000 WATT LANZAR VIBE286 Car Audio Amp/Amplifier
Wed, 03 Jun 2009 20:04:35 PDT
US $153.00
End Date: Friday Jul-03-2009 20:09:35 PDT
Buy It Now for only: US $153.00
Buy it now | Add to watch list
QUANTUM AUDIO MONO CAR STEREO AMPLIFIER 3000W BASS AMP
Fri, 26 Jun 2009 22:29:33 PDT
US $169.00
End Date: Friday Jul-03-2009 22:29:33 PDT
Buy It Now for only: US $169.00
Buy it now | Add to watch list
Quicksilver Horn Tube Power Amplifiers-Mono Blocks MINT
Fri, 26 Jun 2009 19:00:00 PDT
US $1,200.00
End Date: Friday Jul-03-2009 19:00:00 PDT
Buy It Now for only: US $1,200.00
Buy it now | Add to watch list
Liberty Cable S-Video Distribution Amplifier/Converter
Sat, 27 Jun 2009 00:58:07 PDT
US $187.99
End Date: Friday Jul-03-2009 18:58:05 PDT
Buy It Now for only: US $187.99
Buy it now | Add to watch list
NEW POWER ACOUSTIK BAMF1800/2 1800 WATT 2 CH AMPLIFIER
Thu, 04 Jun 2009 01:17:11 PDT
US $154.95
End Date: Saturday Jul-04-2009 1:17:11 PDT
Buy It Now for only: US $154.95
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LEGACY STEEL 4200 WATT 2CHANNEL CAR AMPLIFIER 4200W AMP
Tue, 23 Jun 2009 19:32:39 PDT
US $179.95
End Date: Friday Jul-03-2009 19:32:39 PDT
Buy It Now for only: US $179.95
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NEW MACKIE FR-1400 1400w 2c POWER AMP AMPLIFIER FR1400
Sat, 04 Apr 2009 18:53:35 PDT
US $399.99
End Date: Friday Jul-03-2009 18:58:35 PDT
Buy It Now for only: US $399.99
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Liberty Cable 1:3 Video Line Amplifier
Sat, 27 Jun 2009 00:52:50 PDT
US $326.99
End Date: Friday Jul-03-2009 18:52:43 PDT
Buy It Now for only: US $326.99
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JL AUDIO A4300 4 CHANNEL AMPLIFIER CLASS A/B CAR AMP
Tue, 23 Jun 2009 18:51:15 PDT
US $214.15
End Date: Friday Jul-03-2009 18:51:15 PDT
Buy It Now for only: US $214.15
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PYRAMID 4-CHANNEL 2000 WATT CAR AMPLIFIER 2000w 4CH AMP
Tue, 23 Jun 2009 19:24:02 PDT
US $109.95
End Date: Friday Jul-03-2009 19:24:02 PDT
Buy It Now for only: US $109.95
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NEW JL AUDIO 450/4 SLASH 4 CHANNEL CAR AMPLIFIER AMP
Thu, 04 Jun 2009 01:19:30 PDT
US $399.00
End Date: Saturday Jul-04-2009 1:19:30 PDT
Buy It Now for only: US $399.00
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Amplifier PYLE #PLA4120 1000-WATT 4 CHANNEL CHOPPER SR.
Fri, 26 Jun 2009 20:12:30 PDT
US $112.57
End Date: Friday Jul-03-2009 20:12:30 PDT
Buy It Now for only: US $112.57
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PARASOUND HCA-1500A AMPLIFIER
Sun, 28 Jun 2009 18:31:19 PDT
US $550.00
End Date: Friday Jul-03-2009 18:31:19 PDT
Buy It Now for only: US $550.00
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Harman Kardon Citation 22 Amplifier Rare Buy Now
Fri, 05 Dec 2008 18:51:00 PST
US $599.00
End Date: Friday Jul-03-2009 19:56:00 PDT
Buy It Now for only: US $599.00
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POWER ACOUSTIK SL2-1500 AMPLIFIER 1500W CAR AUDIO NEW
Sat, 04 Apr 2009 23:26:06 PDT
US $149.99
End Date: Friday Jul-03-2009 23:31:06 PDT
Buy It Now for only: US $149.99
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NEW ORION HCCA-D600 CLASS D MONOBLOCK AMPLIFIER CAR AMP
Tue, 03 Feb 2009 22:03:48 PST
US $134.99
End Date: Friday Jul-03-2009 23:08:48 PDT
Buy It Now for only: US $134.99
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JL AUDIO HD Series HD600/4 4Channel Power Amplifier NEW
Wed, 03 Jun 2009 20:18:18 PDT
US $509.00
End Date: Friday Jul-03-2009 20:18:18 PDT
Buy It Now for only: US $509.00
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Vintage Realistic STA 84 Stereo Amplifier and Receiver
Wed, 03 Jun 2009 20:06:46 PDT
US $149.99
End Date: Friday Jul-03-2009 20:06:46 PDT
Buy It Now for only: US $149.99
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Denon AVR-2308 Home Cinema Receiver Amplifier AVR2308
Sat, 27 Jun 2009 00:51:12 PDT
US $754.83
End Date: Saturday Jul-04-2009 0:51:12 PDT
Buy It Now for only: US $754.83
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NEW O2 OXYGEN AUDIO 2200 WATT MONO CAR AMPLIFIER AMP
Thu, 04 Jun 2009 01:21:58 PDT
US $264.95
End Date: Saturday Jul-04-2009 1:21:58 PDT
Buy It Now for only: US $264.95
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KICKER 08ZX15001 4500w MONO CAR AMPLIFIER AMP ZX1500.1
Thu, 04 Jun 2009 01:19:38 PDT
US $499.00
End Date: Saturday Jul-04-2009 1:19:38 PDT
Buy It Now for only: US $499.00
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Crown DSi1000 - DSi 1000 Power Amplifier
Thu, 04 Jun 2009 00:23:51 PDT
US $799.99
End Date: Saturday Jul-04-2009 0:28:51 PDT
Buy It Now for only: US $799.99
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AMC Hybrid Vacuum Tube Amplifier CVT-2030
Thu, 05 Mar 2009 19:42:34 PST
US $619.98
End Date: Friday Jul-03-2009 20:47:34 PDT
Buy It Now for only: US $619.98
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50-pair,TUBE AMPLIFIER TERMINAL BINDING POSTS POST,SRBS
Fri, 26 Jun 2009 18:21:37 PDT
US $268.00 (0 Bid)
End Date: Friday Jul-03-2009 18:21:37 PDT
Buy It Now for only: US $268.00
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MB QUART DSC2000.1D CH DISCUS SERIES AMP CAR AMPLIFIER
Thu, 05 Mar 2009 22:58:44 PST
US $284.05
End Date: Saturday Jul-04-2009 0:03:44 PDT
Buy It Now for only: US $284.05
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2x 1:2 VGA/XGA Switcher Distribution Amplifier
Sat, 27 Jun 2009 00:58:03 PDT
US $205.99
End Date: Friday Jul-03-2009 18:58:00 PDT
Buy It Now for only: US $205.99
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Rotel RB-985 100w, thx, 5 channel power amplifier
Fri, 26 Jun 2009 18:46:54 PDT
US $379.99
End Date: Friday Jul-03-2009 18:46:54 PDT
Buy It Now for only: US $379.99
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Amplifier PYLE #PLA2220 2400-WATT 2 CHANNEL CHOPPER SR.
Fri, 26 Jun 2009 20:12:34 PDT
US $128.57
End Date: Friday Jul-03-2009 20:12:34 PDT
Buy It Now for only: US $128.57
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MA AUDIO M489I 800w 4 CHANNEL CAR AMPLIFIER STEREO AMP
Thu, 04 Jun 2009 01:13:09 PDT
US $104.95
End Date: Saturday Jul-04-2009 1:13:09 PDT
Buy It Now for only: US $104.95
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NEW NITRO 4 CHANNEL 1000WATT CAR AUDIO AMP AMPLIFIER
Wed, 03 Jun 2009 20:08:00 PDT
US $107.95
End Date: Friday Jul-03-2009 20:08:00 PDT
Buy It Now for only: US $107.95
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Pyle PLAD215 2 Channel 2000 Watt Amplifier AMP
Fri, 26 Jun 2009 18:50:30 PDT
US $152.95
End Date: Friday Jul-03-2009 18:50:30 PDT
Buy It Now for only: US $152.95
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Liberty Cable 1:2 Audio Distribution Amplifier
Sat, 27 Jun 2009 00:52:33 PDT
US $135.99
End Date: Friday Jul-03-2009 18:52:30 PDT
Buy It Now for only: US $135.99
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NEW QUANTUM AUDIO QCA2500D MONO D CAR AMPLIFIER AMP
Mon, 04 May 2009 22:26:27 PDT
US $159.44
End Date: Friday Jul-03-2009 22:31:27 PDT
Buy It Now for only: US $159.44
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Atlona 1X9 HDMI Splitter Amplifier with CAT5 Outputs
Fri, 05 Dec 2008 17:07:58 PST
US $849.00
End Date: Friday Jul-03-2009 18:12:58 PDT
Buy It Now for only: US $849.00
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PLANET AUDIO VX2200D 2250 WATT MONO CAR AMPLIFIER AMP
Thu, 04 Jun 2009 01:22:25 PDT
US $289.95
End Date: Saturday Jul-04-2009 1:22:25 PDT
Buy It Now for only: US $289.95
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Liberty Cable 1:5 Video Distribution Amplifier (RCA)
Sat, 27 Jun 2009 00:52:47 PDT
US $153.99
End Date: Friday Jul-03-2009 18:52:45 PDT
Buy It Now for only: US $153.99
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Rockford Fosgate Punch car amplifier
Sun, 28 Jun 2009 20:20:00 PDT
US $90.00 (0 Bid)
End Date: Friday Jul-03-2009 20:20:00 PDT
Buy It Now for only: US $125.00
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Pioneer GM-D8400M Car Amplifier Class D Mono 1200 Watts
Fri, 26 Jun 2009 19:25:08 PDT
US $129.00 (0 Bid)
End Date: Friday Jul-03-2009 19:25:08 PDT
Buy It Now for only: US $149.95
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PEAVEY MASSIVE 2 SPACE POWER DJ AMPLIFIER PV2600
Mon, 04 May 2009 20:00:00 PDT
US $589.99
End Date: Friday Jul-03-2009 20:05:00 PDT
Buy It Now for only: US $589.99
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New JL Audio 250/1 V2 Mono Channel Car Amplifier 250W
Mon, 04 May 2009 18:38:24 PDT
US $265.95
End Date: Friday Jul-03-2009 18:43:24 PDT
Buy It Now for only: US $265.95
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MB QUART DSC 4125 4 CH CAR AMP AMPLIFIER DSC4125 NEW
Tue, 23 Jun 2009 18:13:33 PDT
US $189.98
End Date: Friday Jul-03-2009 18:13:33 PDT
Buy It Now for only: US $189.98
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NEW POWER ACOUSTIK OVN2-1800 1800 WATT 2 CH AMPLIFIER
Thu, 04 Jun 2009 01:16:15 PDT
US $149.95
End Date: Saturday Jul-04-2009 1:16:15 PDT
Buy It Now for only: US $149.95
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1500 WATT/750w RMS MONO CAR STEREO AMPLIFIER BASS AMP
Thu, 04 Jun 2009 01:22:16 PDT
US $113.95
End Date: Saturday Jul-04-2009 1:22:16 PDT
Buy It Now for only: US $113.95
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NEW 09 PYLE 3000 WATT RACK MOUNT PRO AUDIO DJ AMPLIFIER
Tue, 23 Jun 2009 19:03:34 PDT
US $177.90
End Date: Friday Jul-03-2009 19:03:34 PDT
Buy It Now for only: US $177.90
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Amplifier PYLE #PLA4200 2000-WATT 4 CHANNEL CHOPPER SR.
Fri, 26 Jun 2009 20:12:30 PDT
US $128.57
End Date: Friday Jul-03-2009 20:12:30 PDT
Buy It Now for only: US $128.57
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Krell KAV-300i 2-Channel Amplifier
Wed, 01 Jul 2009 02:46:18 PDT
US $999.99 (0 Bid)
End Date: Friday Jul-03-2009 20:46:16 PDT
Buy It Now for only: US $1,499.99
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Marantz AV8003 Pre-Amplifier Preamplifier AV-8003
Sat, 27 Jun 2009 00:45:24 PDT
US $1,987.70
End Date: Saturday Jul-04-2009 0:45:24 PDT
Buy It Now for only: US $1,987.70
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NEW PYRAMID RACK MOUNT PRO DJ 3600w POWER AMPLIFIER/AMP
Tue, 23 Jun 2009 19:45:32 PDT
US $149.95
End Date: Friday Jul-03-2009 19:45:32 PDT
Buy It Now for only: US $149.95
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NAD YAMAHA MARANTZ SANSUI AMPLIFIER UPGRADE SERVICE
Wed, 03 Jun 2009 22:32:48 PDT
US $169.00
End Date: Friday Jul-03-2009 22:32:48 PDT
Buy It Now for only: US $169.00
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NEW LANZAR 2 CHANN 2400W MOSFET CAR AMP AMPLIFIER CHEAP
Wed, 03 Jun 2009 20:44:47 PDT
US $139.95
End Date: Friday Jul-03-2009 20:44:47 PDT
Buy It Now for only: US $139.95
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BOSS GT2500D 2500 WATT MONO CAR AUDIO AMPLIFIER SUB AMP
Thu, 04 Jun 2009 01:13:41 PDT
US $137.95
End Date: Saturday Jul-04-2009 1:18:41 PDT
Buy It Now for only: US $137.95
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NEW JL AUDIO G1300 MONOBLOCK CAR A/B SUB AMPLIFIER AMP
Sat, 27 Jun 2009 04:50:15 PDT
US $174.99
End Date: Friday Jul-03-2009 22:50:11 PDT
Buy It Now for only: US $174.99
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Pyle PT3300 3000 Watt Power Amplifier RACK MOUNT NEW
Fri, 26 Jun 2009 18:15:31 PDT
US $160.95
End Date: Friday Jul-03-2009 18:15:31 PDT
Buy It Now for only: US $160.95
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PYLE 6-CHANNEL 2000 WATT CAR AMPLIFIER 6ch SYSTEM AMP
Tue, 23 Jun 2009 20:29:39 PDT
US $219.95
End Date: Friday Jul-03-2009 20:29:39 PDT
Buy It Now for only: US $219.95
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Alpine F1 Status MRV-F900 Amplifier F#1 Factory Sealed
Fri, 26 Jun 2009 21:05:23 PDT
US $800.00 (0 Bid)
End Date: Friday Jul-03-2009 21:05:23 PDT
Buy It Now for only: US $1,449.00
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NEW PYLE 3000w POWER RACK MOUNT PRO AUDIO DJ AMPLIFIER
Tue, 23 Jun 2009 19:34:51 PDT
US $177.90
End Date: Friday Jul-03-2009 19:34:51 PDT
Buy It Now for only: US $177.90
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NEW PYLE 6 CHANNEL 2000W MARINE CAR AUDIO AMPLIFIER AMP
Fri, 26 Jun 2009 20:34:00 PDT
US $183.00 (0 Bid)
End Date: Friday Jul-03-2009 20:34:00 PDT
Buy It Now for only: US $184.00
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2 Channel 3100 Watts High Power MOSFET Amplifier
Fri, 26 Jun 2009 19:20:30 PDT
US $185.95
End Date: Friday Jul-03-2009 19:20:30 PDT
Buy It Now for only: US $185.95
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Valve Tube Amplifier. Mono Block. Audiophile Grade. New
Fri, 26 Jun 2009 20:17:00 PDT
US $795.40
End Date: Friday Jul-03-2009 20:17:00 PDT
Buy It Now for only: US $795.40
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Mackie M2000 Stereo Power Amplifier
Sun, 28 Jun 2009 19:53:12 PDT
US $500.00 (0 Bid)
End Date: Friday Jul-03-2009 19:53:12 PDT
Buy It Now for only: US $525.00
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MB QUART DSC1500.1D CH DISCUS SERIES AMP CAR AMPLIFIER
Thu, 05 Mar 2009 22:56:01 PST
US $218.50
End Date: Saturday Jul-04-2009 0:01:01 PDT
Buy It Now for only: US $218.50
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Liberty Cable 1:2 Video Distribution Amplifier
Sat, 27 Jun 2009 00:52:35 PDT
US $131.99
End Date: Friday Jul-03-2009 18:52:32 PDT
Buy It Now for only: US $131.99
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Liberty Cable VGA/XGA Line and Distribution Amplifier
Sat, 27 Jun 2009 00:52:40 PDT
US $194.99
End Date: Friday Jul-03-2009 18:52:34 PDT
Buy It Now for only: US $194.99
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NEW TMA T1000.1 TOTAL MOBILE AUDIO MONO CAR AMPLIFIER
Thu, 04 Jun 2009 01:21:42 PDT
US $219.95
End Date: Saturday Jul-04-2009 1:21:42 PDT
Buy It Now for only: US $219.95
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JL AUDIO 300/2V2 V2 AMP 2 CHANNEL SPEAKER AMPLIFIER NEW
Tue, 23 Jun 2009 18:44:06 PDT
US $324.15
End Date: Friday Jul-03-2009 18:44:06 PDT
Buy It Now for only: US $324.15
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Marine Amplifier 1000 Watt 4 Ch. & & 4 Speakers c
Fri, 26 Jun 2009 20:11:07 PDT
US $218.64
End Date: Friday Jul-03-2009 20:11:07 PDT
Buy It Now for only: US $218.64
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KICKER 08ZX850.4 4 CHANNEL CAR AUDIO AMPLIFIER ZX850.4
Wed, 03 Jun 2009 20:46:01 PDT
US $339.85
End Date: Friday Jul-03-2009 20:46:01 PDT
Buy It Now for only: US $339.85
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Altec Lansing 1593B 50 Watt Power Amplifier
Wed, 03 Jun 2009 21:15:23 PDT
US $187.11
End Date: Friday Jul-03-2009 21:20:23 PDT
Buy It Now for only: US $187.11
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Marine Amplifier 1000 Watt 4 Ch. & & 2 Speakers & Sub c
Fri, 26 Jun 2009 20:11:08 PDT
US $218.64
End Date: Friday Jul-03-2009 20:11:08 PDT
Buy It Now for only: US $218.64
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Denon AVR-2809 Home Cinema Receiver Amplifier AVR2809
Sat, 27 Jun 2009 01:11:13 PDT
US $1,192.30
End Date: Saturday Jul-04-2009 1:11:13 PDT
Buy It Now for only: US $1,192.30
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Liberty Cable 1:3 Video/Audio Distribution Amplifier
Sat, 27 Jun 2009 00:52:44 PDT
US $168.99
End Date: Friday Jul-03-2009 18:52:41 PDT
Buy It Now for only: US $168.99
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PRO 8 CHANNEL POWERED PROFESSIONAL PA MIXER/AMPLIFIER
Tue, 23 Jun 2009 20:43:53 PDT
US $189.00
End Date: Friday Jul-03-2009 20:43:53 PDT
Buy It Now for only: US $189.00
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NEW 1500 WATT 2U RACK MOUNT AMPLIFIER PRO POWER DJ AMP
Thu, 04 Jun 2009 01:19:35 PDT
US $169.00
End Date: Saturday Jul-04-2009 1:19:35 PDT
Buy It Now for only: US $169.00
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RARE TEECO TRUESOUND HI-FI 6V6 TUBE AMPLIFIER !!
Sun, 28 Jun 2009 18:07:53 PDT
US $125.00 (0 Bid)
End Date: Friday Jul-03-2009 18:07:53 PDT
Buy It Now for only: US $225.00
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1x2 ATLONA HDMI DISTRIBUTION AMPLIFIER
Sat, 27 Jun 2009 00:00:51 PDT
US $286.34
End Date: Saturday Jul-04-2009 0:00:51 PDT
Buy It Now for only: US $286.34
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Liberty Cable Differential Video Line Amplifier
Sat, 27 Jun 2009 00:52:42 PDT
US $153.99
End Date: Friday Jul-03-2009 18:52:39 PDT
Buy It Now for only: US $153.99
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Mackie M1400i Power Amplifier Rack Mountable
Fri, 26 Jun 2009 20:00:00 PDT
US $199.00
End Date: Friday Jul-03-2009 20:00:00 PDT
Buy It Now for only: US $199.00
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NEW LANZAR MXA282 2 CHANNEL 4000W CAR AMP AMPLIFIER
Fri, 26 Jun 2009 22:14:22 PDT
US $158.95
End Date: Friday Jul-03-2009 22:14:22 PDT
Buy It Now for only: US $158.95
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Phase Tech EA-3 Phono Amplifier, Made in Japan
Sat, 04 Apr 2009 21:50:09 PDT
US $1,750.00
End Date: Friday Jul-03-2009 21:55:09 PDT
Buy It Now for only: US $1,750.00
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QUANTUM AUDIO MONO 2000 WATTS STEREO CAR AMP AMPLIFIER
Fri, 26 Jun 2009 22:29:30 PDT
US $149.90
End Date: Friday Jul-03-2009 22:29:30 PDT
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Articles
Related Articles
Thu, 24 Jul 2008 00:00:00 -0500
Amplifier-Loudspeaker Matching Formula in a home theater system
Ozhan Atalay


In terms of power, we compare the power of amplifier (watts) by the power handling capacity (watts) of the loudspeaker. Power capacity of the loudspeaker is measured by watts but actually the power of a speaker is measured by sound production capacity which is measured by decibel (dB). dB does not have linearity with power handling capacity (watts)

The electricity signal is transformed to sound energy by loudspeakers. Power handling capacity of the speaker is measured by watts but sound production capability is measured by dB. For instance there are speakers; both of them are 100 Watts. One produces 90 dB (1 mt 1watt) and other produces 93 dB. Second one does provide twice volume of sound by the same power compared the first.

By using the program below, you may easily calculate how much dB that you may provide by your system or you may choose your amplifier or speaker in accordance with your demand.

This unique software has been prepared in Ms Excel and does not have any similar one throughout world.

Calculation of sound volume has so many complexities. The furniture, room dimensions, floor coverings, windows, heat, humidity, number of people at the room etc my software can not provide 100% accuracy but it gives idea and guides listener through more conscious way. According to me, a full-range system should provide at least 93 dB of sound. Attacks of a symphonic orchestra may come close to such levels. So if you tend to set up a full range system, your aim should be to achieve 93 dB sound at the listening chair.

Input the parameters of your system to the software below and calculate what you have at your listening chair. In other words, put your desired parameters and calculate what hardware you should purchase.

I would like to add a foot note here that when you use the formula, result will be limited to the power of your speaker. If your power amplifier is powerful than your speaker, if yes, then input your speaker's power to formula.
For instance assume your speaker has 100 Watts of power but your amplifier has 250 Watts of power. Your sound will be limited to your speaker, hence input 100 Watts of amplifier power but not 250 Watts.
Let me know about your experiment.
Please go to link below to use formula.
http://www.nonamehifi.com/how_much_watts.xls

Ozhan Atalay www.nonamehifi.com
December 2004 that article can be shared by referring to www.nonamehifi.com
Copyright � NonameHifi

--
Ozhan Atalay
President - NonameHifi High End Audio Pages
http://www.nonamehifi.com
NonameHifi provides audio and audiophile pages High-End audio components HiFi audio equipment for sale, free classifieds,used audio, electronics and audiophile pages

Source: http://www.articletrader.com
Wed, 06 Aug 2008 00:00:00 -0500
How to choose the right speakers for your amplifier or AV receiver
From:http://www.1topsupplier.com/buy-speaker/
Key words: amplifier,speaker,receiver
Impedance: Measured in ohms (Ω), typically 4, 6 or 8. The lower the impedance, the more demand the speakers place on the amplifier, which is why matching the impedance of your speakers to your amplifier is important. Most home theatre speakers will be 6 or 8Ω, as are most home theatre amplifiers. Hi-Fi (2 channel) amplifiers are often capable of handling impedances of anywhere from 8Ω, all the way down to 2Ω. Consequently, speakers designed for 2 channel systems come in a wider range of impedances.
If, for example, you connected 6Ω speakers to an 8Ω amplifier, they would put more of a load on the amp than it’s designed to handle, and produce less than dynamic (clean, effortless) sound. You then run the risk of the amplifier overheating and shutting down, or worse, burning out altogether. This will only happen after you notice distortion in increasing amounts though. Thankfully, most modern amps and AV receivers have protection circuits, thermal fuses and the like, to shut them down in the event of overload.
A common complaint of people with mismatched speaker/amp combinations is that they shut down during loud action scenes in movies, or after 2-3 minutes of music at a moderate level. The amplifier/AV receiver often gets unfairly blamed in this scenario.
Power handling: An often misunderstood specification. Measured in watts, it is best represented by RMS (root means square.) This figure tells us how much power the speaker can comfortably handle for a sustained period of time. Also referred to as continuous, or nominal power.
Some speakers only list a peak power rating. This can be measured in many different ways. It’s essentially a rating for the mechanical limitations of the speaker, and often represents how much power a speaker can take before it produces audible distortion. Depending on the type of signal being played back, the speaker may reach its mechanical limits at well below its rated power - for example, bass-heavy movie soundtracks and extremely high frequencies will challenge a speakers mechanical ability. For this reason, power handling doesn’t necessarily translate as a speakers ability to produce sound as many would have you believe.




--
How to choose the right speakers for your amplifier or AV receiver

Source: http://www.articletrader.com
Sun, 04 May 2008 00:00:00 -0500
A musician who takes their craft seriously will invest in the best music equipment possible. This process is no different for the guitarist in need of a good quality guitar amplifier. If you are new to the world of guitar amplifiers, don't let the various brands and models confuse you. The basics below should help you on your way to making the right choice.

There are four basic options when choosing a guitar amplifier. Amplifiers are available in tube, digital, hybrid, and solid-state. Tube amplifiers were the first amplifiers in use. While this remains the older model amp, many guitarists prefer it as it produces a more natural sound than the other models. The output is also greater and is much louder in comparison to the other models. However, since tube amplifiers are built with glass tubes, transporting them needs to be done with care to avoid breaking the tubes.

Digital amplifiers are one of the more expensive types of amps due to their ability to mimic various ranges of amplifier sounds. You can find lower-end versions of the digital amplifier, however you get what you pay for, and the sound quality will be lower. Many guitarists enjoy digital amplifiers as they are able to experiment more with different styles and sounds.

The hybrid guitar amplifiers do exactly as the name implies. They are a combination of the tube amplifier and solid-state amps. Unlike the sound quality you can achieve with a regular tube amplifier, the more natural sound will be lacking. The hybrid amplifier is a good option for those who want a decent amp but are on a budget.

Solid state amplifiers are simply made with transitors rather than the glass tubes. This may be a preference for those who tote around their amplifiers often, as their isn't as much worry about breaking the tubes. Sound quality on these amplifiers are decent but still not as favored as the original tube amplifiers.

Before choosing your next guitar amplifier, you may consider asking to try out the various models before you buy. Don't hesitate to ask to try before you buy. Most music stores are more than happy to cooperate in order to help in the buying process.

--

Find a huge selection of new and used amplifiers and save money on your next guitar amplifier purchase by visiting Amplifier Depot.



Source: http://www.articletrader.com
Wed, 25 Jul 2007 00:00:00 -0500
The word heterodyne means to mix. Heterodyne reception stands for the radio reception after covering the modulated carrier voltage into similarly modulated voltage at a different carrier frequency. Thus the heterodyning involves a simple change or translation of carrier frequency. This change in carrier frequency is achieved by heterodyning or mixing the modulated carrier voltage with a locally generated high frequency voltage in a non linear device to obtain at the output a similarly modulated carrier voltage at the difference carrier frequency, called the intermediate frequency.

Super heterodyne reception is a form of heterodyne reception in which frequency conversion takes place one or more times before the modulated carrier voltage is fed to the detector to recover the original modulated frequency voltage. In practice, however the name super heterodyne is applied to receivers in which only one frequency conversion takes place before detection. The receiver in which frequency conversion takes place twice before detection is called a double super heterodyne receiver or a triple detection receiver.

In a simple super heterodyne receiver the modulated carrier voltage of frequency is fed to a non linear device called the frequency mixer or simple mixer to which is also fed the voltage of frequency generated in a local oscillator and at the output we get voltages of sum and difference frequencies. A tuned circuit in the output of the mixer stage tuned to the difference frequency picks up this frequency component constituting the immediate frequency. This intermediate frequency voltage is modulated exactly similar to the incoming modulated carrier voltage. There results only a translation or change in the carrier frequency. This intermediate frequency is fixed for a receiver. The constant difference frequency is maintained between the local oscillator frequency and the radio frequency signal frequency usually through use of capacitance tuning wherein the capacitors in the radio frequency tuned circuits and local oscillators are ganged together and operated in unison through use of a single control knob.

The intermediate frequency amplifier is a two or three stage tuned amplifier tuned to the intermediate frequency and it provides most of the gain and hence the sensitivity of the receiver. It also fixes the three decibel bandwidth of the receiver. The intermediate frequency amplifier, being fixed frequency amplifier has fairly uniform selectivity and sensitivity and the entire super heterodyne receiver has almost constant selectivity and sensitivity through out the carrier frequency band. In this respect it is superior to tuned radio frequency receiver in which both the selectivity and sensitivity change greatly with the carrier frequency. Further the radio frequency amplifier stage in super heterodyne receiver rejects the image frequency. Because of the various merits of super heterodyne receivers over tuned radio receivers, these super heterodyne receivers most popularly used in almost all radio receivers applications.



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Tymon Hytem has worked in the electronics feild for the past 15 years. He enjoys helping people decide on electronic gadgets from telephones to XM Radio and choosing the perfect XM Satellite Radio system for their needs.

Source: http://www.articletrader.com
Tue, 10 Jul 2007 00:00:00 -0500
Methods of amplitude modulation can be put in the two categories namely Linear modulation methods and Square law modulation methods. Linear modulation method utilizes the linear region of the current voltage characteristics of the amplifying device that is transistor or electron tube. Square law modulation method utilizes the square law region of some current voltage characteristics of a diode or transistor or electron tube. A large number of linear modulation methods have been devised and have been used to varying degree. These methods are namely linear shunt plate modulation or anode choke modulation, linear series plate modulation, grid bias modulation, cathode modulation, suppressor grid modulation, screen grid modulation, collector modulation.

Square law modulation circuits make use of non linear current voltage characteristics of diodes or triodes and are in general suited for use at low voltages. Important square law modulation methods are square law diode modulation and balanced modulator.

In linear shunt plate modulation the modulation voltage is inserted in the plate circuit of a class C amplifier tuned to the carrier frequency. The plate currents of modulated amplifier tube and the modulating amplifier tube find parallel paths or shunt paths. The carrier voltage is applied at the input of the class C modulated amplifier. Linear series plate modulation makes use of a linear class C tunes amplifier as modulated amplifier. This tuned amplifier is so designed that a linear relation exists between the root mean square value of peak tank current and the plate supply voltage for constant grid excitation. The modulating voltage appears in series with the plate supply voltage of the tuned modulated amplifier.

The merits of linear series plate modulation are small distortion, high plate circuit efficiency and easy adjustments. Grid bias modulation uses a class C amplifier in which audio modulated voltage is placed in series with the fixed grid bias. In Cathode modulation the modulation voltage is introduced in the cathode circuit of the class C modulator amplifier. It has characteristics intermediate between those of grid bias modulation and plate modulation.

Suppressor grid modulation uses a pent code in a class C modulated amplifier wherein the modulating voltage is applied to the suppressor which is biased sufficiently negatively. It provides linear modulation up to eighty percent modulation depth. Screen grid modulation is applied at the screen grid. The distortion produced is low. In the collector modulation method the modulating voltage is applied in the collector circuit of tuned class C amplifier in push pull arrangement. It has the merits of high linearity of modulation, high collector circuit efficiency and high power output per transistor.

Square law modulation methods makes use of non linear current voltage characteristics of diodes or triodes and are suited only for use at low voltages. Square law diode modulation uses non linear region of the current voltage dynamic characteristics of a diode.


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Tymon Hytem has worked in the electronics feild for the past 15 years. He enjoys helping people decide on electronic gadgets from telephones to XM Radio and choosing the perfect XM Satellite Radio system for their needs.

Source: http://www.articletrader.com
Tue, 16 Sep 2008 00:00:00 -0500
If you love playing the guitar, you also love hearing them at concerts and other events. One thing is for certain, if you are going to play for an audience, you need an amplifier that will deliver quality sounds.While building guitar amplifier kits is an excellent way to get a wonderful sounding amplifier at a greatly discounted price, there is a catch. Most kits require an intermediate to advanced understanding of electronics to correctly and safely complete themThe good folks at Tube Depot sell complete kits modeled after some of the most popular amplifiers ever made: Fender Tweed, Fender Blackface Deluxe, Fender Bassman and Marshall JTM 45. Kits for high quality Hi-Fi systems are also available.
Guitar amplifiers are electronic amplifiers specially designed to be used with electronic musical instruments.
They are mainly made in two major forms. The combination (or combo) amplifier has the amplifier head and guitar speakers in a single unit. The contains the electronic circuitry constituting the preamp, built in effects processing, and power amplifier.
In the second form, the head is detached from the speakers, and joined by cables. The separate head is normally located on top of one or more loudspeaker enclosures. This separate head when placed on top of a speaker enclosure or cabinet forms an amplifier stack or amp stack.
A wide range of instrument amplifiers is now available, some for general purposes and some designed for specific instruments and even for particular sounds. Traditional guitar amplifiers come up with a clean, warm sound, a sharp treble roll off at 5 kHz or less and bass roll off at 60 to100 Hz, often with built in reverb and tremolo units. Bass amplifiers have extended bass response and tone controls optimized for bass guitars (or more rarely, for upright bass).
Higher end bass amplifiers sometimes include compressor or limited features, which help to keep the amplifier from distorting at high volume levels. Keyboard amplifiers have a very low distortion and extended flat frequency response in both directions. Keyboard amplifiers often have a simple onboard mixer, so that keyboardists can control the tone and level of several keyboards. Acoustic amplifiers are designed specifically to produce a clean, transparent, acoustic sound when used with acoustic instruments with built in transducer pickups and microphones.
Marshall Amplification is a British company which designs and manufactures electric guitar amplifiers. Marshall Amplifiers are well known and highly popular among guitarists. Marshall Amplifiers were originally built as direct copies of Fender amplifiers, but soon incorporated certain traits which made them more favorable to guitarists seeking a heavier sound. Like most professional level amplifiers, Marshall amplifiers still use valve preamp and power amplifier stages instead of solid state devices. Marshall also manufactures cheaper solid-state or hybrid devices.


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http://www.amplifiersdotcom.com

Source: http://www.articletrader.com
Thu, 01 May 2008 00:00:00 -0500
A car stereo amplifier is a necessity if you take your car audio seriously. A car stereo amplifier is what helps determine the type of audio output your stereo will produce. If you have never experienced what a car amplifier can do, you will be blown away at the quality of sound that can be achieved. In fact, once you hear your favorite music played with the power of an amp, you will be instantly hooked.

When you decide to purchase a car amplifier, one of your first decisions will be where to place it in your vehicle. You have several options but keep in mind an area where the amplifier will have the best air circulation. Common areas to install the amplifier include the trunk or under a seat. Also remember that the amplifier needs to be grounded so a metal surface to attach it to is key.

Most people will have professionals install their car amps. If you are a do-it-yourselfer, the next step is deciding how to connect the amplifier to your car stereo. RCA cables are the common cable type to use and they are used to connect the low level radio output to the low level input of the amp. There are other cable set-ups to use and some precautions to take before hooking up cables. These precautions should be laid out fairly well in the user's manual.

There are a few things to keep in mind when installing a car amplifier:

1. The amplifier should be installed on top of metal as a ground conductor.
2. Ground cables should be connected before the RCA cables.
3. Avoid installing power cables next to RCA cables to help avoid extra noise.

Again, the user manual should go over these elements in depth. Number one is very important, since newer model cars are made mainly of fiberglass, it may be difficult finding a solid piece of metal to attach the amplifier to.

When it comes to such technical issues as installing a car amplifier, you may be better off spending the extra money having one professionally installed. You can save yourself a lot of time and frustration. However, if you are adamant about doing it yourself, research online as well as reading the user's manual thoroughly to be safe and avoid any damage.

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Find a wide selection and huge discounts on new car stereo amplifiers by visiting Amplifier Depot.



Source: http://www.articletrader.com
Tue, 10 Jul 2007 00:00:00 -0500
The amplitude radio transmitter using high frequency power level of carrier has the following constituent stages namely master oscillator, buffer amplifier or isolating amplifier, harmonic generators, class C power amplifiers, modulated amplifier and the modulating amplifier. All high frequency power level of carrier requires all there stages.
The master oscillator generates oscillations of desired frequency with high constancy of frequency. The generated frequency is required to remain constant within close limits in spite of variations in the supply voltage, ambient temperature and temperature of components of load. Further frequency variations with time and with age of the transistor should be avoided.
If the master oscillator directly drives a harmonic generator or class C power amplifier which draw input current then power is drawn from the master oscillator. This results in loading of master oscillator which in turn causes variation of effective resistance of the tank circuit of the oscillator and hence results in frequency variation. Accordingly a buffer amplifier or isolating amplifier is placed between the master oscillator and the harmonic generators. This buffer amplifier does not draw any input current and hence causes no loading of the master oscillator. Changes in carrier frequency due to variations in loading are thus avoided.
Usually the master oscillators generate voltage at a frequency which is a sub multiple of the carrier frequency that is the frequency of the radiated power. Basically these harmonic generators are class C tuned amplifiers in which the output radio frequency voltage is first distorted through class C operation and then the tuned circuit in the output circuit of amplifier selects the desired harmonic frequency.
The radio frequency voltage generated by the master oscillator has usually very small power of the order of few watts. The power level is required to be raised to the final high value in a chain of class C amplifier having high output circuit efficiency of the order of seventy percent.
The modulated amplifier is a class C amplifier usually of the push pull type and is modulated by audio modulating voltage from modulating amplifier. High efficiency series plate modulation is most popularly used in high power radio broadcast and radio telephone transmitters. Grid bias modulation and suppressor grid modulation are used particularly for modulation at low power levels.
The modulating amplifier is usually a class B push pull amplifier and feeds audio power into the modulating amplifier in the plate circuit, the control grid circuit or the suppressor grid circuit depending upon the method of modulation used. Class B operation is generally used because of high plate circuit efficiency. While the Class A modulating amplifier are also sometimes used particularly in low power transmitters.


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Tymon Hytem has worked in the electronics feild for the past 15 years. He enjoys helping people decide on electronic gadgets from finding the right phone for your business and can help you choose the perfect Background Music for your business needs

Source: http://www.articletrader.com
Tue, 20 Jan 2009 02:14:00 -0600

Do you really like listening songs while driving, but are not able to enjoy because of unsatisfactory car audio system? Now with technological improvement there are wide varieties of car gadgets and components which can help you to make your car audio rock.

Here are three simple tips to make your car audio rock:

Change your original speakers and add a subwoofer

This is the best option when it comes to making your car audio rock. As the original speakers are made up of papers they are tend to get spoilt over a period of time. Regardless of the type of music you hear installing subwoofers to your car can prove to be a great option to make your car audio rock. The subwoofer adds dimensions to your sound system and enhances the bass to improve the quality of sound. It doest matter whether you hear classical, hard rock, jazz etc subwoofers are the best for any type of music.

Use an advanced and more powerful amplifier

An amplifier is considered to be a heart of any sound system, therefore it very important to install an advanced and more powerful amplifier. The more powerful amplifier less will be the distortion which will therefore help you to hear crystal clear music. Today’s listening habits are such that the old amplifiers won’t support it and therefore there is a need of a powerful amplifier in order to make your car audio rock. The noise of the traffic, wind etc can harm the quality of sound, in this case the powerful amplifier can easily beat such barriers and help you to hear the best quality of sound. The amplifier can make your music experience lively and this can envy others.

Change to a new car stereo

Many people have old broken radio or old stereo system which not at all provides good sound. Changing to a new car stereo is one such option will enable you to get better sound quality. There are many varieties of car stereo available in the market right from single to multiple CD changers along with equalizer setting. The equalizers will allow you to change the equalizing curves based on your mood. You can change the equalizer from normal to powerful or somewhere in medium depending upon your liking. There are many stereos which come with built-in-security alarm hence you don’t have to take tension about its theft.



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Steve Lovelace operates http://creativeacoustics.com - the leading provider of Car Audio and Home Audio design, installation, repair and sales of equipment parts in the city of Raleigh, North Carolina are adjoining areas. Check out their Custom Car Audio services at http://creativeacoustics.com/caraudio.aspx and Home Audio options at http://creativeacoustics.com/homeaudio.aspx

Source: http://www.articletrader.com
Wed, 25 Jul 2007 00:00:00 -0500
There are different stages of a super heterodyne receiver namely antenna or aerial, radio frequency amplifier, frequency converter stage, intermediate amplifier stage, second detector, audio frequency amplifier and loud speaker.

An aerial intercepts the electromagnetic waves. Voltage induced in the antenna re communicated to the receiver input circuit by means of a feeder wire or lead in wire. A parallel tuned circuit at the input of the receiver responds only to voltage at the desired carrier frequency and rejects voltage at all other frequencies. The voltage so picked up is fed to the input of radio frequency amplifier stage.

Radio frequency amplifier stage is generally a tuned voltage small signal amplifier tuned to the desired carrier frequency. The chief functions of radio amplifier stage are to amplify the input signal voltage to a suitably high level before feeding it to the frequency mixer which contributes large noise. Thus signal to noise ratio is improved and the other function is to provide discrimination of selectivity against image frequency signal and intermediate frequency signal.

Frequency converter stage consists of a local oscillator and frequency mixer. To the frequency mixer are fed both the local oscillator voltage as well as signal v0oltage. The mixer, being a non linear device, produces at its output the various inter modulation terms. The difference frequency voltage is picked up by the tuned circuit in the output circuit of the mixer. The difference frequency is called the intermediate frequency, the value of which is constant of a receiver. For all wave receivers, typical value of intermediate frequency is four hundred sixty five kilo hertz or four hundred fifty six kilo hertz. Some times two separate transistors are used as local oscillator and frequency mixer but more often only one transistor functions both as local oscillator and frequency mixer. Such a transistor is then referred to as a frequency converter transistor. Thus with the help of frequency converter stage, radio frequency signal of any carrier frequency is converted into similarly modulated fixed frequency intermediate frequency signal.

Intermediate frequency amplifier stage consists of two or more stages of fixed frequency voltage amplifier having a three decibel bandwidth of ten kilo hertz for a amplitude modulation broadcast. This intermediate frequency amplifier provides most of the receiver amplification and selectivity.

Output of the last intermediate frequency amplifier stage is fed to this second detector which is generally a linear diode detector. Output of this detector is the original modulation frequency voltage. For satisfactory operation of this detector that is for linear detection, it is necessary that the carrier voltage fed to it be at least one volt. Audio frequency output from second detector is fed to the audio frequency amplifier which provides original amplification. Then amplified voltage is fed to the loud speaker.



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Tymon Hytem has worked in the electronics feild for the past 15 years. He enjoys helping people decide on electronic gadgets from telephones to XM Radio and choosing the perfect XM Satellite Radio system for their needs.

Source: http://www.articletrader.com
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