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An electronic amplifier is a device for increasing the current, voltage or power of a signal. It does this by taking power from a power supply and controlling the output to match the input signal shape but with a larger amplitude. more...

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Adcom Gtp-350 Stereo Tuner / PreamplifierAdcom Gtp-350 Stereo Tuner / Preamplifier $195.00 Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v.Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v. $199.99
Adcom Gtp-600 Tuner Preamplifier Used Tested & Works.Adcom Gtp-600 Tuner Preamplifier Used Tested & Works. $275.00 Adcom Gtp-450 2 Channel Pre-Amp/Processor Amplifier with remoteAdcom Gtp-450 2 Channel Pre-Amp/Processor Amplifier with remote $179.95
Adcom Gtp-350 preamplifier tuner (For Parts Or Repair)Adcom Gtp-350 preamplifier tuner (For Parts Or Repair) $65.00 Adcom Gfp-715 Preamplifier PreampAdcom Gfp-715 Preamplifier Preamp $300.00
Adcom Gtp-700 Home Theater Preamplifier Tuner - Original Remote, Manual & BoxAdcom Gtp-700 Home Theater Preamplifier Tuner - Original Remote, Manual & Box $250.00 Adcom Gtp-600 Surround Sound Tuner Preamplifier - As IsAdcom Gtp-600 Surround Sound Tuner Preamplifier - As Is $169.00
Adcom Gtp-506 Tuner/ Preamp Tested!Adcom Gtp-506 Tuner/ Preamp Tested! $299.99 Adcom Gtp-830 Preamp. Remote Manual Tested & Working.Adcom Gtp-830 Preamp. Remote Manual Tested & Working. $239.99
Adcom Model Gtp-600 Surround Sound Tuner / PreamplifierAdcom Model Gtp-600 Surround Sound Tuner / Preamplifier $140.00 Adcom Gtp-550 Preamplifier Audio Processor -For Restoration / Does Not Power On.Adcom Gtp-550 Preamplifier Audio Processor -For Restoration / Does Not Power On. $120.00
Classic Adcom Gfp-710 Stereo PreamplifierClassic Adcom Gfp-710 Stereo Preamplifier $395.00 Adcom Gtp 400 Stereo Preamp NiceAdcom Gtp 400 Stereo Preamp Nice $350.00
Mint Boxed Adcom Gsp-560 Pre-Amplifier Home Theater Amplifier with Original BoxMint Boxed Adcom Gsp-560 Pre-Amplifier Home Theater Amplifier with Original Box $119.00 Adcom Gfa-555 Ii + Gfa 555 Power Amp + Adcom Gfp 555 PreamplifierAdcom Gfa-555 Ii + Gfa 555 Power Amp + Adcom Gfp 555 Preamplifier $600.00
Adcom Gfp-565 preamp. relay 24 volt Takamisawa Ry24W-K New Qty 2 Relays.Adcom Gfp-565 preamp. relay 24 volt Takamisawa Ry24W-K New Qty 2 Relays. $18.75 Adcom Gfp-710 Preamp And Gft-555 Tuner.Adcom Gfp-710 Preamp And Gft-555 Tuner. $350.00
Adcom Gtp-500 Ii 2 Channel Pre-Amp / Processor Amplifier - Used - Powers onAdcom Gtp-500 Ii 2 Channel Pre-Amp / Processor Amplifier - Used - Powers on $189.99 Adcom Slc-505 Straight Line Controller Passive PreamplifierAdcom Slc-505 Straight Line Controller Passive Preamplifier $149.99
Adcom Gtp-450 Tuner/Preamp (Ez5001564)Adcom Gtp-450 Tuner/Preamp (Ez5001564) $199.99 Adcom Gfa 535 ii and Yamaha Avc-70 Pre Amp comboAdcom Gfa 535 ii and Yamaha Avc-70 Pre Amp combo $300.00
Adcom Gtp-350 Preamplifier/Tuner TestedAdcom Gtp-350 Preamplifier/Tuner Tested $249.00 Vintage Adcom Gtp-502 PreamplifierVintage Adcom Gtp-502 Preamplifier $40.00
Adcom Gtp-400 Pre-Amp Preamplifier Stereo Tuner Processor Am/FmAdcom Gtp-400 Pre-Amp Preamplifier Stereo Tuner Processor Am/Fm $124.99 Adcom Gtp-500 Am/Fm Tuner Preamplifier Works PerfectlyAdcom Gtp-500 Am/Fm Tuner Preamplifier Works Perfectly $120.00
Adcom Gtp-860 ll Preamplifier Processor Read The Description Before You Buy Adcom Gtp-860 ll Preamplifier Processor Read The Description Before You Buy  $325.00 Adcom Gfp-555 Stereo Pre-amplifier Phono PreampAdcom Gfp-555 Stereo Pre-amplifier Phono Preamp $250.00
Nobsound Ns-10P Mini Vacuum Tube Stereo Preamp HiFi Home Audio Pre-AmplifierNobsound Ns-10P Mini Vacuum Tube Stereo Preamp HiFi Home Audio Pre-Amplifier $74.99 Early 90's Adcom Gfa-535 Power Amp & Gtp-500 Preamp Read Description Free ShipEarly 90's Adcom Gfa-535 Power Amp & Gtp-500 Preamp Read Description Free Ship $259.00
Adcom Gtp-600 Home Theater Preamplifier Tuner w/ Original Remote & ManualAdcom Gtp-600 Home Theater Preamplifier Tuner w/ Original Remote & Manual $213.00 Adcom Gtp-500Ii Tuner/preamplifier W/ Box & Some CordsAdcom Gtp-500Ii Tuner/preamplifier W/ Box & Some Cords $150.00
Adcom Gtp-400 Stereo Tuner Preamplifier| Used | AAdcom Gtp-400 Stereo Tuner Preamplifier| Used | A $119.99 Adcom Gfp 565Adcom Gfp 565 $399.00
Mod Squad Line Drive System Control Center Preamp Pre Amplifier AmpMod Squad Line Drive System Control Center Preamp Pre Amplifier Amp $286.87 Adcom Gtp-350 Preamplifier /Tuner -Adcom Gtp-350 Preamplifier /Tuner - $199.99
Adcom Gfa-555ii Amplifier W/ Gtp 500 Ii Preamplifier Set Both Work GreatAdcom Gfa-555ii Amplifier W/ Gtp 500 Ii Preamplifier Set Both Work Great $729.00 Adcom Gfp-1 Stereo Preamplifier High QualityAdcom Gfp-1 Stereo Preamplifier High Quality $300.00
New Boaleco Bx1 HiFi 5654W tube preamplifier with Bass /Treble high quality helpNew Boaleco Bx1 HiFi 5654W tube preamplifier with Bass /Treble high quality help $151.13 Adcom Gtp-500 Ii 2 Channel Pre-Amp/Processor Amplifier Power cord Tuner BlackAdcom Gtp-500 Ii 2 Channel Pre-Amp/Processor Amplifier Power cord Tuner Black $189.99
Adcom Gfp-555 Preamp Ex+ CondAdcom Gfp-555 Preamp Ex+ Cond $225.00 Adcom Gtp-740 A/V Preamplifier & Tuner Powers on and Functions workAdcom Gtp-740 A/V Preamplifier & Tuner Powers on and Functions work $230.00
Adcom Gfp-1A PreamplifierAdcom Gfp-1A Preamplifier $350.00 Adcom Gtp-880 7.1 Preamp - Used with RemoteAdcom Gtp-880 7.1 Preamp - Used with Remote $225.00
Adcom Gfp-715 Stereo Preamplifier in Black in 120V- 230V, Made in ThailandAdcom Gfp-715 Stereo Preamplifier in Black in 120V- 230V, Made in Thailand $850.00 Adcom Gtp-500 Ii 2 restoration recap upgrade kit repair filter capacitor rebuildAdcom Gtp-500 Ii 2 restoration recap upgrade kit repair filter capacitor rebuild $145.00
Adcom Gtp-350 Stereo Tuner/Preamplifier and Gfa 535Ii Power AmplifierAdcom Gtp-350 Stereo Tuner/Preamplifier and Gfa 535Ii Power Amplifier $349.00 Early 90's Adcom Gfa-535 Power Amp and Pre amp Gtp-500Early 90's Adcom Gfa-535 Power Amp and Pre amp Gtp-500 $385.00
Adcom Gtp-500 Ii Preamp Vintage Used No Remote Tuner Not WorkingAdcom Gtp-500 Ii Preamp Vintage Used No Remote Tuner Not Working $199.00 Adcom Gfp-915 Stereo Preamplifier Demo ModelAdcom Gfp-915 Stereo Preamplifier Demo Model $875.00
Adcom Gtp-500Ii 2 Channel Pre-AmpProcessor Amplifier & TunerAdcom Gtp-500Ii 2 Channel Pre-AmpProcessor Amplifier & Tuner $215.00 Adcom Model Gfp-565 Solid State High Performance Stereo Preamplifier TestedAdcom Model Gfp-565 Solid State High Performance Stereo Preamplifier Tested $499.00
Adcom Gtp-600 Surround Sound Tuner Preamplifier Gtp600 Home Movie Theatre DolbyAdcom Gtp-600 Surround Sound Tuner Preamplifier Gtp600 Home Movie Theatre Dolby $269.00
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Prices current as of last update, 06/28/25 5:20pm.

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