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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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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 $109.99 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 Gfp-915 Stereo Preamplifier Demo ModelAdcom Gfp-915 Stereo Preamplifier Demo Model $875.00 Adcom Gtp-450 Tuner Preamplifier Pre-Amp Radio Am/Fm Tested and WorkingAdcom Gtp-450 Tuner Preamplifier Pre-Amp Radio Am/Fm Tested and Working $179.00
Adcom Gtp-500Ii 2 Channel Pre-Amp/Processor Amplifier Pre-ownedAdcom Gtp-500Ii 2 Channel Pre-Amp/Processor Amplifier Pre-owned $199.99 Adcom Gtp-400 Pre-Amp Preamplifier Stereo Tuner Processor Am/FmAdcom Gtp-400 Pre-Amp Preamplifier Stereo Tuner Processor Am/Fm $119.95
Adcom Gtp-506 Tuner/ Preamp Tested!Adcom Gtp-506 Tuner/ Preamp Tested! $299.99 Vintage Adcom Gtp-750 Digital Av Tuner/Preamp 5.2Vintage Adcom Gtp-750 Digital Av Tuner/Preamp 5.2 $165.00
Adcom Gtp-450 Tuner/Preamp (Ez5001564)Adcom Gtp-450 Tuner/Preamp (Ez5001564) $199.99 Adcom Gtp-500 Am/Fm Tuner Preamplifier Works Nice With Remote Made In UsaAdcom Gtp-500 Am/Fm Tuner Preamplifier Works Nice With Remote Made In Usa $388.00
Adcom Gfp 565Adcom Gfp 565 $399.00 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 Model Gfp-565 Solid State High Performance Stereo Preamplifier TestedAdcom Model Gfp-565 Solid State High Performance Stereo Preamplifier Tested $499.00 Adcom Gfp-555Ii Preamplifier Power TestedAdcom Gfp-555Ii Preamplifier Power Tested $199.99
1986 Adcom Gfp 555 Preamplifier Tested Working Made In Usa1986 Adcom Gfp 555 Preamplifier Tested Working Made In Usa $299.99 Classic Adcom Gfp-710 Stereo PreamplifierClassic Adcom Gfp-710 Stereo Preamplifier $395.00
Adcom Gtp-450 2 Channel Pre-Amp/Processor Amplifier with remoteAdcom Gtp-450 2 Channel Pre-Amp/Processor Amplifier with remote $179.95 T8 6n3 Digital Tube Preamplifier Bluetooth 5.0 Hifi Headphone Preamp Decoder PreT8 6n3 Digital Tube Preamplifier Bluetooth 5.0 Hifi Headphone Preamp Decoder Pre $135.78
Adcom Gtp-350 Stereo Tuner / PreamplifierAdcom Gtp-350 Stereo Tuner / Preamplifier $159.00 Pyle Rack Mount Studio Pre-Amplifier - Audio Receiver System w/ Digital Lcd DPyle Rack Mount Studio Pre-Amplifier - Audio Receiver System w/ Digital Lcd D $112.99
New ListingAdcom Gfa-7300 5 Channel Amplifier Vintage<!-F/->New ListingAdcom Gfa-7300 5 Channel Amplifier Vintage $265.00 Adcom Gtp 400 Stereo Preamp NiceAdcom Gtp 400 Stereo Preamp Nice $350.00
Adcom Gtp-350 preamplifier tuner (For Parts Or Repair)Adcom Gtp-350 preamplifier tuner (For Parts Or Repair) $55.25 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 Preamp Vintage Used No Remote Tuner Not WorkingAdcom Gtp-500 Ii Preamp Vintage Used No Remote Tuner Not Working $199.00 Adcom Gtp-830 A/V PreamplifierAdcom Gtp-830 A/V Preamplifier $125.00
Adcom Gfp-1 Stereo Preamplifier High QualityAdcom Gfp-1 Stereo Preamplifier High Quality $299.99 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 Gfp-1A Preamplifier Pre-ownedAdcom Gfp-1A Preamplifier Pre-owned $339.00 Adcom Gtp-602 Am/Fm Stereo Preamplifier / With Mm Phono & Remote ControlAdcom Gtp-602 Am/Fm Stereo Preamplifier / With Mm Phono & Remote Control $28.00
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 500 Stereo Preamp Tuner Excellent Condition WhiteAdcom Gtp 500 Stereo Preamp Tuner Excellent Condition White $195.00
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 Gtp-600 Tuner Preamplifier Used Tested & Works.Adcom Gtp-600 Tuner Preamplifier Used Tested & Works. $275.00
Adcom Gfp-1A Preamplifier (Only)Adcom Gfp-1A Preamplifier (Only) $300.00 Adcom Gtp-350 Preamplifier /Tuner -Adcom Gtp-350 Preamplifier /Tuner - $199.99
Douk Audio P1 Vacuum Tube Bluetooth Preamplifier, Ge5654 Audio Preamp, Hi-FiDouk Audio P1 Vacuum Tube Bluetooth Preamplifier, Ge5654 Audio Preamp, Hi-Fi $139.99 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
Adcom Gtp-600 Surround Sound Tuner Preamplifier - As IsAdcom Gtp-600 Surround Sound Tuner Preamplifier - As Is $169.00 Adcom Gtp-350 Stereo Tuner/Preamplifier and Gfa 535Ii Power AmplifierAdcom Gtp-350 Stereo Tuner/Preamplifier and Gfa 535Ii Power Amplifier $349.00
Adcom Gtp-500 Ii Am/Fm Tuner / Preamplifier Made In Usa! *Tested See Video!Adcom Gtp-500 Ii Am/Fm Tuner / Preamplifier Made In Usa! *Tested See Video! $205.99 Adcom Slc-505 Straight Line Controller Passive PreamplifierAdcom Slc-505 Straight Line Controller Passive Preamplifier $149.99
New ListingAdcom Gtp-600 Home Theater Stereo Preamp Preamplifier (No Remote)New ListingAdcom Gtp-600 Home Theater Stereo Preamp Preamplifier (No Remote) $125.00 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 Gtp-450 PreamplifierAdcom Gtp-450 Preamplifier $199.00 Early 90's Adcom Gfa-535 Power Amp & Gtp-500 Preamp - Tested and WorkingEarly 90's Adcom Gfa-535 Power Amp & Gtp-500 Preamp - Tested and Working $324.99
Adcom Gtp-500Ii 2 Channel Pre-AmpProcessor Amplifier & TunerAdcom Gtp-500Ii 2 Channel Pre-AmpProcessor Amplifier & Tuner $215.00 Adcom Gtp-550 Preamplifier Audio ProcessorAdcom Gtp-550 Preamplifier Audio Processor $110.00
New ListingAdcom Model Gtp-500Ii PreAmplifier/Tuner Working TestedNew ListingAdcom Model Gtp-500Ii PreAmplifier/Tuner Working Tested $169.95 Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v.Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v. $199.99
Vintage Adcom Gtp-502 PreamplifierVintage Adcom Gtp-502 Preamplifier $250.00 Vintage 1990s Adcom Gtp-400 Stereo Preamplifier Am Fm Tuner Preamp w/ Phono InVintage 1990s Adcom Gtp-400 Stereo Preamplifier Am Fm Tuner Preamp w/ Phono In $26.00
Adcom Gtp-450 Tuner Preamplifier Pre-Amp Radio Am/Fm - No RemoteAdcom Gtp-450 Tuner Preamplifier Pre-Amp Radio Am/Fm - No Remote $159.95 Nice Adcom Gfa-5802 Stereo Amplifier Original Owner's Manual & Warranty CardNice Adcom Gfa-5802 Stereo Amplifier Original Owner's Manual & Warranty Card $49.99
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Prices current as of last update, 07/23/25 1:20pm.

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