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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 Digital Gtp-740 Ac-3 Tuner/Preamplifier - Needs Repair - Turns On - UsedAdcom Digital Gtp-740 Ac-3 Tuner/Preamplifier - Needs Repair - Turns On - Used $79.99 Adcom Gtp-450 Preamplifier, Nice !Adcom Gtp-450 Preamplifier, Nice ! $159.00
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 Gfp-1 Stereo Preamplifier High QualityAdcom Gfp-1 Stereo Preamplifier High Quality $300.00
Adcom Gtp-506 Tuner/ Preamp Tested!Adcom Gtp-506 Tuner/ Preamp Tested! $299.99 Adcom Gtp-350 Preamplifier /Tuner -Adcom Gtp-350 Preamplifier /Tuner - $199.99
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-740 A/V Preamplifier & Tuner Powers on and Functions workAdcom Gtp-740 A/V Preamplifier & Tuner Powers on and Functions work $230.00
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 Adcom Gtp-450 Tuner/Preamp (Ez5001564)Adcom Gtp-450 Tuner/Preamp (Ez5001564) $199.99
Adcom Gtp-500 Am/Fm Tuner Preamplifier Works PerfectlyAdcom Gtp-500 Am/Fm Tuner Preamplifier Works Perfectly $150.00 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-450 🔊 2 Channel Tuner Stereo Preamplifier Pre-Amp -Free ShippingAdcom Gtp-450 🔊 2 Channel Tuner Stereo Preamplifier Pre-Amp -Free Shipping $199.95 Vintage Adcom Gtp-502 PreamplifierVintage Adcom Gtp-502 Preamplifier $250.00
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-350 preamplifier tuner (For Parts Or Repair)Adcom Gtp-350 preamplifier tuner (For Parts Or Repair) $85.00 Adcom Gfp-1A Preamplifier (Only)Adcom Gfp-1A Preamplifier (Only) $300.00
Adcom Gtp 350 Stereo Tuner/Preamplifier and Gfa 5003 Stereo Power AmplifierAdcom Gtp 350 Stereo Tuner/Preamplifier and Gfa 5003 Stereo Power Amplifier $275.00 Adcom Gtp-450 Stereo Tuner/Preamplifier Parts/ Repair Only Tested for Power ReadAdcom Gtp-450 Stereo Tuner/Preamplifier Parts/ Repair Only Tested for Power Read $71.99
Dealer Pr New & Sealed Adcom Gfa565Se Amp & Gfp 915 preamp Dac Phono BluetoothDealer Pr New & Sealed Adcom Gfa565Se Amp & Gfp 915 preamp Dac Phono Bluetooth $2,589.00 Adcom Gsa-700 amplifier/preamp/processo r Looks Nice (See Video & Photos)Adcom Gsa-700 amplifier/preamp/processo r Looks Nice (See Video & Photos) $143.00
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 Channel Pre-Amp / Processor Amplifier - Used - Powers onAdcom Gtp-500 Ii 2 Channel Pre-Amp / Processor Amplifier - Used - Powers on $189.99
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
Adcom Gtp-550 Preamplifier Audio ProcessorAdcom Gtp-550 Preamplifier Audio Processor $110.00 Adcom Gtp-500Ii Tuner/preamplifier W/ Box & Some CordsAdcom Gtp-500Ii Tuner/preamplifier W/ Box & Some Cords $150.00
Adcom Gtp-500 Ii 2 restoration recap service kit repair filter capacitor rebuildAdcom Gtp-500 Ii 2 restoration recap service kit repair filter capacitor rebuild $135.00 Adcom Gtp-880 Preamp Tuner works Fine but has a bad displayAdcom Gtp-880 Preamp Tuner works Fine but has a bad display $295.00
Classic Adcom Gfp-710 Stereo PreamplifierClassic Adcom Gfp-710 Stereo Preamplifier $495.00 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 $163.51
Adcom Gtp-450Adcom Gtp-450 $125.00 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 $131.04
Adcom Gtp 400 Stereo Preamp NiceAdcom Gtp 400 Stereo Preamp Nice $350.00 Tube preamplifier Kit Diy for preamp Famous circuit 12Au7 /12Ax7 / 6dj8Tube preamplifier Kit Diy for preamp Famous circuit 12Au7 /12Ax7 / 6dj8 $82.48
Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v.Adcom Gtp-830 Surround Sound Processor Preamplifier 120/240v. $199.99 Adcom Gtp-600 5 Channel Pre-Amp/Processor AmplifierAdcom Gtp-600 5 Channel Pre-Amp/Processor Amplifier $190.00
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 Tuner Preamplifier Gtp 400Adcom Tuner Preamplifier Gtp 400 $89.00
Adcom Gtp-502 Stereo Tuner/PreamplifierAdcom Gtp-502 Stereo Tuner/Preamplifier $209.00 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
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-400 Pre-Amp Preamplifier Am/Fm Tuner, With Cd-Phono-Tape ProcessorAdcom Gtp-400 Pre-Amp Preamplifier Am/Fm Tuner, With Cd-Phono-Tape Processor $124.99
New ListingAdcom Gtp-506 Stereo Tuner/PreamplifierNew ListingAdcom Gtp-506 Stereo Tuner/Preamplifier $244.99 Adcom Gfp-715 Preamplifier PreampAdcom Gfp-715 Preamplifier Preamp $300.00
Adcom Gtp-500 Am/Fm Tuner Preamplifier, Tested WorkingAdcom Gtp-500 Am/Fm Tuner Preamplifier, Tested Working $200.00 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-565 PreamplifierAdcom Gfp-565 Preamplifier $325.00 Adcom Gfp-555 Ii Stereo Pre-AmplifierAdcom Gfp-555 Ii Stereo Pre-Amplifier $233.75
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Prices current as of last update, 05/28/25 6:50pm.
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