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Adcom GFP-565 2 Channel Pre-Amp/Processor Amplifier

4.4719 product ratings

braneske-0 (1)
100% positive feedback

Price:

$450.00

Free shipping

Estimated delivery Thu, May 9 - Mon, May 13

Returns:

30 days returns. Buyer pays for return shipping.

Condition:

Used

Experience superior sound quality with the ADCOM GFP-565 preamplifier. This American-made unit features 7 audio inputs, including PHONO, CD, TAPE 1, Video/Aux, TAPE 2, Analog, and Signal Processor, and 6 stereo L/R RCA outputs, allowing for seamless connectivity with your existing home audio system. The GFP-565 also supports FM and AM radio modes and comes in a sleek black design. With its numerous features and high-quality construction, this unit is sure to elevate your audio experience.

About this product

Product Information

The Adcom GFP-565 2-channel pre-amp/processor amplifier is designed to compete with any high-end pre-amps on the market. This unit offers a unique setup with three sets of outputs and loud, crisp surround performance for bypass, main outputs lab, and main normal that allow you to easily choose the voltage to provide to speakers and to control tones or, alternately, to enjoy an unfiltered bypass. They use a direct path, and linear gain circuitry within the device helps to further improve its sound purity and performance. In addition, there are six inputs provided on the GFP-565, including phono, CD, tuner, tape 1 and 2, and video/aux via cables. There are separate selector switches that are provided for listening and recording, and since two tape outputs are also included, tape copying in either direction is possible. The 565 does not have an infrasonic filter for the phono. The Acoma GFP-565 2-channel processor amplifier has extremely robust power amplifiers that are capable of operating at a very low impedance of 2 ohms and can manage difficult speaker loads thanks to its 20 rugged output transistors. It was designed around a triple Darlington configuration and uses no protection or current limiting circuitry other than the fuses itself in the DC supply voltage rails. This sound system could be considered monster speakers as they are very powerful, delivering a massive sound, yet have really balanced acoustics. They are rated at 300 watt output for 8 ohms (24.8 decibel watts), 450 watts into 4 ohms (23.5 decibel watts), 850 watts into 2 ohms (23.3 decibel watts), and all 20 hertz to 20 kilohertz at 0.02 percent. They have an impedance of 50,000 ohms and an input sensitivity of 2.15 volts for rated output. Their full output is greater than 106 decibels, their damping factor is greater than 1000, 8 ohms, 20 hertz to 20 kilohertz, and they have a dynamic headroom (at 4 ohms) of 1.6 decibels. The bypass outputs will let you use an external processing loop, and a mono switch and loudness contour help your sound bypass outputs, but the contour switch and its associated filter components are connected to a tap on the volume control, so these components and switch contacts are not in the signal path. Designed as a solid-state monoblock power system, it uses one very large, beer-can-sized capacitor. It also consists of a high-quality, X2-type snubber capacitor, which is installed across the AC input to reduce RF interference and reduce noise. This amp, even when driven hard and heated up close to maximum, shows no signs of distress. It should cool itself down quickly too. ADCOM made its name in the boom-box days of the ’80s with this type of speaker, offering a truly high-performance audio system for the mass market. They were leaders in developing semiconductor technology, which was accelerating along with fabrication technology. But it’s not just about volume. This sound system will please the purist audiophiles as well as all those who require the abilities of full-featured speakers, such as electric guitarists. The ADCOM GFP-565 2-channel audio system will offer years of quality use in its clean, solid, and secure system.

Product Identifiers

Brand
ADCOM
MPN
GFP-565
Model
GFP-565
eBay Product ID (ePID)
73207449

Product Key Features

Number of Channels
2

Additional Product Features

Type
Preamp/Processor

4.5

4.5 out of 5 stars based on 19 product ratings

19 product ratings

12 users rated this 5 out of 5 stars
5 users rated this 4 out of 5 stars
1 users rated this 3 out of 5 stars
1 users rated this 2 out of 5 stars
0 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 16 reviews

4 out of 5 stars
by raw7145May 19, 2016
Top favorable review
Very good...for the price.
When talking of ADCOM stereo equipment, you are transported to the 70's. Here the ADCOM reigned supreme like status. For its price. That is not saying more expensive is better. This is far from the truth. The ADCOM GFP 565 Pre-Amp made sure of this. The GFP 565 2, relays no difference. Known for their superb sound, the music reproduction from these units are very very good. Although it does lack the more serious level of spaciality. The sound is true. More the signal is true. However they do, did it, ADCOM got it right with the GFP units. These pre-amps makes sure your speakers put out one of the most exact replicas of music sent to it. Crisp highs, very decent vocals, and bass notes. Maybe the bass notes are not quite as hearty as could be, but again, we are talking...for the Money! You may be taken aback when hearing one, but you won't "take it back!"Read full review
Verified purchase: Yes | Condition: Pre-owned
3 out of 5 stars
by hockeyjack-aApr 12, 2024
Top critical review
Looks nice, not fully functional
Disappointed to find the phono input doesn’t work correctly. A lot of distortion. I know it’s not my phono as it works fine through other sources.. The cd and tape inputs seem to work fine. I need to find a place to get it serviced. The chance you take buying without being able to audition.
Verified purchase: Yes | Condition: Pre-owned
4 out of 5 stars
by cedarstone1Apr 08, 2010
Adcom GFP 565 Amplifier Worth the money if serviced
The Adcom GFP is a very powerful amp with power to burn. Dynamically it is excellent, sound stage very good and paired with the right equipment hard to beat. It does however have its issues. It is a very layed back amplifier, using a tube preamp or bright/warm preamp is a must. I paired a set with a c-4000 carver. It sounded ok (more dynamic but less highs)but the Adcom 5500 sounded better. Paired with the music angle preamp seemed to really bring them out. These amps have another huge issue with their electronics. The capacitors for many of these units (and the GFP 585) have poor quality caps. They are well know for leaking and toasting speakers (smoke etc). Even never used ones have leaked while still in there boxes. One tech I talked to said not to turn them on have them checked first (very common problem). If you are going to purchase these amplifiers Make sure they are recapped. The service is about 190 at this time per amp (240+ for gfp 585) and this will save you a lot of money in speakers. Over all these are a good reliable amplifier if they have been serviced. The sound quality is very good and worth the money.Read full review
5 out of 5 stars
by felix_the_katMay 29, 2013
Sonically clean, very reliable and moderately priced audio equipment.
It'a an Adcom; for those familiar with the product, little need be said. I have another that I have been using for decades. It lives up to its reputation of being a sonically neutral preamplifier, state of the art as is said by many and at a reasonable price. At the time this purchase was made, I also made purchase of three vintage Adcom power amps. These recent purchases are intended for use with an electronic crossover to experiment with speaker and crossover designs without having to tap into the main systems of which there are four. I design speaker systems. Perks are the hi & lo mag phono inputs which have been excluded from most recent preamps and receivers. That also includes two tape input & output loops and a switchable signal processor loop, such as an equaliser. The only problem experienced was whan a static discharge, created by me when inserting a jack, blew out one of the input buffers. Adcom labels them as AD-n, where n is a digit. Knowing it was an op-amp, the trick was to find an equivalent replacement. Thanks to an article I found in an audio BBS, short order was made of that search and several were purchased. Prior to acquisition of the first preamp & power amp by Adcom, a friend loaned me his preamp and it was compared to a vintage (1970's) top-of-the-line solid state preamp, fully restored by me with better caps, the phono stage caps especially were replaced with silver mica caps. The improvement was impressive until that vintage amp was compared to the Adcom. I still have that old preamp for nostalgic reasons; I'm somewhat of a collector better referred to by my friends as a pack rat extraordinaire. Would I get more Adcoms? Definitely, if and when I need more. I'm not one to fall into the hype trap associated with rediculously priced audio equipment which also includes cables and interconnects.Read full review
5 out of 5 stars
by vinnieguitarJun 28, 2017
Adcom GFP-565 preamp
Very transparent. As you increase the volume, the tone circuit effect is reduced. Manually decreasing bass and treble is usually what you do when changing volume from low to high. Nice feature!
Verified purchase: Yes | Condition: Pre-owned

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Picture 1 of 7

Adcom GFP-565 2 Channel Pre-Amp/Processor Amplifier

About this product

Product Information

Product Identifiers

Product Key Features

Additional Product Features

Ratings and Reviews

Most relevant reviews

Very good...for the price.

Looks nice, not fully functional

Adcom GFP 565 Amplifier Worth the money if serviced

Sonically clean, very reliable and moderately priced audio equipment.

Adcom GFP-565 preamp

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Pyle Pro PP444 Ultra Compact Phono Turntable Pre Amplifier

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