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Adcom GFP-555

Stereo Pre-Amplifier (1986)

add a review (3 reviews)

Adcom GFP-555


Frequency response: 5Hz to 85kHz

Total harmonic distortion: 0.003%

Input sensitivity: 2.3mV (MM), 200mV (line)

Signal to noise ratio: 90dB (MM), 100dB (line)

Channel separation: 75dB (line)

Output: 2V (Pre out)

Dimensions: 432 x 289 x 76mm

Weight: 5.2kg



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Reviewed Jul 10th, 2017 by Bronco2011

This pre amplifier is not my cup of tea. It sounds very analytical, unnatural and not coherent. It didn't grab at all, I found it lacks musically swing. My Harman Karton AP2500 may have a lack of inner details, but it sounds far more coherent and possessed a natural musically swing. Maybe the Adcom doesn't mix well with the Bryson 3b power amp. Anyhow, I wasn't impressed with the Adcom FGP-555 at all.

Reviewed Mar 23rd, 2014 by TONY_C

I bought the preamp used last year for $150.00. Best money I ever spent on my system, super quiet, great phono section. I use this preamp with my rebuilt EICO HF-35 35watt tube monoblocks and the soundstage is amazing.

Reviewed Jul 31st, 2013 by Jazzyguy

GREAT Preamp I've had mine for 30 years.



re: GFP-555

Replace ALL the capacitors with good ones including the tone control caps and you might be surprised just how good this very old preamp can sound.

puptent's picture

re: GFP-555

The ADCOM 555II is one of the best "bang for your buck" pre-amps out there. Check ebay for bargains. I've had zero problems in all the time I've owned it, about ten years. I think about upgrading to a "6" series from time to time, but there really is no need.

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