hifi engine

Manual Library / Adcom

Adcom GFP-555

Stereo Pre-Amplifier

add a review (2 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


II service manual   English -

service manual   English -

If you have any problems opening files please read the download FAQ. All files are provided under strict licence and reproduction without prior permission or for financial gain is strictly prohibited.

If you have additional documentation please consider donating a copy to our free archive.


 Login or register to post reviews

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.



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.

This website is not affiliated with or sponsored by Adcom. To purchase GFP-555 spares or accessories, please contact the company via their website or visit an authorised retailer.