Adcom GFA 555 mk2 — Serviced/Tested/Verified

For sale is the Adcom GFA 555 mk2. The amp has been repaired, upgraded, cleaned and tested.  The Adcom GFA 555 mk2 is rated at 200 watts per channel. In reality it produces 270 watts per channel at clipping. Please see the attached photos for the tests performed to confirm performance.

This amp will ship in its original box with a protective second box.

The amp has had many upgrades and maintenance performed. The work performed is listed below.

Here is a summary of the performance testing:
Power Output w/ 1khz sine wave
Left 270 watts
Right 267 watts
THD @ 100 watts 1khz sine wave
Left 0.001%
Right 0.001%

The following work has been performed on this unit:
Cosmetic:
Cleaned inside and out
Modern banana plugs have been installed to replace the dated speaker terminals
RCA jacks upgraded with stronger gold plated terminals
Overall condition is Excellent

Service:
Electrolytic capacitors replaced with audio grade equivalents
Matched pair replaced with thermally bonded modern equivalents
Bias adjusted
Fully tested

Specifications
Power output: 200 watts per channel into 8Ω (stereo), 600 watts into 8Ω (mono)
Frequency response: 10Hz to 20kHz
Total harmonic distortion: 0.04%
Damping factor: 800
Gain: 27 dB
Input sensitivity: 1.75V
Signal to noise ratio: 110dB
Semiconductors: 42 x transistors, 2 x zener diodes, 13 x diodes, 2 x IC, 2 x diode bridges
Dimensions: 7.3 x 17 x 12 inches
Weight: 35.25 lbs

Shipping:
Shipping is of paramount importance to the buying decision. Extensive efforts are made to ensure your purchase arrives without damage. Techniques used include heavy duty boxes, corner bracing, 2” foam encapsulation and expandable foam to protect front/back. Full insurance and signature requirements are also utilized. A DISCOUNT IS OFFERED FOR LOCAL PICKUP.

Additional Notes:
Physical Condition:  Each item is as described and images.  What you see in the images is exactly what we will ship.  We want you to know exactly what you are getting.  If you want additional/better images please ask and we will provide.

Customer Service:  Once your item arrives, if you have questions about how your item functions or proper settings, please CONTACT US.  We are audiophiles as well and love to help out other audiophiles.