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The Adcom GFA was designed for Adcom by Nelson Pass leveraging the International Rectifier HexFet T03 output devices. Nelson Pass designed these. I am considering changing(up grading)to Adcom GFA amp and GFP pre. I currently am using a Parasound HCAa and. ADCOM GFA – Power amplifier overview and full product specs on CNET.

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Also, the white cube is a gfa-58802 power relay, rated at 16A versus the original 12A. The service manual will also tell you how to adjust the DC offset. Get the service manual and set the idle current to spec.

Be respectful, keep it civil and stay on topic. Highly recommended for all speakers but superb on electrostatic. Spotify, Apple Music and more, compared by Ty Pendlebury. It would gfq-5802 ironic to use fancy, expensive RCA cables, when there is this weedy little push-pin connector on the inside.

The king of the budget sound bars The king of the budget sound bars by Ty Pendlebury.

Adcom GFA Power Amplifier – Repair And Restoration

However, don’t worry about it yet. TVs by Geoffrey Morrison 4 days ago. The amp is very high damping factor and very high current.

The amp was highly reviewed by most audio magazines and I’ve owned gfa-55802 for many years along with other quality amplifiers. This repair and restoration is complete. But its price is 5x less! This device delivers when it comes to highlighting every sound, adckm, and rhythm with a high-quality product that offers dB signal.


Rivals the best gfa5802 A amplifiers without spending too much money. A significant step up from their classic watt GFA Discussion threads can be closed at any time at our discretion.

Previous Post Sneak preview: One of the best kept secrets in audio. Hooked to my subwoofer, it was utterly unconcerned with the large current demands, and delivered tight, effortless bass as a matter-of-fact.

Classic Nelson Pass design in a watt giant killer that rivals Krell. What you need to know A new version of HDMI is coming, and there are some big changes — including support for resolutions up to 10K as well as a new cable. Show less Show more. This restoration was more of a tune-up as this Adcom GFA power amplifier is only about 15 years old. See details for description of any imperfections. Good value for money Loved it all the way.

Its a nice unit with lots of power. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This top-of-the-line watt amp rivals the mighty Krell which I also own in its clean power and transparent sound.

The soundstage is very deep and the amplifier produces and very neutral, transparent sound. Show More Show Less. Like a motor with a huge flywheel.

ADCOM GFA-5802 – Power amplifier

It was manufactured around We delete comments that violate our policywhich we encourage you to read. With the top cover removed you can see why this Adcom can produce over watts per channel into 8 ohms and watts into 4 ohms.


Adcom uses hex screws and they can be difficult to break loose. I measured WPC with both channels driven into 8 ohms, just before clipping. Trending Price New.

Two of these mosfets had actually lost some gain, possibly due to heat stress, so I replaced them. I always replace power switches and relays just in case they are corroded over time.

The symptom was that I needed to turn the DC bias pot all the way to one side to get it to zero. Lowered distortion means smoother, richer sound, and watts of power per channel creates a symphony of sound whether you play your favorite songs or turn on a movie.

Most relevant reviews See all 6 reviews. I will definitely consider buying this amp again or recommend to an audiophile who loves hi-end sound for less. Headphones by Steve Guttenberg 9 days ago. These wireless headphones beat out AirPods on sound quality These wireless headphones beat out AirPods on sound quality by David Carnoy.

Around the power FET’s It looks like something may have been spilled. People who bought this also bought.

Tfa-5802 how to get the most out of your AirPods, and a few things you may not know. These were found to be off by quite a lot, perhaps due to heat stress.