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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These should hold up much better. Adcom uses hex screws and they can be difficult to break loose. Equipped with LEDs that notify you during thermal overload, the amp is user-friendly and features a adcpm power cord.

Ratings and Reviews Write a review. Etymotic ER3, the Audiophiliac affordable headphone of the year The Etymotic ER3 is a bona-fide audiophile headphone, aecom a very attainable price. Notice the pin-connector on the RCA input! Here’s how to get the most out of your AirPods, and a few things you may not know.

Some notes about restoring a GFA | Hoppe’s Brain

TVs by Geoffrey Morrison 4 days ago. Show More Show Less. Like a motor with a huge flywheel.

The amp is very high damping factor and very high current. Loved it all the way. This item doesn’t belong on this page. Here are the input boards, which contain the RCA and XLR input connectors, along with the circuitry for the first stage of the amp.


This Adcom GFA power amplifier is in fairly good cosmetic condition. I always replace power switches and relays just in case they are corroded over time. Classic Nelson Pass design in a watt giant killer that rivals Krell. The symptom was that I needed to turn the DC bias pot all the way to one side to get it to zero.

A new version of HDMI is coming, and there are some big avcom — including support for resolutions up to 10K as well as a new cable. Nice quality fiberglass through-holes. Trending Price New. Spotify, Apple Music and more, compared by Ty Pendlebury. This repair and restoration is complete. See details for description of any imperfections.

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I will definitely consider buying this amp again or gra-5802 to an audiophile who loves hi-end sound for less. Around the power FET’s It looks like something may have been spilled. Audio by Steve Guttenberg 9 days ago. The soundstage is very deep and the amplifier produces and very neutral, transparent sound. However, don’t worry about it yet. They have a afcom flat curve if they are biased heavily enough. Be careful as they are easy to strip.


Some notes about restoring a GFA-5802

Fortunately, these devices are still available, so I bought of them, built a jig to match them, and sorted out pairs that match to less than 1mV.

Adccom of the best kept secrets in audio. This amplifier is for audiophiles, clean crisp power, very detailed. You should let the amplifier warm up for an hour or so before adjusting. I measured WPC with both channels driven into 8 ohms, just before clipping. But its price is 5x less! Leave a Reply Cancel reply. It was manufactured around In particular, the uF 16V power-supply filters for the high-voltage supply are known to die and cause a loss of bass response.

ADCOM GFA – Power amplifier Overview – CNET

This item may be a floor model or store return that has been used. Very happy with this product. Get the service manual and set the idle current aecom spec. Online by Marrian Zhou 4 days ago.

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