Question about Adcom GFA-5500 2-Channel Amplifier

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Adcom GFA 5500 right channel emits horrible sound. Broken highs and no bass. Is is repairable by a semi amatuer?

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Adcom makes a great amplifer! Usually broken highs and no bass means blown speaker. Try hooking it up to a completely different input source. Try different speakers also. If problem persists, check the fuse. Most will have a fuse on the back you can screw out. Some have two fuses (one for each channel) If this doesn't fix the problem it could be expensive to fix. Also, does this model ave the thermal protection light and if so, does it come on at all?

Posted on Jun 23, 2009

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I had a similar problem with a faulty capacitor. Clipped bass and strange static was worse at higher volumes. It may be in your speaker or in the amplifier. Search bad capacitors on google for examples . If they are bulged on the top they are bad. Simple fix if you can get to them.

Posted on Sep 19, 2009

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1 Answer

Bridge adcom gfa-5500


not unless it has a Bridge switch OR you design an inverter circuit for one of the inputs. If it has XLR inputs you can try to invert pins 2 & 3 on one of them, that might work...

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Adcom GFA 7500 problems


My right channel went out on my GFA 7500 and the problem was TWO blown internal fuses. Each amplifier inside the GFA 7500 has two fuses. In order to get to the fuses you must first take the top of the amplifier off by removing the screws using an allen wrench. Then put the top back on.Turn the amplifier over and remove most of the screws from the bottom to access the fuses in the bottom of the amplifier. There are two different size allen wrenches on the bottom. Be careful to not drop a screw inside the amp and make sure you line up the screw holes that hold the amps using a small screw driver to push the amps into position. I replaced all the fuses on the top and the bottom. AdCom sells the fuses on their site.

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2 Answers

Adcom GFA 5500 'mechanical' hum from amplifier


Possibly. Most amps filter out line hum via low-pass filters. If you can locate a schematic, those would be the caps to check.

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1 Answer

Adcom GFA-7400 power amp; 1 dead channel (thermal protect LED on)


Hi...

I've contacted ADCOM before and they sent a pdf of the electricals

http://www.adcom.com/default.aspx

also try:

www.stereomanuals.com

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1 Answer

Whent turn up the valume sound whit no power


I would contact Adcom for a service place near you

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1 Answer

I looking for fuse for ampli gfa 5500 adcom


go to radio shack near you and change the fuse with the same rate-------or any electronics store near you.

Nov 24, 2009 | Adcom GFA-5500 2-Channel Amplifier

1 Answer

I turn on the ADCOM GFA-5802 amplifier... ...The power light comes on, but does not heat up nor output sound


Have it serviced. Do you know what GFA stands for. People at Adcom do have a great sense of humor. Take it only to a high end audio servicer. Contact Adcom. This is good stuff you wouldn't want a hack working on it.

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