Question about Adcom GTP-760 Amplifier

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No remote found

Anyway to use the Adcom Gtp- 760 if there is no remote? Unit is always in stand by mode.

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Re: No remote found

If pushing the power button does nothing, the unit is probably in "protect mode". This means there is an internal problem and will require professional service.

Posted on Oct 10, 2007

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I have a Adcom GTP=600PreAMP.Will this unit run a Gfa=5500 and a Gfa=535 Amp at the same time? I need to power Peavey 15's and 12's,and Peavey Horns, which are all each in there own Cabinets? HELP?

Should not be a problem, just bridge them together from the Pre out.
It´s all a question of impedance matching, but just 2 amps in parallel is no sweat. Then adjust volumes on the Amps.
Low frequencies will FRY THEM !!!
Be good.

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check they have flt rate service for that model.

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ADCOM7500 how to use it?

Good gift. It is a 5 channel power amplifier and I do not recommend to connect any sources directly to it. Now you need to buy a preamplifier/ receiver from Adcom GTP series or other brand to connect you dvd player, cd player, cable box, playstation etc. you need 5 good speakers to get your surround sound (or 2 for stereo)

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Hello, My ADCOM GTP-870 HD has recently started cutting signal randomly. I'll watching a movie and all of a sudden I hear a click, and no sound or picture and the front panel had no lights . The power...

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections as a root cause for intermittent shutdown.

Feb 27, 2011 | Adcom GTP-870HD 7.1-Channel Amplifier

1 Answer

My Adcom GTP 760 Preamp/Processor produces a hum that is affected by the volume control. I think it must be a bad capacitor in the power supply but would like your opinion. I do not have a tech manual...

This is not likely a power supply problem, but is isolated before the pre-amp stage. This can be a defective IC in the preamp stage as well.

Adcom schematics are not generally available, but you may be able to isolate the problem with a little experimentation. Try to run a signal through to see if you can get the signal as well.

Please update this with your results.


Aug 17, 2010 | Adcom GTP-760 Amplifier

1 Answer

Recently, after about an hour of play, when my Adcom GTP-760 is warm, a low level hum begins and can be heard on all channels regardles of the source selected. The hum cannot be heard when the unit is...

The filter capacitors are probably going bad is the likely cause.

It may also be bypass capacitor in the preamp section.

Noting whether the hum volume varies with the setting of the volume control would aid troubleshooters.

One might be able to isolate the bad component with freeze mist/circuit cooler.

Apr 21, 2010 | Adcom GTP-760 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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I have a GRC 815 remote for sale : email me, me can work it out

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Have you tried swapping speakers to see if the trouble moves to the other speaker?
It could be a dirty selector switch .

It could be a broken solder contact on the input or output RCA jacks

Feb 07, 2009 | Adcom GTP-760 Amplifier

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