Question about Adcom GFA-5802 2-Channel Amplifier

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Can you bridge an adcom GFA-5802 power amp?

I own 2 adcom 5802s. I would like to buy 2 more and bridge them to run 1 per speaker just to power low frequency drivers. Is it possible?

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Running an amp in bridge mode requires a specific circuit design. It is not possible to combine 2 amps in this fashion.
Dan

Posted on Mar 02, 2009

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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.
BE CAREFUL THOSE HORNS HAVE CROSSOVERS, THOUGH !
Low frequencies will FRY THEM !!!
Be good.

Jun 07, 2015 | Audio Players & Recorders

1 Answer

I want to bridge 2 adcom GFA 555 amps to my sony DA7ES any suggestions


Obviously you are going to use the Front pre-out's on the Sony to drive the Adcoms. its pretty straightforward, just do not use a speaker that is less than 8 ohms. and make sure that you always have the power switch off on the adcoms, let them sit off for 5 minutes, THEN hit the bridge switch on the back of the adcom's and follow their instructions for bridging. it's pretty easy and tough to go wrong. Good luck...Rob

Apr 18, 2015 | Adcom GFA555 Amplifier

1 Answer

Adcom amp 5802 running hot


It should run hot to touch at idle, about 120F, because it is MOSFET type amplifier.

Mar 23, 2013 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

How do you connect wiring to bridge an adcom gfa 5300?


The manual does not specify a bridging option.

http://www.audioreview.com/cat/amplification/amplifiers/adcom/gfa-5300/prd_116265_1583crx.aspx

"Weaknesses:
Not bridgable."

Generally an amp that IS bridgeable uses the positive speaker terminals and some switching method to tell the unit to run as bridged. This is NOT a recommendation to try it on the 5300.

Aug 02, 2011 | Adcom GFA-5300 2-Channel Amplifier

1 Answer

Is a Adcom GFA-7500 5 channel power amplifier bridgable?


no this AMP is not bridgable to get more power out of this amp you need 4 ohm speakers.

Power rating
1 - 150 watts into 8 ohm speakers
1 - 225 watts into 4 ohm speakers

Feb 23, 2011 | Adcom GFA-7500 5-Channel Amplifier

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.

Apr 24, 2010 | Adcom GFA-5802 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.

Nov 23, 2009 | Adcom GFA-5802 2-Channel Amplifier

1 Answer

How do i bridge an adcom gfa 5400


This amp is not designed to be bridged and can not be used in the mode you wish. Sorry, but internal circuit changes would be necesary for the amp to work as a single channel.

Dan

May 01, 2009 | Adcom GFA-5400 2-Channel Amplifier

4 Answers

ADCOM GFA 5802 POWER AMP NO SOUND, BUT POWERS UP.


Remove the output transistors and measure each of the sets of 3 pads and report the voltage readings here. I suspect that you have either a blown driver circuit or output transistors. The voltage readings will give me an idea on where to start looking for specifics.

Thanks,
Dan

Nov 11, 2008 | Adcom GFA-5802 2-Channel Amplifier

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