Question about Amplifiers & Preamps

2 Answers

Gemsound EXA-3955 Right Channel Problem

Hey guys. I just bought a new Gemsound EXA-3955 amplifier and first time out of the box i plug it in and turn it on, and it works great. I dont turn it up too loud or change any wiring. Then I turn it on to show my friend the next day and the right channel wont work, and all i hear on that side is a low hum. Can anyone help me fix this problem. I checked all the wires and connections and they are all fine. Please help!

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Lol i bought a Gemsound EXA-3955 cheap then the right fan stoped working i replased it with a computer fan before i let it burn up it payed for it self and im still tacking it around with 2 18" folded horn im 18 years old this is not rocket science

Posted on Jan 16, 2011

You sure you didnt flip the bridge switch on the back? its the tiny little black switch under the bridge output plug, if you have it set to "bridged mode" any input sent into the right channel produces only a hum, only left channel input works.

Posted on Apr 04, 2008

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

The right side Pitch slider knob is broken on my GemSound CMP 1200 MIDI. Can it be repaired and what will it cost?

When you say "broken" do you mean the entire slider or just the knob? Because if it's just the knob, you can just take it to an electrical parts shop such as Maplin (UK) or Radio Shack (USA) and find something similar or that matches it. Ask the assistant if for help if you can't find it. If it will fit, but doesn't match, buy two so that you can match them up. They shouldn't be expensive.

If the controller is broken you might have to find a dealer who repairs that brand. As it's not a widely known brand you might have to pay a bit more, being less competition around.

Sep 18, 2013 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gemsound pa 1005 exa keeps shutting off

I Think that something like a transistor is getting hot and then shutting down. Exploring inside might solve the problem of what's getting really hot. You could even get some Servisol Freeze Spray, and wait for it to go off then spray it on the suspected part. That will cool it down and it should start up again. If it does come on, that part will have to be replaced.

Jun 28, 2012 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

No signal out of channel a

I would check the devices on the heat sink for that channel. They are the top culprits for the fault.

Mar 01, 2010 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gemsound xp-550

A diode/rectifer or voltage stabliser, or leaky capacitor in the power supply.
Also the main transistors in the power amp or if it has an output IC - that!
If you can in anyway disconnect the power supply section from the amp circuit, you can isolate which part is faulty. For if it blows when disconnected from the power amp, you know it's just the power supply that's gone. And if it does not blow - then it's the amp!

Aug 24, 2009 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gem sound exa 3950 amp

If it's a straight-up power switch then it will need to be replaced if it works off a relay then the relay is gone.


Mar 24, 2009 | Gem Sound GemSound PA-585 2-Channel...

2 Answers

Gem sound 3950

Dc problem in amplifier (short circuit) needs to be serviced

Jan 05, 2009 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

Gem Sound clipping problem

First of all the EXA-3940 is rated at 350watts per channel in to 8 ohms. The 1400 watts is bridged into a 4 ohm load. Second, the speakers can handle 1000Wats peak with an average of 600 continuous (i'm guessing). That tells me that the amp is underpowered for the speakers. The sensitivity of the amp is such that the mixer is overdriving the input stage. That is what is causing the clipping. If you are looking for more volume, you are probably better off purchasing another amp and running them in bridge mode, 1 per speaker cab. Be careful though, not to overdrive the speaker cabinets either.


Sep 21, 2008 | Gem Sound GemSound PA-585 2-Channel...

1 Answer


Contact Gemsound thru their email.

Sep 04, 2008 | Gem Sound GemSound PA-585 2-Channel...

1 Answer

My amp

where is your location my friend? did you check your amps power input requirements. you may be having the wrong voltage supplied to your amp. unless there is a defect on the amp unit you bought otherwise check your voltage settings first

Aug 11, 2008 | Amplifiers & Preamps

Not finding what you are looking for?
Amplifiers & Preamps Logo

Related Topics:

145 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts


Level 3 Expert

4590 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68301 Answers

Are you an Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides