Question about Amplifiers & Preamps

1 Answer

Intermitant loss of sound on right channel

This fault has been looked at by BBTOAST.
But no joy so far..he has told me to test with metre. comparing results with good left channel.
But because the fault is not permanent. wel its confusing?
I put amp on yesterday and the right channel had a little sound but very low. when i turn up the volume i get crackling in the speaker then all of a sudden the sound comes on, and works fine, after a bit it fades out
there must be a simple fault with this amp.
has anyone had simular fault..please help

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert who has answered 20 questions.


    An expert that hasĀ over 10 points.


    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 54 Answers
Re: intermitant loss of sound on right channel

More than likely the final amp chip needs replaced,and or may be a cold solder joint on the chip amp. GOOD LUCK

Posted on Jan 17, 2008

Add Your Answer

0 characters

Uploading: 0%


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


3 Points

Related Questions:

1 Answer

Why i can hear faint sound on my mixing amplifier

Depends on what sound it is. If it's a hum, then it could be a fault. If the hum is on one channel then the place to look is that channel. You can compare the good channel with the bad one for clues as to what.
If it is in both channels then you are looking at the power supply. Or something common to both channels.
Hum is most often caused by Electrolytic Capacitors.
Crackling noises are caused by resistors, or transistors, or IC's.

Jul 01, 2016 | Amplifiers & Preamps

1 Answer

Hi i have a rotel ra-610 amplifier and am having intermitent static on the right hand channel only how do igo about fixing it?

I would prod and poke the channel with an insulated screwdriver this will cause buzz sounds. This should find the cause of the problem. Remember that the left hand channel is identical so you can compare the right with the left. For example if you get a weird buzz on the right when you touch it, but not on the left at the same point you might have found the faulty part.
Don't go near the power supply section as it's nothing to do with that the fault.

Sep 29, 2014 | Amplifiers & Preamps

1 Answer

Quad 33 chanel bad sound when playing music

As you know that the right is good you can compare that with the left. First look around for burnt resistors or damaged parts.

The next thing to do is with an insulated tool poke the two channels to see what buzz sound each channel makes. You should quickly find the distortion section with this method.

Mar 07, 2014 | Quad Amplifiers & Preamps

1 Answer

Hi ! I have a Mc Intosh MC352 and my problem is that I have it hooked up with my B&W 802s. And i notice one side is louder than the other. I checked my Wires an everything seem s fine. What's the...

Swap the speakers around. If the sound stays on the same channel and doesn't move with the swap, then the amp has a fault on that channel. If it does move to the other side the speaker is the problem.

If it is an amp fault you can track it down using a insulated tool and the buzz test. You simple touch points on the good channel with the tool and in places it will buzz. You compare that by touching the same places you got a buzz (on the good channel) on the bad channel instead and if it doesn't buzz or it's weaker then you have located the problem.
You can also check the voltages with a meter in the same way. As the voltages should be the same on the two channels.

Aug 25, 2010 | Mcintosh MC352 Amplifier

1 Answer

Technics su-z250 left chanel is not working

You need to determine if the fault is in the pre-amp section or power amp part. Look around for damaged or burnt parts. If you turn up the volume on the left channel and you hear a weak signal then the pre-amp will be OK. If not then start with that section. Remember the right channel will be the same as the left so compare the parts. If it looks odd in the left it might be the faulty part!
You can apply the Buzz test! Being careful not to touch the power supply parts, touch the two channels in various places with a srewdriver. On the right you should get a buzz showing the signal is there, so touch the left in the same place! And so on...PS don't short anything with the screwdriver!

Jan 02, 2010 | Technics Amplifiers & Preamps

1 Answer

My denon amplifer was playing okay then the trebel

Determine if it is both left and right channels. If it is then you are looking for something that is common to both channels as the cause. It could be something to do with the tone circuit, perhaps an IC, another suspect is the bias section. And if only in one channel then at least you have something to compare it when seeking the fault.

Oct 08, 2009 | Amplifiers & Preamps

1 Answer

Marantz Pm-7200 left channel weak compared to the right

hmmm. Let's start by swapping the wires you are using for your speakers. Double check the wire connections first, then take the left and place iton the right and vice versa.

May 05, 2009 | Marantz PM7200 2-Channel Amplifier

1 Answer

Sound from left channel is small and distorted.

The distortion might be caused by a resistor. The loss of volume could be the capacitors, but you could try injecting signals into the transistors to see if any has gone. They can cause the distortion and loss of signal. If you apply a soldering iron to any part it will heat up quicker, or you could also use a hairdryer for the whole thing. You can also get a freeze spray that cools things that have heat sensitive faults (available from electronic parts shops).

Apr 24, 2009 | Marantz PM-15S1 2-Channel Amplifier

1 Answer

Left channel volume is very faint as compared to the right channe

It sounds like the preamp section is working but the power amp is not. Look at the power supply section and see if it is getting power to the power amp and if ok check the power transistors or IC.

Feb 13, 2009 | Yamaha Amplifiers & Preamps

1 Answer

Muffled/bad sound on 1 channel of Marantz PM4400 amplifier

Go directly to the main amp, follow the leads from the speaker terminals. And you should find something on an heatsink. If there are two transistors see if they are running hotter than the other channel. If you see any damage to them (compare with good channel) replace both!
If all you see is a black box with pins coming out of it you need to replace that. They sometimes have the letters STK on them.
Replace both types with the letters and numbers of the same type. IE 2SC 1220 or STK 589.

Dec 17, 2008 | Amplifiers & Preamps

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

Related Topics:

127 people viewed this question

Ask a Question

Usually answered in minutes!

Top Amplifiers & Preamps Experts


Level 3 Expert

4502 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

66352 Answers

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

Answer questions

Manuals & User Guides