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Small stereo speaker system with subwoofer, good for desktop PC setup.

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Volume knob causes right speaker to drop out

I suspect this is a general issue that could happen to any device with an analogue volume knob, because I feel like I've experienced this issue more than a few times in my life. But I created a device page for this anyway.

The right speaker cuts out entirely, but if I tap the volume knob, the sound comes back. The left speaker doesn't have an issue.

FWIW, the right speaker houses all the controls for the system, the power button, volume, and bass control, you may be able to tell from the image. The right speaker connects down to the bass speaker with some kind of data cable , and the bass speaker connects to power, and also the audio input.

I've read many pages on cleaning out volume "potentiometers" to clear up crackling, and while I do hear crackling when I rotate the knob, I was unable to clear up the crackling by repeatedly turning the knob back and forth, maybe more in depth cleaning is necessary.

I've actually got some contact cleaner, but haven't opened up the speaker to try and clean out the volume knob yet, I thought I'd ask first.

Mainly; I'm curious if a dirty potentiometer is known to cause just one speaker channel to drop out completely, or could this be another problem?

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Hi domarius,

I'm going to chime in here with my own opinion that you're on the right track. Yes, it is perfectly possible for one speaker to have issues but not the other; that knob you're turning is actually controlling not one but two potentiometers, one for each channel.

That's definitely the next step, to open it up and spray down that pot with your contact cleaner. Spray it, look for holes to get it inside and turn the knob to help distribute the cleaner and scrape off the contamination. There's a fair chance that's all it needs, but if that doesn't do it you'll probably end up needing to replace it. Take pictures while you have it open so you can hopefully identify a replacement part should it be necessary. You'll want to take note of the resistance range of the potentiometers, along with the number of contacts on each pot as well as the number of pots if it's other than two. You'll need to know if the switch has an "off" position or not; you know, like a car radio where you turn it all the way down till it clicks to turn it off. Most home stereos don't, but you need to know that.

Give it a good clean then come back and let us know how it goes! If that doesn't do it, we'll try and figure out what your next step should be.

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Thank you for your help, I will go and do that. I hadn't thought of the knob being connected to 2 potentiometers but that makes a lot of sense. I have a deadline for work so when I finally find time to do this (or it bothers me so much that I can't take it anymore XD) I will post an update. But I have a good feeling this will be the fix.

da

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domarius sarà eternamente grato.
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