Speaker 'Noise'

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George Hincapie
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Speaker 'Noise'

Unread post by George Hincapie »

As per earlier thread, noise heard from left speaker only. Mostly evenings, but occasionally during the day. Noise remains same with DAC off and P90SA left channel volume at lowest setting (i.e. coming directly from amp). There is nothing new any where near my system; nothing electrical that isn't also by the right channel which is silent.

Captured this evening, here is a link. Will play with VLC or most other apps. What the fook is causing this? Driving me around the bend now to be fair.


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Dr Bunsen Honeydew
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Re: Speaker 'Noise'

Unread post by Dr Bunsen Honeydew »

It is common sense to find something like this, it needs to be logical. So swop speaker leads over between speakers at speaker and if it stays in same channel I would guess bad joint in speaker. if it changes channel then swop speaker leads at amps. If it stays same channel it is bad joint in speaker lead. If it stays same channel then swop input leads to power amps, if it stays same channel it is power amp fault, if it changes channel then change other ends on interconnects etc etc etc = common sense!!! until you find the thing that is causing it and get it fixed.

George Hincapie
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Re: Speaker 'Noise'

Unread post by George Hincapie »

Have you listened to the audio file?

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Hemmo1969
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Re: Speaker 'Noise'

Unread post by Hemmo1969 »

That sounds very odd George, very like what mine sounded like when I first got my pre power whenever I turned the volume pot up or down!! Its clear now after I worked the control with nothing attached.

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Dr Bunsen Honeydew
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Re: Speaker 'Noise'

Unread post by Dr Bunsen Honeydew »

George Hincapie wrote: Tue Feb 27, 2018 8:20 am Have you listened to the audio file?
Yes it could be bad joint upward to failing transistor, first you pin down WHICH item is at fault.

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Re: Speaker 'Noise'

Unread post by Fretless »

Follow Doc's advice - swap leads & channels to isolate the problem component.

Listening to your audio file it sounds a bit like one of my old amps with some dust in a switch or pot.

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Re: Speaker 'Noise'

Unread post by George Hincapie »

Will do.

Wish I understood why it mostly seems to happen at night...

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Dr Bunsen Honeydew
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Re: Speaker 'Noise'

Unread post by Dr Bunsen Honeydew »

It might be outside interference but we need to know which bit is letting it in. Even a bad solder joint can cause a diode effect and RF pickup, which is what it sounds like, but other things sound like that.

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Re: Speaker 'Noise'

Unread post by George Hincapie »

Testing complete. I have PM'd you.

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Dr Bunsen Honeydew
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Re: Speaker 'Noise'

Unread post by Dr Bunsen Honeydew »

Why PM we need to solve it and we are no where nearer to doing that. I don't see how I can explain it more clearly. Someone else try.

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