High pitched noise from speakers with no input device

drewdave124

Estimable
Dec 13, 2015
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There is a constant high-pitched sound coming from the speakers which just started happening for no apparent reason. The sound gets quieter as I turn the volume UP. It also becomes dampened when I come closer to the system, which leads me to believe it's a clear EMI issue. Is there any way to fix this? Prefer advise of electrical/audio engineers, thank you
 
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