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Apple Computing Products:
macOS - Desktop Hardware
humming speakers on iMac
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<blockquote data-quote="BrianLachoreVPI" data-source="post: 1250831" data-attributes="member: 193366"><p>It definitely sounds like a grounding issue - as has been pointed out. Have you tried a different outlet - for instance - the one that the PC was in that didn't exhibit the problem? Turn off lights - and any other appliance/electronics that may share that outlet's circuit.</p><p></p><p>It just wouldn't make any sense for the PC to have "better" grounding, not as a general statement, unless you happen to have a grounding issue with your particular iMac for some reason - or perhaps just your audio jack. Maybe your UPS is introducing the hum?? Try it without.</p></blockquote><p></p>
[QUOTE="BrianLachoreVPI, post: 1250831, member: 193366"] It definitely sounds like a grounding issue - as has been pointed out. Have you tried a different outlet - for instance - the one that the PC was in that didn't exhibit the problem? Turn off lights - and any other appliance/electronics that may share that outlet's circuit. It just wouldn't make any sense for the PC to have "better" grounding, not as a general statement, unless you happen to have a grounding issue with your particular iMac for some reason - or perhaps just your audio jack. Maybe your UPS is introducing the hum?? Try it without. [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
humming speakers on iMac
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