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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac - Buzzing from External Speakers


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y-guy

 
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Member Since: Mar 12, 2008
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Mac Specs: 24" iMac 2.4 - 4GB RAM, Logitech S530 Kbrd/Mouse, Logitech Z2300 Speakers

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I have a 24" iMac, today picked up a of Bose Companion 2 speakers to replace my old Boston Acoustic speakers.

The problem is that after the computer sits idle with no sound for about 30 seconds the speakers begin to make a humm/buzz noise. I can move the wires and nothing changes. I've spread the speakers as far as I can, and it continues. I moved the Bose adapter to an extension cord and ran it about 25' to an outlet on another circuit from the iMac, still humming.

I've timed the time it takes from no humm to humm and its 30 seconds. My gut is telling me that the iMac is shutting down an internal amp to save power or something.

Is there something I can change to eliminate this, or is this a fault that needs Apple's attention?
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y-guy

 
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Member Since: Mar 12, 2008
Posts: 133
y-guy will become famous soon enough
Mac Specs: 24" iMac 2.4 - 4GB RAM, Logitech S530 Kbrd/Mouse, Logitech Z2300 Speakers

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Problem solved found this link with the help of another Mac owner
http://docs.info.apple.com/article.html?artnum=86655

Picked up the Radio Shack Ground-Loop Isolator and I have no more buzz.
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