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      10-24-2010, 11:30 AM   #16
New Member

Drives: E90
Join Date: Sep 2010
Location: Kuala Lumpur

Posts: 29
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Whining noise

After the amp upgrade I noticed a high pitched whining sound from the back, perhaps rear speakers, even when the audio is in silent. In sync with the RPM. My install is just like MudPhud's.