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Old 06-08-2009, 11:07 AM   #2
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Join Date: May 2009
Location: Texas
Posts: 504
My Ride: 2001 325i
sounds like the the voice coil rubbing. Often times the voice coil shape becomes distorted because of the heat build up in the speaker on exposure to moisture. If you have installed an aftermarket amp you should expect to upgrade the speakers.

Last edited by packrat555; 06-08-2009 at 10:01 PM.
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