E46Fanatics - View Single Post - Alternator Whine issues with complete custom Sound system!
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Old 10-03-2012, 05:23 PM   #15
Registered User
Join Date: Aug 2012
Location: il
Posts: 230
My Ride: e46
you need a filter for the power wire to the head unit. they are not expensive and are easy to install.

i would not buy this one its just to give you an idea
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