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      01-24-2013, 05:49 PM   #12
WilliamS
GoofBall
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Drives: 2008 E92 N54 Xdrive
Join Date: Jun 2012
Location: Tampa, FL

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Ive run into issues like this in the past, almost 100% solved by grounding the headunit and amp in the same locations. Im not 100% familiar with BMW electronics but this will prevent the audio cables from trying to balance the current.