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      04-16-2012, 12:12 PM   #10
808MGuy
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Drives: 2009 E90 M3
Join Date: Jun 2008
Location: Oahu, Hawaii

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Quote:
Originally Posted by kmarei View Post
how did they tap into the factory wiring?
I would look here first. If the rear outputs were used, the sub bass is filtered out of that line.
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09 E90 M3 - Interlagos Blue / Black Novillo / Sycamore Anthracite / Eibach / HRE