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Old 05-19-2009, 08:41 AM   #7
ca1242
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Join Date: Aug 2003
Location: Burke, VA
Posts: 7,635
My Ride: 2003 330i
A single TR7 should be able to handle everything. It doesn't really need to provide much current, since it is only driving logic inputs in the Alpine units, it isn't running anything.
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