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Old 10-24-2008, 10:42 AM   #19
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Join Date: Aug 2003
Location: Burke, VA
Posts: 7,635
My Ride: 2003 330i
To the original poster, If it is not to late, check you amplifier manual. I am pretty sure Zapco amps take the head unit's balanced-differetial signals directly = no loc required and better sound quality.

to miccou: If you don't have an oem amplifier and you amp takes epeaker-level inputs, then you don't need a loc.
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