View Single Post
Old 02-26-2013, 12:07 AM   #10
Registered User
Join Date: Mar 2012
Location: USA
Posts: 41
My Ride: 2004 330xi
Originally Posted by markusmarkus View Post
The oem amp needs balanced differential inputs, not speaker level signals. Line level signal won't work either. I replaced my oem amp with a JL 400/4 amp that accepts balanced differential inputs. Worx fine.
The stock amp accepts speaker level, it's a straight shot from an aftermarket head unit to the bmw amp.
opti is offline   Reply With Quote