So....... was it the connection @ OEM Amp? I have the sme problem since installing my Trunk Sub, aftermarket Amp, MS-8 and front door mids, tweeters and underseats.
Now: E92 335D, Custom Cars Branded
Gone But Not Forgotten: E90 320D Alpine White
Last edited by AWBimmer; 03-25-2013 at 03:51 PM.