OK this has been a nightmare and I want it fixed. OK Let me start at the beginning 1. I installed POLK Speakers and a JL Audio amp on the back of the back seats. I ran the power cables for the amp directly from the battery trying to reduce feedback through the body. Noise Issues started 2. I got the Alpine pro hub because I wanted a Ipod interface, dvd plackback (which I haven't setup as yet) and to get rid of the high to low level convertors. Still got Noise Issues Current Situation I installed a filter on the postive at the battery which helped but not enough. The noise is a whine, also I noticed there is a similar noise coming from the engine bay which I think might be the Alternator, has anybody else had the same problem? Please guys help me if anyboby knows a place I could take it to get it fixed I'd be willing to pay thanks