I just installed a second amp in my girlfriends '05 Tibby SE and now have alternator whine though the front speakers. I have a sub amp and an amp on the front components, which is the amp that is giving me trouble. Since the Kenwood deck only has one set of RCA's out the sub amp is hooked up via RCA's, the component amp is hooked up speaker level so that we can change the level of the sub from the dash (one of the features she likes from the factory Kenwood amp). I can't seem to figure out where it's coming from. I've checked the ground and I routed the signal wires on the opposite side of the car from the power wire. Do you guys have any suggestions on what I could do to stop the problem?? Any suggestion is greatly appreciated. Thanks!!