I don't think that the amp is power starving the car, none of the lights dim, even with the headlights and fogs on, and it doesn't happen in cd playback mode even @ full blast. I was more concerned about the amplifier introducing noise on the ground and maybe perhaps the headunit is using the vehicle ground as part of the antenna system. (it's a 00 pioneer hu btw, don't remember the model..)


*Rides*
-1999 Ford Contour SE Sport
stock ATX, best time 16.66@81mph

Pioneer HU, door speakers
Pair Cadence Ultra Drive 12s
Sony 1000 watt Class D amp

Kills:
Rockford 12" HE2 (exploded.. blew out 3 in a row, gotta love best buy protection plan :P )