well if i ran my amp just off the car battery then yet it would kill the it but when the car was on at peak volume the lights didnt dim at all, im gana try to hook a friends amp up and see if it dose the same thing cuz i no its no the speakers i tested them im thinking/hoping its the coxal (red/white cables) might be pinched, i think this cuz i no on home theater if the red and the white make contact u get a kind of buzzing sound and that purr may be that same thing.