weird.. got the same car and i ran 2 kicker l7 12s ported with a kicker zx1500.1 and a mtx tn400/4 for my highs and i didnt dim at all
I've been thinking the alternator could be bad but with the car running my capacitor was saying 14.9 volts and I turned the the high beams, slappin the radio, A/C, heated seat, all on and it only went down to 14.5 so that sounds good to me.