I don't have a real high power setup, but it's nice.

Anyways, I've got an mtx 421d amp. Sounds great, but at night with my headlights on at the higher volume I have not only dimming but even cutting out. While the car is in motion it does fine, but as soon as I engage the clutch and the motor gets to the lower rpm's it starts dimming and sometimes cuts out. What confuses me is I have a brand new alternator, an optima yellow top battery, AND a 1.5 farad cap... why am I still having problems?!

I was thinkin maybe a 2nd car battery would eliminate my problem? Or maybe a bigger cap?