how do i keep my lights from going Dim every time the bass hits in my car if its not a good idea to use a capacitor(i have read a few post on capacitors being bad)? i dont really have 600+ for a new alternator and battery. i will be running Two SA-12 with more than likely a SAZ1500 amp and my alternator is only like a 90amp so i know if i have that set up its going to at least make my lights Dim