I have a 2001 Blazer 4dr LT. My setup right now is 3 JLW0v4 12's in a sealed box, a 500w Fosgate amp. My lights dim when I try to bump past 12/30 on the volume. I'm planning on getting a 15" Fi Q slot ported. And a Hifonics Brutus 1206d to push it.
Would my next setup need a better charging system? If so, how many amps for the HO? Or could I just get one of those overdrive belts that just bolts onto the existing alt?