I know this question is old, but I can't remember. I need to upgrade my electrical system. I am running a Pioneer Premier 770MP deck which is 50w x 4 peak:22w x 4 rms and A kicker KX600.1 @ 2 ohms. Its not in yet, Im waitin on the new Brahmas to come out which is in like a week. I still gotta test my alternator so that will affect what I do but what is the best/cheapest way to upgrade my electrical system and what brands are good? Heres what I think but I have really no idea. 1. Alternator (150 Amp) 2.Battery (optima yellow top) 3.Capacitor (No idea)