Yeah i left that out sorry fixmyspeaker put in a D2 coil. I will run at 1ohm. This system will end up in another vehicle next year. I did buy a red top battery. I don't want to spend the money on a alternator I'll have no use for it. Heres my other problem just ordered a precision 900.4 to run 4 6x9s also. Can i get buy using 2 batteries without doing the alternator? Or will i burn it up? I'd hate to spend $350 if i dont have to. Please remember i am new to this.