6000/4=1500... didn't think that MTX was that underrated If I were you I'd get 3-4 batteries plus the starter especially if your getting the BP Power option, which I would if your giving them 1500 watts each just to be safe. I've got one 12" Q w/ the BP Power option with an Optima Yellowtop under the hood, a 220 amp alt and a Kinetik HC800 in back. Might be a little bit of overkill but better safe than sorry lol