Those are 1000 rms each right? If they are, For 4 youll need an amp that does 4000@ .5 or 2 ohms.... Do you have the electrical for this much power? This will need atleast a 250A HO alt, and 2 big agms outback most likely.
I got a bigger alternator from the audio shop and I have 4 red top optima batteries just dont have a amp to push them like I want... I was going to use my zx2500.1 on them til I can get a great amp....