From what I have read I have a good feeling that your box is not big enough. Each woofer requires 1.25 cubic feet of air space. Take that X 3 and add 0.09 each for displacement and that is a 4 cubic foot box. For that set up JL recommends an enclosure that is 46" wide!!! I just don"t see how its going to fit. Take a picture please. I am curious to see how the box is built and how it fits. They also require 500W each!!!! Are you pulling a trailer of batteries or a small nuclear power plant? I had my alternator re-wound to put out 180 amps and that is just enough for 2-300/2 and 1-500/1 JL Slash. I need more info and pictures please.