Can someone PM me a design for a 15 inch DC level 4 with level 5 coils? I want it to be sub up port back, with the port across the bottom of the back of the box. Slot port is what I want. My max space is 38 wide by 18 high by 17 deep which I am assuming should be big enough, since DC only recommends 3.25 cubes. It will be run on 1500 RMS. Also, if you see this Preston, I guess you know what my future sub is lol