I built the 36"x 36" WO for 2 12" I built it to spec except the hight it's only 13 1/4" H because I have a teaunno cover on. So I am planning to rebuild it soon. I was looking for someone to tell me what I need to make the L and W dimensions so I can keep my H. This is in a s10 bed with a blow through, I do have up to 40 1/2" between the wheelwells. Thanks for the time. Right now I am hitting 135db @ 34 hz which is bad ass but I know it can be better