So i need a box to put my 2 orion 12" h2 with 4ohm coils in. What size would u recommend? Ported or sealed? What hz? Im putting them in the back of a 92 chevrolet s-10 blazer 2-door. I have roughly 37 inchs of width and about 24 inches of depth to work with. What size box cubic feet and size please help!!!