...to hold three MTX 5000 10's in a regular cab pickup. I have heard from someone who has one that is for three JL 10x6's that is 50" long, 15" tall, 8" deep at bottom, and 5" deep at top. 4350 cubic inches (thanks 4dr vette) or 2.5136cubic feet (thanks again). does this sound right to you guys? should I partition out the subs seperately? Ive never built a box before, but im sure im up to it. I am pretty good with building shit..... I just need to figure out the specs for it, and I will be good to go!