I have a single DD 1508 S4 sub that I want to build a box for my '08 F-350. The truck is a crew cab but there is barely any room under or behind the rear seat. I think the only real option is to remove the "guts" of the center console and build an enclosure inside it. The console has a couple of sturdy brackets for mounting, it should be fairly sturdy in there. What is the smallest volume that the 1508 would work well? I'm looking for good SQ. What should I tune the box to? Anybody try something like this? Any advice would be appreciated.