You guys asked so here it is, our custom fiberglass wedge sub enclosure. This was designed to fit behind any seat in any truck and lets the seat go all the way back. We designed it for 3 Pioneer Flat 10-inch subs. You can change it up and do any flat sub you like. We try to keep the Pioneer subs in stock if you need them. I can also sell you a Rockford or Kicker sub amp for them.
The dimensions are as follows:
The box is 45" long by 16.5" tall and 5 3/4" deep at the bottom and 3.5" deep at the top.