Ok yeah, so RE tells me that if I made it 36" wide, 11" tall, 20" deep, and a 4" port 1, with 4" port 2, I would have ~ 3 cu ft, and 33.5hz tuning.
(This is with the 12's firing out of the top and the port firing out of the back)
Tell me if you guys think this is good enough to go into construction.