how many ft^3 you need it to be? how much does the sub displace? are you going to use any bracing? sorry im not looking that crap up for you. I will tell you the dimensions if you give me that though.
3/4" MDF each sub in its own chamber would come out to this on the external dimensions....... 35.25"W x 13.5" H x 13.25" D center piece would centered at 17 5/8"