I'm needing some advice on a box design for a 18" btl (old style) going in the back of a 1996 gmc suburban. Its a daily driver (no competitions) and Im looking for decent sound quality while hitting low and hard. I listen to mostly rap music and a little r & b. Not sure which way I should face the sub or the port or any of the box details to best suit my needs. Space should not be a issue since its going in suburban. Here are some other details about the install. Amp: Memphis 16-2000d (old school mojo) Components: 2 sets of CDT CL-61A w/ a kicker zx200.2 amp Electrical: 200 HO alternator and 2 yellow tops. 1/0 monster cable everywhere Head Unit: Jensen vm9411x (Yes i know Jensen sucks but it was brand new and I got a ridiculous deal for a lcd screen LOL)