all right sir, lemme see what you can come up with. I need a box for SPL.
4 DD 9515's. vehicle peaks around 55hz, tune like 51hz. like 16-18 sqin of port per cube. I'd like either 4 subs and a slot at the end, or 4 subs surrounding a centered slot. Double thick top plate, I can handle a removable port. I'd like all subs/port facing up, but COULD accept a rear-firing port. 42" wide MAX, no deeper or taller than it has to be. good luck.