I've got two Infinity 1230 reference Subs that are in a 1.25 (per sub) cubic foot box right now and am wondering if I were to just put some ports in that box if it would sound like crap or not. according to Infinity they recommend a 2 cubic foot box for ported tuned at 30 hz. there's a place nearby selling 2 1/8 *5 inch ports for 2 bucks a shot.
my friend had those same subs and he ported his box and it sounded like sh!t. he covered it up with little plastic basketball balls you get at wal mart and now it sounds awsome. i would leave it sealed if i were you