It's all about the size of boxes the subs require regardless of the diameter. I had a 10" sub and it took a huge box but now I'm using a 12" that takes on less than half the size of inclosure.
Try to find subs that require small inclosures. Some can don't use much space at all
Hatch Nation #13 : Rally Revolution #13 : ROTM Jan '13
It's Bryan, not Brian
RSVT-170 Build in Progress
Rusty is dead