misfit138
5,000+ posts
a whole new type of aids
The OP should've specified that his sub in an old (2005-ish) model XXX 15".5ft^3 tuned to 28-30hz.
RE recommended:
sealed: 2 - 3 cubes
ported: 4 cubes @ 27Hz
I honestly don't know if those numbers any better than what RE recommends for the new XXX, though.