i thought i was getting out of stereo, but now decided i wan more alot more. anyway i want to wall of civic coupe. the box can be 39" long, 32" high, and 20" deep. i want either some L7's ported or 2 solo x 18's ported for spl comps mostly. car will be driven very little anytime else. would that be enough air space? thanks for help or suggestions.