Finally read a few pages back. Interesting you guys aretalking about subs. When I was stationed in Hawaii I actually built my own box and used a Mach 5 Audio IXL15.2. The box has a volume of 8.171 Ft3 and is ported and the sub does fairlywell but the box is a little big for the sub. I have not done the sub crawl butbeing 38" x 30" outside dimensions with 1" mdf - It could suffice as a coffee table and it is downfiring. An 18 would do much better in it and have been looking at a few optionsto include Mach 5 Audio's IXL 18 & FTW 21 and RE XXX 18 and one more I can'tremember off the top of my head. I have debated adding a EMP sub for the"mid" bass range as this sub does excel at the lower end of the Hzspectrum. maybe a single 10 or 12, but would need to do some research on howthe EM subs compare to others in the price range of 500 to 700 from others.