Ok .. i'm trying to figure out an enclosure for a single tempest setup. First off, what's a Q value for the enclosure.. there are so many Qxx type values and i have no idea what that means. Also, when I optimize for a single tempest setup, it comes up with something like 462 liters.. isnt this a bit much? (by my calculations, i'd need a cylinder 24" diameter x 5' height or so .. this is a bit rediculous.. any suggestions? (oh .. i'm optimizing for 18 hz) and this is a ported box.