Basement HT room? I'd go for the biggest one. \:\) (which i did , and i live in an attached apartment..) I got it, tho, to future proof for a move. For now I keep the knob turned down a bit, but this thing can create shockwaves that you can physically feel in your chest. The sound is like a low end void, with no rattle. (except when i hear the walls of my place shift)

It's glorious. AND... for the youngsters... the Pixar films on Blu-Ray will make your sub do naughty, naughty things to your ears.