I have a 12 inch GoldSOUND 15.2 mm Xmax DVC rated 250 rms woofer on both sides. Currently they are only in only 2.7 cu ft boxes which are really too small. But they are attached to a 350 w/ch Linear Tech power amp, and put out plenty of bass for anything I need. While I'd like to enlarge their boxes to 7 cu ft each, I wonder if I really need it. Usually I have to keep the woofer balance back by turning down the volume control on the woofer amp to no more than 1:00 or they overwhelm the rest of the system. I've never turned it up past 3:00.

Marlboro