Glass, i have a box with 2 12" woofers. They are Pioneer TS-W305DVC 800W MAX, NOM.400W. Dual voice coil. They don't it hard like i would like. Is the box to big for them? Could you recommend a good 12" woofer for this enclosure? Top is 30" wide,it is 161/2" front to back on the top. 20" front to back on the bottom and 131/4 top to bottom. The amp that powers them is an 1200 art series. Thanks Glass.