OneCall via eBay offers the SVS 400-watt 12" Powered Subwoofer, model no. SB12-NSD, for $399 with free shipping. (Several third-party sellers via Amazon and SVS charge the same.) That's $280 under list and the lowest total price we could find. This 35-lb. sub features a 12" driver, 400 watts RMS power, 23Hz to 270Hz frequency response range.