Definitive Technology ProSub 800 Black 8-inch Subwoofer with 300 Watt Amplifier

Worry not, Definitive has bass down pat. Definitive Technology ProSub 800 | Black 8" Powered Subwoofer. The sonic result is accurate, awe–inspiring, high–impact, high–reality bass performance with superior transient response, vanishingly low distortion, stupendous subsonic power and high output capabilities.

eBay