Definitive Technology SuperCube 4000
Concentrated bass - this compact cube will amaze you : Definitive's Technology's SuperCube 4000 subwoofer proves that powerful bass doesn't require a big box. The tried-and-true SuperCube formula features an active woofer and two same-sized passive radiators, all driven by a brawny 1,200-watt amplifier. This sub will fill your room with sound while taking up less than a cubic foot of space. Rock-solid bass requires rock-solid construction: The SuperCube 4000 sub uses a new class of high-efficiency amplifier to bring 1,200 watts to bear.