Klipsch HDT-600 Home Theater System The Klipsch HD Theater 600 comes with four satellite speakers, a matching center channel speaker and a powerful subwoofer. Its a complete, yet compact, surround system that affordably adds crisp dialogue, brilliant music and explosive effects to your video content. EXCLUSIVE KLIPSCH HORN-LOADED TECHNOLOGY Each speaker utilizes an exclusive Klipsch MicroTractrix horn for its .75 (19mm) tweeter for increased output and superior detail reproduction. The improved, 2.5 (63.5mm) long-throw IMG woofers expand midbass bandwidth, blending perfectly with the subwoofer for a system that sounds a lot larger than it is. 8 INCH DOWNFIRING WOOFER IN A SOLID MDF CABINET The 8 inch, down-firing, fiber composite-woofer can fill a room with bass that is not only heard but felt as well. The solid MDF cabinet is designed for low resonance while its bass-reflex design helps to reproduce deep bass for movie action you can feel. With volume, crossover and phase controls you can adjust for the level of bass that best matches your room.