Definitive Technology BP-8020ST - CS-8040HD 5-Piece Home Theater Speaker System INCLUDES: (2) Definitive Technology BP8020ST Floorstanding Speakers, (1) Definitive Technology CS8040HD Center Channel Speaker, and (2) Definitive Technology SR8040BP Surround Speakers SuperTower (BP8020ST) front speakers with built in 150 Watt powered subwoofer 5" x 10" low bass radiator center speaker (CS8040HD) Bipolar dispersion pattern for totally enveloping surround sound that puts you in the action (SR8040BP)