Yamaha NS-P610CH 6-Piece Home Theater Speaker and Subwoofer System 4 satellite speakers, 1 center-channel speaker, and a 70-watt powered subwoofer Handsome piano-black finish Magnetically shielded for distortion-free placement near a television or computer monitor Subwoofer features Advanced Yamaha Active Servo Technology 75 to 33 kHz (+/- 3 dB) frequency response