Polk Audio PSW Series PSW111 Black Compact powered subwoofer Single Type: Subwoofer Driver Units: 1 - 8" Diameter (20.32cm), Dynamic Balance Composite Cone Power Rating: Power Output: 150 watts Continuous Average Output Dynamic Power Output: 300 watts Frequency Response: 38Hz-250Hz Connectors: Inputs: Speaker level spring terminals, Line level L&R, LFE line level (unfiltered) Outputs: Speaker level spring terminals Color: Black Dimensions & Weight: 12.13" x 11.00" x 13.00" 20.30 lbs.