Suggested Retail:$135. Polk Audio PSW10 10'' Powered Subwoofer - Power Port Technology, Up to 100 Watts, Big Bass in Compact Design, Easy Setup with Home Theater Systems Black. Add deep bass excitement and extended dynamic thrills to your music or movie sound system with the easy-to-connect and easy-to-use PSW 10. Its 10'' Dynamic Balance composite cone driver and non-resonant enclosure produces deep, smooth response with superior detail and accuracy, while limiting distortion. The sub is powered by a high-current amplifier producing 50 Watts RMS/100 Watts dynamic power. A rotary volume control adjusts the volume of the subwoofer relative to the other speakers in the system and the unit offers a continuously variable low-pass filter, adjustable from 80-160 Hz. Easily accessible, professional-grade line- and speaker-level inputs, and speaker level outputs, allow easy connection to any system.. 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.