Polk Audio - 10" 200W PSW110 Powered Subwoofer Black! Works Just Great! 747192117696 | eBay
Good Working POLK AUDIO PSW110 Black 10" 200w Powered Subwoofer | eBay
Amazon.com: Polk Audio PSW111 8" Powered Subwoofer - Power Port Technology | Up to 300 Watt Amp | Big Bass in Compact Size | Easy Setup with Home Theater Systems Black : Electronics