Polk Audio PSW1000 Power Subwoofer Speaker Woofer Replacement Original 10 Inch  | eBay
Amazon.com: Polk Audio PSW10 10" Powered Subwoofer – Power Port Technology, Up to 100 Watts, Big Bass in Compact Design, Easy Setup with Home Theater Systems, Timbre-Matched with Monitor & T-series Polk
Polk Audio PSW1000 (Ebony) Powered subwoofer at Crutchfield