Amazon.com: Polk Audio PSW505 12" Powered Subwoofer - Deep Bass Impact & Distortion-Free Sound, Up to 460 Watts, Easy Integration with Home Theater Systems, BLACK : Electronics
Polk Audio PSW 1000 Subwoofer For Sale - Canuck Audio Mart
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JBL PSW-1000 High Current Powered Subwoofer
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
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Polk Audio PSW-1000 two 10" long throw woofer subwoofer Photo #633119 - US Audio Mart