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 Black : Electronics
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Polk PSW 120 Powered Subwoofer - Working - REDUCED! For Sale - Canuck Audio Mart
Polk Audio Powered Subwoofer 8” PSW120 | eBay
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Polk PSW 120 subwoofer for Sale in Duncanville, TX - OfferUp
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Polk PSW111 Powered Subwoofer Reviewed - Future Audiophile Magazine