Polk Audio DB1242SVC 12” 1110 Watt Single 4-Ohm Car Audio Subwoofer Sub+Speaker | Audio Savings
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Polk Audio 12" 720W Car Subwoofer - Newegg.com
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Polk Audio SR124-DVC 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Polk Audio PSW 12" 300-Watt Powered Subwoofer Black PSW125 BLACK 110V - Best Buy
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Polk 12" 400W Subwoofer in Classic Brown Walnut | NFM