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Amazon.com: Dayton Audio SUB-1200-12" Powered Subwoofer with 120W RMS, Downward-Firing Design, and Auto On/Off Feature : Electronics
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Amazon.com: Monoprice SW-15 600 Watt RMS 800 Watt Peak Powered Subwoofer - 15in, Ported Design, Variable Phase Control, Variable Low Pass Filter, for Home Theater : Electronics
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