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Amazon.com: Alphasonik AS12DF 12" 1500 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
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Amazon.com: PIONEER TS-SW3002S4 12" 1,500-Watt Shallow-Mount Subwoofer with Single 4ohm Voice Coil : Electronics
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