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Amazon.com: Rockville RVB12.1A 12 Inch 500W Active Powered Car Subwoofer+Sub Enclosure Box : Electronics
Amazon.com: Planet Audio AC10D Anarchy Series 10 Inch Car Subwoofer - 1500 Watts Max, Dual 4 Ohm Voice Coil, Sold Individually, for Truck, Boxes, Enclosures, Use with Amplifier : Electronics