Amazon.com: Massive Audio SUMMOXL124-12 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 12" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Massive Audio KILOX 124 2000 Watt 12" Dual 4 Ohm Car Audio Subwoofer New KILO X 623169611230 | eBay
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Massive Audio GTX Series 10-Inch 700-Watt-RMS Dual 4-Ohm Subwoofer in the Mobile Audio department at Lowes.com