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Amazon.com: Rockford Fosgate Pair of 2 Punch P1 15" 1000W 4-Ohm SVC Subwoofers | 2 x P1S4-15 : Electronics
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Amazon.com: 2X Gravity 8 Inch 1000 Watt Car Audio Subwoofer w/ 4 Ohm DVC Power 8' Sub Pair - Feature Dual Voice Coil, Thick Magnet, Design for Car, ATV, Van, High Performance