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Amazon.com: Massive Audio SUMMO64S - 6.5 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 6.5" Subwoofer 200 Watt RMS, 400w MAX Dual 4 Ohm, 1.5 Inch Voice Coil. Sold Individually : Electronics
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Amazon.com: Earthquake Sound SWS-6.5X 6.5-inch Shallow Woofer System Subwoofers, 4-Ohm (Pair) : Electronics
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