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Alpine Halo R2-Series Dual 12" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB12V - Best Buy
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Amazon.com: Massive Audio GTX154 – 15 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 15" Subwoofer 700 Watt RMS, 1400w MAX Dual 4 Ohm, 2.5 Inch Voice Coil. Sold Individually : Electronics
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