Amazon.com: Timpano 10" Sub D4 1500 Watts Max Power Dual 4 Ohm, 10 Inch Car Subwoofer 16 mm Xmax, TPT-T1500-10 D4, 2.6 in Voice Coil, Double Stacked Magnet Sub Woofer for Car
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2 X PRECISION POWER PC.15 15 3600W MAX DUAL 2-OHM POWER CLASS SUBWOOFER SPEAKER | 702MOTORINGLASVEGAS
DS18 EXL-XX15.2DHE 4,000W Max Dual 2-ohm 15" Subwoofer