Amazon.com: BOSS Audio Systems CXX10 Chaos Exxtreme Series 10 Inch Car Subwoofer - 800 Watts Max, Single 4 Ohm Voice Coil, Hook Up to Amp : Electronics
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Sundown Audio Xv2 10" inch DVC Dual 2 Ohm (X Series) Car Subwoofer 1500 Watts RMS
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JBL Arena X Arena Series 12" 2-ohm component subwoofer at Crutchfield