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MB Quart RW1-204 Reference 8" mobile 1200 watt Max Power Dual 4 Ohms Subwoofer - Walmart.com
MB Quart PWE 304 12" subwoofer with dual 4-ohm voice coils at Crutchfield
RWE-302 - MB Quart 12" 1000 Watt Reference Series Subwoofer
MB Quart RW1-204 Reference 8" mobile 1200 watt Max Power Dual 4 Ohms Subwoofer - Walmart.com