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Alpine R-W12D4 Car Audio Type R Dual 4 Ohm 1500 Watt 12" Subwoofers with Sub Install Kit Package : Electronics
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Amazon.com: Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4 : Electronics
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Alpine 12” Type X-Series Ported Bass Package Includes one Alpine X-W12D4 12” subwoofer, and 2.00 ft³ optimized ported enclosure
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