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LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure Box for Single Alpine W12S4 / SWA-12S4 Subwoofer
Alpine W12S4 BassLine Series 12" 4-ohm subwoofer at Crutchfield
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PAIR Alpine W12S4 12" 750W 4 Ohm Reinforced Subwoofers
