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Alpine S-SB12V Single 12" Halo S-Series Preloaded Subwoofer Enclosure with ProLink ALP21-S-SB12V
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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Amazon.com: Alpine SWA-12S4 BassLine Series 12" 4-ohm Subwoofer : Electronics
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Best Buy: Alpine Type-E 12" Single-Voice-Coil 4-Ohm Subwoofers (Each) SWE-12S4
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Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4 - Best Buy
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2 Alpine Type-S SWS-12D4 12 3000w Car Subwoofers+Vented Sub Box Enclosure SWS12 | Audio Savings
Alpine 12” Type R-Series Powered Ported Bass Package Includes one Alpine R-W12D4 12” subwoofer, R-A75M amplifier, and 2.25 ft³ optimized ported enclosure
Alpine SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
