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SWR-12D4 - Alpine 12" Dual 4-Ohm Type-R Series Subwoofer
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Best Buy: Alpine S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4
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Alpine® W Series 12" Bass Car Subwoofers | Audio Express | Western United States
Alpine SWE-1242 Type-E 12" 4-ohm subwoofer at Crutchfield
Alpine | S-SB12V 12" Alpine Halo Subwoofer with ProLink™
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Alpine Next Generation S-Series 12" Dual-Voice Coil 4-Ohm Subwoofer Black S2-W12D4 - Best Buy
Subwoofer Specific, Alpine, E-S-R-X Subwoofer – Atrend USA
Alpine SWR-T12 - 12" Subwoofer | Pacific Stereo
Alpine R2-W12D2 Next-Generation 12-inch R-Series Subwoofer with Dual 2 – Shop Audio Depot
Alpine R-Series 12" Dual 4-Ohm Shallow Subwoofer - RSW12D4 | Abt
Alpine | 12” R-Series Shallow Subwoofer Dual 4-Ohm Voice Coils
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Alpine RS-W12D2 12” 600 Watt RMS Shallow Car Audio Subwoofer Dual 2-ohm Slim Sub - Walmart.com
