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Alpine Two R2-SB12V Next-Gen 12" R-Series Halo Loaded Sub Enclosures with KTX-H12 Link Kit - Creative Audio
Alpine R2-SB12V Single Type R2 12-in Subwoofer in Vented Enclosure - Creative Audio
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FS MTX 12" Thunder 8000 Subs, Alpine 10" Bandpass Sub, Alpine 240w Amp | Acura RSX, ILX and Honda EP3 Forum
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Box for Alpine Type-R 12s - ecoustics.com
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Subwoofer Enclosure - Alpine SWR-1242D (4th Order Bandpass) | 3D Warehouse
Alpine SWS-1023D Type-S 10" subwoofer with dual 2-ohm voice coils at Crutchfield
Alpine Subwoofer Boxes at Crutchfield
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Alpine SBS-1041BP Type-S 10" Single Bandpass Subwoofer Enclosure at Crutchfield
RAM Designs: Alpine Type-R Dual 12" Ported Sub Box Design - YouTube
