Alpine 12" Single-Voice-Coil 4-Ohm Loaded Subwoofer Enclosure Black SWT-12S4 - Best Buy
Alpine Type S S-W12D2 Triple 12" Subwoofer Loaded 900 Watt Sub Box Enclosure New - Final 1.3 Ohm | ALPINE-PACK177A
Alpine SWS-1243D Type-S 12" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine SWA-12S4 - Bassline 12 Inch Subwoofer - Car subwoofers - Custom Sounds & Tint
Alpine Jeep Wrangler Single 12-Inch Alpine Halo R-Series Preloaded Subwoofer Enclosure with ProLink R2-SB12V (Universal; Some Adaptation May Be Required) - Free Shipping
Alpine R2-SB12V Single Type R2 12-in Subwoofer in Vented Enclosure - Creative Audio
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 S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4 - Best Buy
Alpine Type-R 12" Subwoofer | P.C. Richard & Son
Alpine 12 Inch Type-S Subwoofer (SWS-12D2/D4) | SK Customs Car Audio & Home Theater | Atlanta | Norcross | Duluth | John's Creek