Alpine Type S SWS-12D4 12 Inch 1500 Watt Max 4 Ohm Round Car Audio Subwoofer
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 SWR-1242D Type-R 12" subwoofer with dual 4-ohm voice coils at Crutchfield
2) Alpine S-W12D2 12" 1800w Car Audio Subwoofers+Vented Sub Box Enclosure SW12D2 - Rockville Audio
Alpine SWR-1222D Type-R 12" subwoofer with dual 2-ohm voice coils at Crutchfield