Alpine R-W12D2 12" Dual 2 OHM Type-R 2250W Pro Loud Subwoofer Speaker Sub - Walmart.com
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
2) Alpine S-W12D2 12" 1800w Car Audio Subwoofers+Vented Sub Box Enclosure SW12D2 - Rockville Audio
Alpine S-Series 12" Dual-Voice-Coil 4-ohm Subwoofer Black S-W12D4 - Best Buy
Alpine - SBG-1244BP Ready to use Band Pass Subwoofer (4Ohm)
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
Universal Fit Alpine S-W12D2 Type S Triple 12" Subwoofer Loaded Sub Box New 793276242150 | eBay