SWR-10D4 - Alpine 10" Dual 4-Ohm Type-R Series Subwoofer
Alpine S-W10D2 S-Series 10" subwoofer with dual 2-ohm voice coils - Breakers Stereo and Performance
Alpine SWR-T10 10" 1800 Watt 4 Ohm Shallow Mount Car Audio Subwoofer Sub SWRT10 | Audio Savings
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
Amazon.com: Alpine R-W10D4, R Series Dual 4 Ohm Voice Coil 2250 Watts Subwoofer, 10" : Electronics