Alpine R2-SB12V Single Type R2 12-in Subwoofer in Vented Enclosure - Creative Audio
Alpine Type-R SWR-12D2 12" 3000 Watt Dual 2-Ohm Car Audio Subwoofer Sub SWR12D2 | Audio Savings
Amazon.com: Alpine ALP19-R-W12D4 Car Audio Type R Series Sub Dual 4 Ohm 1500W Peak 12" Subwoofer : Electronics
LAB SlapBox™ 2.00 ft^3 Ported MDF Enclosure Box for Single Alpine 12" S-Series 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