LAB SlapBox™ 2.25 ft^3 Ported MDF Enclosure Box for Single Alpine 12" R-Series Subwoofer
Alpine Type-R 12" Subwoofer | P.C. Richard & Son
Amazon.com: Alpine ALP19-R-W12D2x2wKit Car Audio Type R Dual 2 Ohm 1500 Watt 12" Subwoofers with Sub Install Kit and HA-SWKD Dual Sub Box Install Kit - 16 Screws and Speaker Wire with
Alpine R-Series RS-W12D2 12" Shallow Mount Subwoofer with Dual 2-Ohm Voice Coils
R-W12 Alpine Type R 12 Inch 2250 Watt Max 4 Ohm Round Car Audio Subwoofer %7C R%2DW12D4
Best Buy: Alpine Type-R 12" 1000W Subwoofer Black SWR-12D4