Alpine 12” Type R-Series Ported Bass Package Includes one Alpine R-W12D4 12” subwoofer, and 2.25 ft³ optimized ported enclosure
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