2) Alpine Type-R R2-W12D2 12" 750w RMS Car Subwoofers+Vented Sub Box Enclosure | eBay
Box build for 2-12" Alpine Type-R subs - YouTube
12" Alpine Type R Subwoofer and Enclosure | Tacoma World
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