Alpine Audio 10" Type R & Type X Custom Aero Ported Box X-W10D4 R-W10D4 R-W10D2 | eBay
Ported Box Dual 10 Alpine Type R tuned to 33hz - 3D Warehouse
Alpine SWR-1043D Type-R 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Amazon.com: Alpine R-W10D2 Car Audio Type R Series Sub Dual 2 Ohm 2250W Peak 10" Subwoofer and HA-SWKD Dual Subwoofer Sub Box Install Kit : Electronics
Custom Sub Enclosure | Affordable Sub Box
Alpine Audio 10" Type R & Type X Custom Aero Ported Box X-W10D4 R-W10D4 R-W10D2 | eBay
Box I built a couple months back. Alpine type R 10” 1.5cf at 33hz : r/CarAV
Ported Sub Box Subwoofer Enclosure for 2 10" Alpine Type R SWR-10 Subs Recessed | eBay
Universal Car Stereo Slotted S Port Single 10" Alpine Bundle Type R R-W10D4 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
Alpine R2-W10D4 10" 750w Car Subwoofer+Vented Sub Box+Mono Amplifier+Amp Kit - Walmart.com
Amazon.com: Universal Car Stereo Paintable Ported 10" Alpine R-W10D4 Type R Car Audio Subwoofer Custom Sub Box Enclosure Package New : Electronics
Alpine RS-SB10 Halo R-Series sealed enclosure with 10" 2-ohm shallow-mount subwoofer at Crutchfield