10" Alpine Type R Custom Ported Sub Box Build - YouTube
Alpine Audio 10" Type R & Type X Custom Aero Ported Box X-W10D4 R-W10D4 R-W10D2 | eBay
Single Alpine 10" Type R Flexing - YouTube
Subwoofer Box Alpine R-W10D4 | Ported Box | Slot
Alpine SWR-1043D Type-R 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine R2-SB10V Single Type R2 10-in Subwoofer in Vented Enclosure - Creative Audio
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 10” Type-R Thin Powered Sealed Bass Package Includes one Alpine SWR-T10 10” thin subwoofer, one R-A75M amplifier, and sealed enclosure