Custom Ported Sub Box Enclosure for 1 12" Alpine Type X Subwoofer ~ X-Series | eBay
Custom Sub Enclosure | Affordable Sub Box
Custom Alpine Type X 12" SWX-1243D Subwoofer System, Qty 2 (4 speakers) | eBay
LAB SlapBox™ 2.00 ft^3 Ported MDF Enclosure Box for Single Alpine 12" X-
Alpine SWX-1243D 12" Type-X 3000W Dual 4 ohm Car Subwoofer
Alpine SWX-1243D Type-X 12 Subwoofer
Alpine® Type-X 10" Black Car Subwoofer | Paradyme
Alpine X-W10D4 Car Audio Type X Series Sub Dual 4 Ohm 1800W Peak 10" Subwoofer 793276040497 | eBay
Amazon.com: Alpine Bundle Compatible with Universal Car X-W12D4 Type X 12" Loaded SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure : Electronics
Amazon.com: Alpine X-W10D4 Car Audio Type X Dual 4 Ohm 1800 Watt 10" Subwoofers with Sub Install Kit Package : Electronics