Amazon.com: Alpine Bundle Compatible with Universal Car X-W12D4 Type X 12" Loaded SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure : Electronics
LAB SlapBox™ 2.00 ft^3 Ported MDF Enclosure Box for Single Alpine 12" X-Series Subwoofer
Alpine SWX-1243D Type-X 12" Subwoofer - Signature Car Sound
Alpine SWX-1043D Type-X 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Amazon.com: Alpine Bundle Compatible with Universal Car X-W12D4 Type X 12" Loaded SPL Bass Subwoofer Labyrinth Vent Sub Box Stereo Enclosure : Electronics
Alpine SWX-1043D Type-X 10" DVC Subwoofer - Signature Car Sound
Universal Car Stereo Paintable Ported Dual 10" Alpine X-W10D4 Type X Sub Box New 793276040497 | eBay