ABSOLUTE U.S.A VEGS12 Single 12" Vented Ported 3/4" MDF Car Subwoofer – absoluteusa
Subwoofer Box ++ | Ported Box | Slot
Single 15" Ported Subwoofer Box Enclosure 1" MDF Vented Sub Box RI Aud – Pricedrightsales
Amazon.com: 12" Single Vented Slot Ported Bandpass Sub Box Subwoofer Enclosure Speaker Box Ground Shaker : Electronics
Slot Port Centered - NSC
Slot Port, Subwoofer Up - NSF | caraudiofabrication
BLACK 15" DUAL SLOT-CENTER PORTED SUB BOX
10" Dual Slot Center Ported Vented Sub Box Subwoofer Enclosure Ground Shaker Box | eBay
GP Audio 10" Single Ported 3/4" (1 cubic ft) Subwoofer Enclosure
Proline X 6.5" Ported MDF Subwoofer Enclosure
Qpower Qbass Dual 12 Inch Heavy Duty Mdf Material Car Audio Subwoofer Enclosure Boxes With Shared Slot Port Vent And Dual Chamber Design, Charcoal : Target