Rockville RSST12 Single 12" 0.9 cu.ft. Sealed Car/Truck Shallow Sub Enclosure
GP Audio 6.5” Ported MDF Subwoofer Enclosure Single 6.5" Ported 3/4" (0.30 cubic ft) Tru Spec Series Subwoofer Enclosure (Made in the USA) - Walmart.com
Amazon.com: Rockville RDV12 Dual 12" Vented Subwoofer Enclosure Box 1.55 CU FT 3/4" MDF : Electronics