JBL Stage 1200S Sealed enclosure with one 12" subwoofer at Crutchfield
For 2 12" Sundown Audio SA-12 Subs Custom Ported Subwoofer Box Sub Enclosure | eBay
Qpower Qbass Dual Vented 12 Inch Heavy Duty Mdf Material Single Car Audio Subwoofer Enclosure Box With 2 Vents For Better Heat Management, Charcoal : Target
Roswell R1 12" Sub Enclosure Marine ported single subwoofer enclosure at Crutchfield