JBL CS1200BSI - Car Subwoofer (Box Enclosure Subwoofer)
JBL Stage A120P Powered subwoofer at Crutchfield
LAB SlapBox™ 3.75 ft^3 Ported MDF Enclosure Box for Single JBL W15GTi MkII Subwoofer
2x JBL Stage 102 900W 10" Car Subwoofers with Dual Sealed Subwoofer Enclosure 818060014062 | eBay
JBL FUSE 8" (200mm) Passive Subwoofer Enclosures (Pair) - Used Very Good - Creative Audio
JBL Stage 1200S Sealed enclosure with one 12" subwoofer at Crutchfield
Amazon.com: JBL SUBBP12AM - 450 Watts (150W RMS) 12” Amplified 12 in. Ported Subwoofer with Sub Level Control and Distortion Free Bass with Gravity Magnet Phone Holder Bundle : Electronics