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LAB SlapBox™ 2.00 ft^3 Ported MDF Enclosure Box for Single JBL W12GTi MkII Subwoofer
Custom Ported Subwoofer Box Sub Enclosure for 1 12" JBL W12GTi MkII Sub ~ 32Hz | eBay
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JBL W12GTI TECHNICAL DATA Pdf Download | ManualsLib
JBL W12 GTI (SERV.MAN4) User Guide / Operation Manual — View online or Download repair manual
JBL W12 GTI MkⅡ | Sub Woofer with BOX | Croooober
32 Hz Custom Ported Sub Box Enclosure for 2 12" JBL W12GTi MkII Subs BIRCH Vehicle Electronics & GPS Car Audio & Video Installation