JBL Club 1224 12" 1100 Watts Peaak Car Audio Subwoofer with Selectable Impedance 50036345309 | eBay
100% possible to put 2 12s in the trunk of a 1997 z3. JBL stage 1200B : r/bmwz3
W12GTI II | 12 inch Differential Drive Design Subwoofer
JBL S2-1224 SSI Car Subwoofer
JBL 12s for Sale in Virginia Beach, VA - OfferUp
JBL Subwoofer 12s for Sale in Sterling Heights, MI - OfferUp
JBL - GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer - Black | eBay
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