JBL GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black GX1200 - Best Buy
JBL-BASSPRO12 Car Subwoofer-GTBASSPRO2 | Quality Auto Sound | Western United States
Amazon.com: JBL 12" Car Audio Subwoofer, Black : Electronics
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JBL STADIUM122SSI 12" High Performance Automotive Audio Subwoofer with Selectable Impedance - Creative Audio
CS1214 | 30 cm (12 inch) subwoofer, with double magnet suitable for enclosed, bass reflex and bandpass boxes
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BassPro SL | Powered, 8" (200mm) car audio under seat woofer system