JBL GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer Black GX1200 - Best Buy
JBL - GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer - Black | eBay
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Amazon.com: JBL - GX Series 12" Single-Voice-Coil 4-Ohm Subwoofer GX1200- Black