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JBL STADIUM82SSI, Stadium Series 8" 2 Ohm or 4 Ohm Car Subwoofer w/SSI – AVLeaderz
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MS-10SD4 SLIM | An advanced-design, shallow-mount, 4-ohm dual voice-coil subwoofer delivering phenomenal bass in a small space
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Replacement Full Range Speaker for JBL Charge 3 4ohm 10W Bluetooth Speaker | eBay