JBL Club 1024 10" (25cm) 1000W Component Car Subwoofer 2 or 4 ohm Impedance. Car audio systems rely on powerful bass for great sound. But the flexibility doesn’t end there. These subwoofers feature SSI™ (Selectable Smart Impedance), an exclusive impedance switch that lets you select the optimum impedance—2 or 4 ohms—for your system.
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