JL Audio MicroSub+™ TW1 Enclosed Car Subwoofer. Single 12" TW1 Subwoofer and Built-in Amplifier (ACP112LG-TW1). With MicroSub+ systems, the power is built right into the subwoofer system. A proprietary amplifier, utilizing our exclusive DCD™ technology, extracts maximum output from the specially engineered, ultralow-impedance TW1 drivers.
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