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JBL VT4883 Subcompact Dual 12" Cardioid-Arrayable Passive VT4883
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QSC KS212C K Cardioid dual 12" powered subwoofer — 3600 watts peak at Crutchfield
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QSC KS212C Powered Dual 12-inch Cardioid Subwoofer - Truth Seeker Productions/GearTechs.com
