MS-SW412 PRO DOBLE BOBINA 12” (318mm) Subwoofer Paper cone with rubber edge 2”(50mm) dual voice coil: 4 + 4 40oz x 2strontium magnet RMS: 800w Max power: 1600w Frequency response: 30 – 900hz Sensitivity: 87 + 2dB/1w at 1m