SUBWOOFER: 15" DUAL VOICE COILCONE: NON-PRESSED CONE FOAM EDGEVOICE COIL(BSV): 4-LAYERS, 4"MAGNET: 100 OZ x 3RMS POWER: 4000WMAX POWER: 12000WFREQ.RESP.: 30HZ-500HZSPL: 92dB/W/MIMPEDANCE: 1 OHM+1 OHM