SSZ15d4                                             15" Subwoofer with dual 4ohm voice coiL, 1250W RMS                           
Voice coil    75mm/3" Copper VCRMS    1250W RMS / MAX power handing    2000WSPL    91dBCone    Carbon coneImpedane    Dual 2/4ohmFrequency response    33-1.5khzMOTOR/    Triple 220mm/ 295 oz Diameter    15" / 380mmMounting diameter    374mmMounting depth    205mmXMAX    35mmQts    0.34Vas    69.9 literQes    0.37