Peavey Sheffield PRO 1200+ 12 Inch 8 Ohm Low Frequency Driver Power capacity: 1000 W Peak 500 W Program 250 W Continuous Sensitivity: 96.3 dB / 1 W 1 m Usable freq. range: 50 Hz ~ 4 kHz Cone: Impregnated cellulose Voice coil material: 2 layers, thermally bonded copper wire Kapton former Nomex stiffener