-woofer:15"Steel Frame 75.5mm voice coil,80 OZ -frequency range:45 HZ-200 HZ -impedance:8 Ohm -sensitivity (1m/1w):97dB -max SPL:128dB -rated power:500W -output power:1000W -woofer:10" Woofer Steel Frame ,38.6mm voice coil,30 OZ -tweeter:34 mm Ti.Diap.driver. -frequency range:130HZ-22KHZ -impedance:8 Ohm -sensitivity(1m/1w):97dB -max SPL:118dB