These are the overall speaker specs... not sure how that would translate for the woofer... all I can figure is the woofer is fs 45Hz ~ XXXX
Nominal Impedance: 8 ohms
Power Rating: 30 to 175 watts
Crossover Frequencies: 450Hz, 3000Hz
Frequency Response: 45Hz-35kHz +/-3dB
Sensitivity: 90dB 2.8V/1 meter