Audio frequency bandwidth: 20 - 20000 Hz Equivalent noise level: 18 dB-A Sensitivity: 9 mV/Pa Signal to Noise: 76 dB-A Preattenuation Pad: -10; -20 dB Bass cut filter: 75; 150 Hz Electrical impedance: 200 Ohms Recommended load impedance: 1000 Ohms Polar Pattern: Cardioid