Frequency Response (Ref .1 kHz, channel controls centered): 50 Hz to 20 kHz +/- 2 dB; -3 dB corner at 25 Hz<br />Total Harmonic Distortion: <0.1% at +18 dBV output level, 50 Hz to 20 kHz (through 20 Hz-20 kHz filter; Input 1 and Master at 5, all other controls full counterclockwise)<br />Hum and Noise: Equivalent Input Noise: -125 dBV (150 ohm source; through 400 Hz_20 kHz filter); Equivalent Input Hum and Noise: -123 dBV (150 ohm source; through 20 Hz - 20 kHz filter); Output Hum and Noise (through 20 Hz to 20 kHz filter; channel controls full counterclockwise): Master full counterclockwise: -90 dBV; Master full clockwise: -62 dBV 8<br />Common Mode Rejection: >70 dB at 1 kHz<br />Polarity: Mic/Line, Send inputs to all outputs are non-inverting; Aux input to all outputs is inverting<br />Overload and Shorting Protection: Shorting outputs, even for prolonged periods, causes no damage. Microphone inputs are not damaged by signals up to 3 V; Line and Monitor inputs by signals up to 20 V<