Inputs (2): XLR (3 pin, rear panel,1=GND, 2+, 3-) Input level (for +4 dBu output): -56 dBu to 0 dBu (maximum gain without pad, minimum gain with pad) Maximum Input Level: >+5 dBu (input pad disabled), +22 dBu (input pad enabled) Input Impedance: 80 dB (50 Hz to 5 kHz) Residual Noise (below +4 dBu output):