Audio Inputs Main Input Connectors: XLR and 1/4 in. TRS Type: HF-filters, servo-balanced input Impedance: 40 kOhm balanced, 20 kOhm unbalanced Maximum Input level: +21dBu balanced and unbalanced CMRR: typically 40dB, >55dB @ 1 kHz Aux In and Direct In Inputs Connectors: 1/4 in. TRS (tip = left, ring = right, sleeve = ground Type: unbalanced Impedance: >15 kOhm unbalanced Maximum Input level: +21dBu unbalanced CMRR: typically 40dB, >50dB @ 1 kHz Audio Outputs Connectors: XLR and 1/4 in. TRS Type: balanced/unbalanced Impedance: depends on the input impedance