Front Input: ¼ inch TS unbalanced, dynamic range >108dB, impedance 1 MegOhm Alternative Input: ¼ inch TRS balanced with ground lift, dynamic range =105dB Return: XLR balanced, ¼ inch balanced with ground lift, dynamic range =105dB Master L and R Outputs: XLR balanced, ¼ inch TS unbalanced with ground lift max. output level: XLR +22dBu, TS +16dBu Monitor Output: ¼ inch TS unbalanced with ground lift max. output level: +16dBu Direct Output/Send: ¼ inch TS unbalanced with ground lift max. output level: +16dBu Output Dynamic Range: >108 dB Dedicated Headphone Output: ¼ inch TRS stereo, 33Ohm Midi: 5-pin DIN commectors for In/Out/Thru Switch/Pedal: Two 1/4 inch TRS, each for mono/stereo switch or expression pedal (10kOhm min, 100kOhm max. impedance) Network: RJ45 connector USB: USB 2.0 (FS) compatible device, USB-A and USB-B connectors