Helix Floor/Rack/LT Inputs   Guitar in:  Auto impedance unbalanced TS, the impedance will be determined by the first block in the signal chain. (This is a setting that can be adjusted in Global Settings) Aux In: 10k ohm unbalanced TS Returns: 1Meg unbalanced TS (instrument mode)/10K unbalanced TS (line mode)   Outputs   L and R Main Out: Impedance-balanced TRS Sends: Impedance-balanced TRS Dry (Helix Rack only): Impedance-balanced TRS