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Guest posted a article in HELIX/HXHelix 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 HX Effects L and R Main In: 1Meg unbalanced TS L and R Main Out: Impedance-balanced TRS Sends: Impedance-balanced TRS Returns: 1Meg unbalanced TS (instrument mode)/10K unbalanced TS (line mode) Note: Although all the outputs use TRS jacks, they are not true balanced outputs. They are only impedance-balanced. · A true balanced output would have the tip and ring driven with (out-of-phase) audio signal. The outputs on HX Effects are only driven on the tip. · However, because they are impedance-balanced, you can still get some common-mode rejection of external noise sources (i.e. power line hum) if a TRS cable is used to connect the HX Effect outputs to a device with balanced inputs.