nono sends to stereo returns in Helix Posted October 8, 2019 ? Sorry I don't quite follow. You want to connect 2 external effect pedals? - Why "send 1+2 in stereo and return 1+2 in mono"??? Can you explain, what you are trying to connect and why you need this "1+2 stereo/mono/aux" thing. Why you don't use send1 and return1 for one effect and send2/return2 for the other effect?