Evh 5150 iii channel switch with ext amp in Helix Posted April 5, 2022 On 4/3/2022 at 1:19 PM, Kellan707 said: Resurrecting this one. I just got a helix LT and 5150 iconic stack. I contacted evh to try and figure out if their switching schematic is short-to-sleeve or not but the guy I talked to had to dig into it and said he’d get back to me. Haven’t heard anything yet. being that the iconic has no midi on board, how screwed am I for switching channels on the amp using the helix? Can something like a disaster area midi/trs box fix this for me or am I totally SOL for switching channels with my helix with this head? Have no idea what the tip/sleeve combinations are for the 5150 Iconic, but I wouldn't go purchasing any additional hardware for switching until I had tried the 'Ext Amp' options for switching available from the LT's Command Center. The switching capability is already built into the LT if the amp has a compatible footswitching design. Probably best to wait for some info from Peavey support on the foot pedal's operation/schematic but if that is not forthcoming you could always try getting it working, proceed at your own risk(and under warranty :-).