Hello.
It is Marek from EM Custom.
I have to confim that early lot of V35 switcher had pop issue.
It applies to V35 version only.
We replace the malfunctioning devices free of any charges.
Just contact us.
[email protected]
Here is midi interface for Mesa amps. So you can switching your amp from Helix ( or any midi controller ) via midi
http://eng.emcustom.eu/midi-interface.html
Instead of using external separate cables it is possible to switch channels via midi.
If you have midi controller, just replace original footswitch with midi interface.
No external power is needed.
https://www.youtube.com/watch?v=aSbD9JHwdvc
http://emcustom.eu/midi-interface.html