tenlbham

I've been told that some amps' channel switching "do not play well" with MFX like my Helix LT. I have a Peavey Classic 30 that I could not get the channel to change when I was using my GSP1101 amp channel switcher output, nor when I tried while using my new Helix LT. I searched on all the forums and subreddits and only found lots of others with the same problem with their particular amp (looked like it was mostly Peaveys). So I went to the manufacturers... Line 6 support and Peavey support both had no clue how to make it work and could only tell me "it should work!" So I did a bunch of testing on my own and found the problem seemed to be a potential difference between the Helix & and amp that was incompatible. And I developed a circuit that has a relay to isolate the two but still enable the amp channel (and reverb) switch. The video is a test of the first build of the circuit connected between the Helix EXT AMP and the Peavey remote jack, both reverb and channel 2 are activated by Instant Commands set for either tip, ring, or both. The pic below is the in-work box to house the circuit that will go on my pedalboard next to the Helix. When I find time, I'll post the circuit schematic somewhere for others to use.

I have a Peavey Classic 30 that I couldn't get any MFX units (previously my GSP1101, currently my Helix LT) with a 1/4" channel switcher to actually switch the channel on the Peavey. Seems there is some potential on the type of switchers they use that the Peavey, and apparently some other amps, can't handle. So I built an optocoupler circuit to isolate the Helix switcher and Peavey channel jack and got it working.

Any resolution on this? I just got a Helix LT and am having the same issue unsuccessfully trying to get it to change the channel on my Classic 30.