Run this test. In Dual mode, connect your guitar to Input 3 and connect Out 3 to one amp and Out 4 to the other amp. My favorite algorithm to test stereo is the UltraTap using the “Stutter” preset which auto pans the taps back and forth. Do you hear stereo in this simple setup?
OK when running the guitar into input 3 with the stutter preset (and other presets) I get stereo out from out 3 and 4 – and when I go back to my previous setup with guitar/pedals into input 1 and return from the switcher into input 3 – I got stereo out from out 3 and 4. For some reason my set up now works just fine!
Thanks for all the help!