I used the x3 live to do it with my Randall nbking 100. It's pretty easy once you figure it out. If there's a button that switches the channels on the front you can use it to save a program change message (midi message) and every time you switch to that patch it will change the amp to whatever channel you save it to. Here's a demo I made bc I searched everywhere and called line 6 n Randall n no one could tell me. I had to figure it out on my own. So you def can use ANY line 6 product to switch your amp channels if it's a Randall. Hope this helps.
http://m.youtube.com/watch?v=BA2Wkx0Z4Wo
