Thanks for all the responses! I have had great fun trying to go through the process of getting this figured out.
This was from the Fender Rumble 200 thread…
When you get an amp head, what do you look for to know you won’t be bitten by this. @JoshFossgreen made reference to a Pro XLR direct out. Is that an actual specification? I tried to search out an answer but kept getting pointed to separate boxes.
Edit: I found it. If you look at any of the TC Electronics amp heads, there is a button that lets you select whether the direct out will send pre / post. Using the pre setting protects all the sound guys hard work. Which I find to be incredibly cool.