If you have two (L + R) feeds with different mixes in each.. then "technically" it's a stereo mix even if both feeds are identical. You are doing what we are doing with our X32 IEM mixes, but we only using single (hence mono) XLR feeds to each of the 5 IEM mixes. I've been considering trying to use 2 XLR outs, but I don't have access to the mixer to "play" with it to set it up correctly - only can get to it before gig time. My research has indicated that when "syncing" 2 output busses.. level on bus 1 is output, and level on bus 2 is panning.. so not sure how I get guitars panned L/R in that scenario.Hmmm, I wonder if I'm approaching this the wrong way. I run my IEM stereo. That is I use the x32 rack and I have my in ear plugged into XLR outs 3 and 4. So I use sends on fader to put what I want mix wise in which ear. Now is that stereo? I don't know but I do not hard pan anything in my mix. I simply mix what I want in each ear.
Is this how you guys are doing this with your x32's?
And yes, when mixed on console.. we use "sends on fader" (+ output buss controls such as compression, EQ, etc. as needed by each member) when we're not doing remote IEM mixing with our "i" devices. I mostly mix my IEM's with my iPad.. only use the "sends on faders" method if the connection gets dropped.