I agree, the IEM’s offer a more accurate representation of what’s going thru the FOH. And if its not satisfactory through the IEM’s, and the soundman says its not satisfactory goin thru the FOH, then its simply not satisfactory. My point was, IEM’s are a different animal to traditional stage amps, and many prefer the stage amp as monitor ( which in many cases, amps act ONLY as stage monitors) vs IEM’s. Took me a while to get used to them, and I went thru a trial and error of 6 different models including multi driver custom molded IEM’s. Ultimately, I found the single driver sennheiser with sonic foam tips provided the best bass response, and they were cheap ta boot.I respectfully disagree that how a stage amp sounds on stage is a more accurate representation of the sound you're getting out front. You get coloration from the amp, the stage acoustics, room acoustics etc that don't necessarily translate 25' away in a crowded room i.e. I've found that how it sounds in my iem's is usually very close to what I hear in board recordings, which IME is much closer to what it sounds like coming from the PA. If it sounds good in your ears it's much more likely to sound the same or very close out front. In my experience anyway. Trust your in ears, that's what's going through the FOH.
Either way, the MetroExpress came to the rescue that day.