I just got them last night, so, no, no stage tested. It did isolate me just fine with my wife watching tv in the same room at normal volume, and not listening to her at all, when she spoke, so I guess it's good enoughNote the "_":
And, like me, you'll never unsee it now.
Back on topic, have you tried the Chu's in a high volume setting? As in, how well do they block out stage volume? I'm stuck in that analysis paralysis land of Protecting Hearing + IEM volume = Conflict of Interest and hoping to find a set of IEM's that don't need to be cranked to overcome external noise levels.
Seriourlsy, I don't know how would these work with a drummer and/or amp on stage. I was feeling isolated enough so as to not be disturbed by the TV and be able to concentrate. The sound quality on the other hand, absolutely superb. They're like 18$, so it's not much to gamble to see if they fit your scenario.