I sometimes rehearse with a very loud guitarist and keyboard player. No one goes thru the PA except the singer. I am thinking of using my Rolls PM351 with an Ambient microphone ONLY. I have tested it at home playing along with the stereo and it seems to work fine. I want to try it in a rehearsal situation to control volume to MY EARS. Has anyone tried this? I know that IEMs will sound best when everyone goes thru the PA, however that will probably NEVER happen with this project.