How loud is too loud? For me - on stage (the Lefty Guy at the left, with hat) : 1 - when I can't follow the rhythm, because it is covered by loudness and usually delayed by adverse stage resonances. 2 - when I am dizzy from the excessive noise level due to the PA conducted by lousy/smoky/beery soundmens. 3 - when I have problems to hear myself playing while I'm already playing loud by necessity. 4 - when I can't hear the main tune and tune changes of the played song. When this occurs, I stop playing, thinking that it's preferable to mute than controlling nothing and being out of the played tune. When our conductor see me on stand-by, he understands that his personal feeling about something is already going wrong in the global loudness and balance is real, and must be corrected. Chris on Little Percussions, Sergio on Bass, and myself on Guitars are our conductor's "alerts launchers"... -tbln.