Re: When it's too loud.....
The truth is that it will always be "TOO LOUD" as well as "NOT LOUD ENOUGH" at the same time!!
People in the audience will have different perspectives about what they deem "loud"
I think the main thing to remember is to go with the opinion of:
A. The person that hired you
B. Manager/tech of the act you are providing for...
There will always be that disgruntled audience member that wishes to interrupt your train of thought to present his grievance. Turn smile and say, "I agree it does sound good" then turn back around and act like thats all you heard.