the soundman is supposed to mix the sounds so that the audience hears the band. the soundman should not interfere with the bands sound and character. otherwise, all the bands he mixes will sound the same. the guys making 5-6 grand a week mixing bands who have sold millions of records would never even think of doing such a thing.
Says it all.
The BEST sound people listen to the band on stage(or in the studio) and try their best to duplicate that via FOH(or CD).
FALSE. well, sometimes false.
As a soundguy I often have the bass player turn the stage volume completely off, listen to the FOH tone, and ask them if that's what they're going for. Sometimes the bassist will suggest more mids, or whatever, and I'll comply. Then I have them mix the stage volume back in.
However, there are many instances where this simply won't work. As mentioned it's not usually the band who gets final say. It's the client, the promoter, the bar owner, the gear owner, etc. Many times they want different things then the band wants. And everyone thinks they're the most important one. The soundguy then becomes the mediator, trying to please as many of those people as possible.
Then there are the inexperienced, young, or tone def players who don't know what sounds good, or just think they do. Then I'm doing everything I can to
fix their horrible tone. Just taking what's coming off stage and amplifying it could piss off the client, torment the audience, or even damage the PA.
My point is that many times the soundguy has to be a psychologist also. Figure out when and who's opinion to take, be it the bassist, the client, the owner, or their own.