jpetersen
Very stressful job.
#1 priority is: don't let feedback happen. Sometimes you have a desk with a mid parametric but not always.
So all the "experts" will say, easy! Turn it down! Right. Tell the band that.
Personally I prefer a 1/3 octave graphic strapped across the mains after any compression for that job, preferably one with an indicator per band that can show me which bands are running wild. More surgical and very quick because there's no need to start trying to track down which mixer channel needs adjusting.
jpetersen
Next: Guitar amp stacks so loud, the bass doesn't even keep up.
So I tell the guitarist: Turn that down, please!
No way! The tone only comes when the speakers are at their limit.
Hoo, boy. So get a 30W combo - yeah, I know. Not as macho as a solid wall of Marshalls.
I try get guitarists to turn themselves down by putting them very loud in their own monitors.
Sometimes it works, sometimes they revel in their own ego.
I'd just like to give a very special mention to the sound person who told me that my guitar amp was way, way too loud for the 500 capacity room. The FOH PA being a full-range 8 kilowatt system, 4K foldback and the guitar amp a 5 watt Epiphone Valve Junior turned about half way up.
Eventually we realised he was actually complaining about the piano, which was at the volume he'd turned it up to. :-/
jpetersen
And the guitarists turn themselves up as the evening progresses.
Usually the result of an unavoidable hearing shift that takes anything up to 30 minutes to kick in. Assuming the holdback mix is any good to start with and is holding its own against echoes coming back off the FOH rig that's the most common cause of people wanting the foldback turning up all the time. That or my personal hate, musicians/singers who soundcheck quietly and timidly then let rip once in front of an audience, so destroying most of the point of having a soundcheck at all.
jpetersen
What the heck can one do.
If the band's doing more than one set, try turning the foldback down 3dB between the sets. They'll want it raised again in due course, but you're starting from a lower point than you left off.
If the guitar amp is too loud to go in the PA, maybe don't put it in the PA. Unfortunately telling some guitarists that two or three cranked 100W Marshalls or screaming Twins was only done that way back in the 60s/70s because the PAs of the time were really meant for vocals only so the guitar volume was very dependent on the backline amps is wasted on some. The rest of us, when we want a cranked or breaking-up amp sound, use a smaller amp between 15 and 40 watts as you say. Easier to carry, less hearing damage, a consistent tone because it's always run at the same level and so long as it can compete with the cymbals for stage volume plenty powerful enough.
One trick that's worth trying with an over-loud guitarist is to turn their amp so it's projecting across the stage diagonally, not straight at the audience. And if you've a 4x12" cab pointing at the mix position, take a walk around before judging the guitar volume in the mix. 4x12s have a very narrow dispersion and can be deafening in front of them and much less audible a few feet to the side (and bass heavy). The closer you are to the cab the more that happens, and sometimes guitarists who can't hear themselves are off to the side of the cabs and out of the dispersion pattern. They can fix that by getting in front of their amp. Which in turn means they'll turn it down if it's blasting their head off. For the same reason, get any guitar speakers off the ground or they'll be blasting the front row of the audience but the band can't really hear them unless they keep their ears where most people have knees.
jpetersen
In the end, when the sound's good, it's a great band.
If the sound's ****e, it's the sound guy's fault.
As far as the audience is concerned, it's rarely the sound engineer's fault. Because most people have no idea at all what sound engineering is or what engineers do. Other than say "one two, one two.." into microphones.
A good system run by a good engineer can make an average band sound huge, a good band with a lousy PA/engineer can sound spectacularly bad. Being on stage with a rubbish foldback mix is horrible, and doesn't inspire the slightest bit of confidence about what's coming out of the FOH system either. For any venue where the main sound is through a PA, not backline, the band are completely depending on the sound people to get it right.
It's a two-way thing, each is dependent on the other. And it really helps if the band understand PA and the engineer understands what musicians need to hear on stage. And, going back to my earlier comment, if the engineer can tell the difference between an electric piano and a slide guitar/lap steel.
jpetersen
I hate this job. I very rarely volunteer anymore.
For some reason the jobs you volunteer to do to help someone out often turn out to be the worst nightmares that you carry with you to the grave. A phenomenon not limited to music or engineering either, it seems to be one of life's universal truths.