No. It's dirty pool, a cardinal no-no to monkey about with a fellow musician's gear like that.
Guitarist eh ? Well, that's why most live sound engineers ( which I made more money whoring myself out as) are bass players.
And for the record, every band I have ever been in except one was MY band. And the band in question, my last band, was absolutely my band. And my two bandmates deferred to me. Know why ? Because we were good, we sounded great and we got paid. And all the gear except the drum kit and my guitarist's ( who is also my best friend) amp and guitars was mine. See my guitarist was very good. He was also the singer. Dude could play and sing RATM ( any of it) at the same time and do it well. Problem is he is also a stoner. And like most guitarists he thought the way his rig sounds when he's by himself translates to good sound with a band, in a bar. And the knob incident became irrelevant when I started putting everything into the FOH. I often mixed from the stage and I would go out front every so often or put another guy I know and trust out front to tell me what needed to happen. It really only took for my guitar player to go out front and hear what he sounded like a few times before he figured out I know WTF I'm doing. We sounded better with me mixing from the stage than most bands did with a guy on the board out front. And most of the time that includes when I paid someone to run my PA rig from out front. And yes, it was a major inconvenience for me.
Generally I had a 57 on Jason's Marshall and a Senn 865 for his vocal mic, a Senn 421 on my Ampeg SVT/810cl and a Reddi ( DI) straight to the board from my amp and a 58 for a vocal mic and 13 mics on Dave's extremely large drum kit. 2 Snares, 2 Floor toms, two kicks, rack toms, rotos, 2 hats, etc. Ever close mic a drum kit on stage in a bar with 13 mics ? I did it all the time. And every band in town wanted me running their sound.
3 piece hard rock/alt band. Think Deftones, STP, Rage, AIC, Nirvana, Offspring.
beer bottle brand on the right on the equipment.
