Limiters can be set via the x32 to keep you from going into the red, cutting frequencies below the audible level might help with that as well.
Also, you could buy a Behringer P-16M to plug into the ultranet port of the x32. It's not cheap @ $300 but it gives you control over your own mix once you get it setup, and just takes a cat5e cable. Other members can buy them and you can daisy chain the ultranet connection so they have their own personal mixers as well. I've been using one and it honestly saves a lot of time and has pretty much eliminated those conversations I was having with the owner of our M32, aside from getting the initial gain level high enough to have some headroom in my personal mix. There's an initial setup hurdle, but once done, it gives any member using one control over what they hear. And setup only needs to be done once, if any other member adds their own p-16M, all they have to do is plug into the first p-16m in the chain and they have control over their own headphone output, no additional setup required after the first one is routed.
People tend to start playing harder/louder once the jamming actually starts.. so getting our individual mixes right was kind of a PITA before I put the p-16 on a microphone stand and had the owner of the m32 set it up for the first time. Now we focus more on playing.
One thing is for sure, a guitar with its higher frequencies can sound louder with less dB than we do with our low end instruments just on how our ear hears the frequency spectrum.
Caveat with the P-16m, it's only going to work with something like the X32 or the Midas M32, which is what they were designed for.. so if you ever leave this situation.. unless you find yourself in another situation using a mixing board like this it kind of becomes useless, or a used piece of gear to sell, unless you also go for a P-16I
The P-16I would have to be used to use it with any other mixer without the built in ultranet port found on the X32 and M32, and whatever that is would need enough sends to cover the band, and at that point everybody in the band would likely need the P-16M. (the P-16I has 16 1/4th inputs that can be routed to the ultranet connection)
The X32 has it's own ultranet port though, so you can use just one without it being a required piece of gear for everyone else.
In my situation, another member bought one, and then sold it to me for $200 when it was determined he wasn't a fit for the band.. so myself and the guitarist always have control of our personal mixes, and the drummer/owner of the M32 sets his mix at the board.
