Maybe slightly off topic, but are there any live sound engineer here? I don't do this full time now but getting back to it occasionally. In my world Yamaha digital mixing board are just about everywhere, and their headphone out impedance is 15 ohms, don't ask me why. Yes brining a headphone amp is an option, but really, anybody that does this job knows how unconvenient this is it's in the way, extra cabling, you don't know where to put it, and it's quite critical in festival style event since you don't have time and more and more you're only allowed a headphone sound check.
Basically I'm on the market for highish impedance closed back with good sensitivity and good isolation, I know it's not these, but I'm quite surprised at how many fellas use this or 7506s in this situation and frankly they sound like cr*p with this kind of output. Or maybe I just don't like them and it's a bias and I put too much value to this impedance mismatch.
Weirdly most of the pro targetted headphones have low impedance, but the Beyers 770 or 1770. My question, is that it? Is there simply no shopping to be done and it's the only decent option for PFL monitoring? I find the 770 ugly, and I find the 1770 expensive.
I'd like to see those measured one day, if possible, but not that it's such a criteria but Beyer didn't get much love here when some where evaluated, I am just surprised that there would be no competition. Or maybe I am missing a gem that some knows about? Do people, despite the technical apparent mismatch do love the m50s for PFL monitoring?