Finally got to hear the CRBN at the Toronto Audio Fest. I camped out all morning at the Audeze booth and listened to the LCD-2, LCD-5, and CRBN since I wanted to know how they compare to my LCD-XC. I have very little experience with 'stats since I don't know anyone in my area who has one, only ones I've heard was some entry level Stax (crap) at a meet like 20 years ago and a SR-404/SRM-717 combo a fellow head-fi member had. 404 was nice on some music, but dynamics, impact, and bass were lacking, it couldn't rock or boogie.
Show conditions so can't really tell much about low level detail or resolution, once I got to around the LCD-XC level it's all fairly similar, I'm not going to pretend I heard a bunch of details or room echoes in the LCD-5 or CRBN that I didn't on the LCD-XC. But the good news is the CRBN can rock out to Black Sabbath and Motorhead, and it can groove to Bob Marley though I do wish it had a bit more bass & impact like the LCD-2 or XC. Soundstage is nice, perspective seems to be a bit further back which I prefer, the LCD-XC sometimes puts me right in the conductor's position in an orchestra which can sound a bit wonky depending on the music.
Overall, it sounds like an Audeze which is a good thing. I think the LCD-5, XC, and CRBN are more alike than different, being a closed headphone the XC has a sizable advantage in show conditions so I'd definitely want to spend more time with the flagships in a nice quiet room to hear how well they can resolve low level details, room boundaries, and all that other stuff that's hard to hear in a noisy room.