Some quick impressions...
I'm listening on my modest setup to a variety of well known tracks from years gone by! Keep in mind this was an open box purchase, so I don't really know how much burn in time these have or if it really matters with planars.
TIDAL HiFi/MQA -> PrismSound Lyra2 ( ASIO ) -> Monolith THX AAA 887 (single ended 0.5ohm OI)-> LCD-4z
The first thing I immediately notice, is how balanced and neutral these are, with just a hint of mid forwardness. Nothing peaky stands out right now. If anything 'ch','sss' and 'fff' sounds feel less harsh. They sound more natural, like someone is in front of you actually enunciating.
I get a sense that either my setup is lean, or I've been perceiving distortion as more bass in the mix with other headsets I own. The bass is there but it's not dominant in a lot of familiar tracks. I almost feel like I could turn it up some, but perhaps that's the 'consumer' side of me & my brain needing time to adjust. Tracks feel leaner but less bloated. Less like there is this low/lowmid blur around everything clogging up the space. If I put on some deadmou5 or some current pop hits, I can definitely hear the sub bass working away.
Everything has more space. It's not congested. Some of my favorite warm & muddy tracks actually have room to breathe. "No one knows" by QOTS is a great example. Really busy passages don't seem to get all glued together and become a mess. You can still hear individual instruments & voices in their spaces during a heavy mix. Reverb / cymbal trails go on a lot longer. I can hear things fade into the mix earlier than I've ever noticed before. There's a lot more pin point detail overall.
Overall so far, I'm really happy with how mixes translate on these. No frequency range really stands out as being over the top. I'll have to see what the Audeze 4z EQ change does on their plugin and compare it to the stock sound.
Comfort wise, they're not too heavy, but I wouldn't want them any heavier. I may need to figure out how to shorten up the leather strap though. The back edge of the top piece actually rests on the leather and on my head instead of being suspended above the leather like the front of that band.. hopefully this can be adjusted! I may just have to try extending the pads down more and letting the weight rest more on my jawline instead of the band on the head.