Well, mine are about 60 hours in now, and boy do they sound different.
I wasn't really truely a believer in burn in, thinking I don't know sound well enough to hear a difference, but man I was wrong. They sounded almost muffled or tinny (somehow at the same time) at first, but now are brilliant
And take note about the felts "burning in" too. There was a huge sound change after a few days. Im using 2 notch white, not because I like bass, I just listen at rather low volumes. That being said, it's crazy how much volume changes the sound, I can see why Dan included tuning bits.
Comfort wise, there are very good. I wish they had the gimbals that the original Ethers had, although the CXs don't have angled pads, negating the real reason for such a gimbal, it would have been a nice touch. I have a fairly slender Italian head and face, but with high Haida cheek bones, so they fit pretty darn well thankfully. But for those with different shapes or if they want to swap pads it would be helpful. However I'd imagine it's one of the more expensive parts to make l, so I do understand
My left cup seems to be more open sounding in a way than the right. No one but me can hear it, so it may just be my hearing. Placement doesn't seem to change it. I did drop them about 2 feet onto a rug, I can't imagine that would do a single thing. Besides like I said, no one can hear it but me heh.
@mrspeakers did the CXs go through the same driver matching as the original Ethers/Flows?
(Either way, it's the most match headphone I've ever heard. T50rps and 4xx are crazy off.)
They respond rather well to any power source. They don't thin out much on low power device, and can easily pump the volumes I normally listen at. (Unlike t50rps that require its own nuclear power plant).
They are very revealing, you know you're listening to a bad dac or a bad file, however they don't punish you for it. Some cans and speakers are unusable unless you have the right sources. But I will happily plug these into my $200 tablet and watch Netflix or my Modi 2 and Mangi 2 and listen to some Flacs, and have a positive experience with both.
The past 2 days or so they have really started to open up in terms of sound stage. I wouldn't go and say it's massive, but they are closed cans. Imaging is great, and watching movies with them it's seriously good.
These are my first truely high-end set of cans I've owned so I can't compare, and other high end cans may do the same.
They seem like chameleons, they don't do any single genre of sound badly. Movies, metal, classical, electronic you forget you are listening to headphones. With my Open Alphas or 4xx somewhere in the back of my mind I'm always aware of what hardware I'm listening to, and they are better at certain genres then other ones. With the Ethers, that just kind of goes away. Like I said, that may be a characteristic of all high-end cans, but I can't speak for that.