I own these headphones now since mid of December. I would like to share my impressions with you.
For now I tested using an RME ADI DAC-2 FS (main device), Scarlett 816 3rd (two headphone amps, used for direct comparisons, the line out is somewhat shrill but the headphone amp seems to be fine to check the level of detail and stereo imaging of headphones), and Apple Lightning Dongle. I burned them in for about 30 hours.
These headphones were imho made for a certain purpose: recording and monitoring. This is exactly what I bought them for: during live sessions I do need good sound isolation, a more or less flat sound signature, I need to be able to detect muddy bass and midrange humps, and I need a tool to detect whether a De-Esser is needed to deal with ugly sibilances. I do not need at all a Hi-Fi headphone that turns bad music into something beautiful.
I have a relativly large head, and I am sensitive to aggressive highs.
They feel comfortable on my head. When I start using them I always think it could be a little less clamping force, but after a while it is kind of ok. The good thing is that you can move around, and the headphones will stay whereever you placed them. I can even lay down on my couch to some extend.
I do wear glasses, and it is no problem at all for me with the headphones on. The sound also does not change with or without glasses for me.
The headband is comfortable. I do not like the headband of a Denon 9200 for example.
My left ear touches the inside of the earcups slightly. This never happened to me before.
The sound signature of the Austrian Audio completes my collection of Audio-Technica ATH-R70X (open headphones), Audeze LCD-2 Classic Closed and Apple AirPods Max. I use all of them for a reason. The Apple APMs are only acceptable to me when they are EQed with a special iOS profile.
The headphones sound neither too dark or too bright to me. Bass is rather on the neutral/dead flat side, as written above. Voices sound balanced. The heights are ok - personally I prefer neutral or dark headphones (no Beyerdynamic or Sennheiser).
Some feelings with tracks that I know pretty well:
„44/876“ (Sting/Shaggy): bass is present, the voice are clearly to be heard, heights are just a tad before getting too bright (which is perfect for me)
„El Cuarto de Tula“ (Buena Vista Social Club): stereo effect is there, it‘s not a super-comfortable leather chair that you sink into, it‘s not an analytic sound, it just sounds ok
„Comfortably Numb“ (David Gilmour, Live at Pompeji): everything is there, again it‘s just close before getting too bright, the intro voice (before David starts to sing) has some artifacts inside that I can hear clearly
„On the Road Again“ (Katie Melua): the voice is rather on the bright side (as it should be), some artifacts in the voice around 01:30 are clearly exposed as expected, the following part until 02:00 is super relaxed
There is a comparison between a Neumann U67 and a Microtech Gefell microphone on the german site Bonedo - through the Austrian Audio headphones I can hear that the Neumann fits just right to the singer‘s voice, while the Gefell has a slight mid hump.
Comparing to the LCD-2, it‘s impossible to resolve the super-subtle differences from listening to classical recordings that I know. I excluded chamber orchestra recordings or large orchestras in my comparison, and also did not dive into Jazz music. „Love Song“ from Melody Gardot was rather lifeless in direct comparison, but of course everything is there and I can check the reverbs. „Tokyo Dance“ from Tingvall Trio shows all the instruments and their perfect tonal balance, but is also lacking the „wow“-effect. Maybe I could try to EQ the bass.
Please notice that the LCD-2 resolves details in classical music in a way that I never heard before. The Austrian Audio HI-X60 is neither better or worse compared to the Audio-Technica ATH-R70X when it comes to orchestras, and I am lacking details here.
Alternative, Rock or Metal sounds really good, as long as the recordings are good. This is superior to the LCD-2, of course.
Stereo imaging for me is on the larger side, but still natural. The LCD-2 offers a giant sound stage to me, in the Austrian Audio headphones it‘s a little more relaxed. Voices are never inside my head.
Build quality is outstanding. The black and red look is appealing, but I have to admit that the look is more like „made for the road“ (or studio) rather than „made for the high-end living room“.
The original carrying case is a little bit large. I do have a pouch case from f-stop which is a little bit smaller, and where these headphones fit in when folded with cable attached. The headband adjustment does not change when folded.
The isolation of pink noise is comparable to the Apple APMs with ANC, which is imho spectacular.
My ears get warm when wearing the headphones, of course it‘s a closed design, and probably because of the larger headband pressure to my large head. Maybe things get better here over time.
Finally I am looking forward to use these headphones during live performances. To me it‘s also a complement to my main headphones, the LCD-2 (for Hifi listening, and also checking reverb effects and transients) and the ATH-R70X (for long sessions, or stuff to be done in summer).
I found that using the Apple Lightning Dongle is not really a good thing with the Austrian Audio headphones. With my Hidizs DH80s plugged in to the Apple zoo and Qobuz the Austrian Audio sounds way better. It outresolves the Audio Technica clearly - even tried an alternative cable with the Audio Technica.
Because of this I think I have to correct my initial thoughts.
Austrian Audio is still a headphone which clearly tells you if there is something wrong in the music. Otherwise it is a joy to listen to it.
On my head the comfort is still neither better or worse compared to Audeze LCD-2, because Audeze has much larger earpads.