Justv to clarify a few things.....
it's hard to believe that something is more accurate and natural and calmer than the Neumann ndh 30, which also has 0 full bass tones and is 5x cheaper than this one.
The Neumann is a studio monitor, nothing more nothing less IMHO, I've the AKG K872, HD800S and the NDH30 on hand here and sadly with all the hype I personally found the NDH30 in the bass department to perform rather poorly or more pedestrian....the AKG and Senn having much better definition and clarity in the bass, especially as things got more complicated and louder. The Neumann in comparison is all rather flat and way overly polite, a trait some will embrace but not for me and sorry to say not quite worth its current retail.
Head-amps for testing: Bryston BHA1 and Sennheiser HDVD800
Can’t talk about the Neumann models since I never heard them (or they are based upon that illfated closed back from Sennheiser that looks quite similar,
The headband and cups originated with Sennheiser HD630VB closed back portable from 2015, so yes they look similar, they even kept the cable on the right for no other reason than that's where the control wheel of the 630 was.
NDH30 and HD630VB
Though for what it's worth I'm not sure of the NDH30 development but it's possibly a Sennheiser design considering that Sennheiser is Neumann Berlin's parent company?
I've been given a lot flack for this, the Neumann is made in China (shouldn't make a difference) but there is no long gestation period, nothing special, the drivers are Sennheiser 560 drivers, modded or not and unlike the AKG K812, HD800S and the Composer which have been designed from the ground up for audio performance starting with the drivers the Neumann have been encapsulated in a housing that had no bearing on flat acoustic delivery for an opened back and corrected in some way with some strips of foam.
https://www.head-fi.org/threads/neumann-ndh-30.963439/page-2#post-17004201
And sad to say while I had some hope for NDH30, as I really appreciated the work gone into the HD630VB, the Neumann IMHO comes across more as an afterthought to offer their customers a headphone to match their monitor system.
From one positive review...
"After my first tests with the NDH 30 I am pleasantly surprised: the sound is certainly comparable to that of my MA-1
system, which consists of KH120 and KH750 monitors.....
..........
If you set the same volume on both, you might almost think that you are using your listening station, when in reality, you’re
using your headphones. Fascinating!"
In that light it works quite well but not something I can enjoy and get lost listening to music on, works great with movies though.
The AKG812/872 are also targeted toward professional audio but unlike the Neumann they give me the sensation of having a live mic feed, (sometimes the hairs go up the back of my neck.

) and not sitting in front of two monitor speakers.
My gut feeling is the Composer is another well designed and sounding audio product, if it has pulled back slightly from the more analytical K812s is should be quite something.
Can't remember if I asked this previously but will the Composer be distributed through audio or pro audio channels.