I have heard the whole beyerdynamic-lineup except the MKIIs of the DT 1990 and DT1770. And I stand by my opinon that the STELLAR.45-Drivers used in the DT 900 Pro X and in the DT 770 Pro X are the best, beyerdynamic makes. Not in pure technicality or resolution. The T1.3 and T5.3 are among the most resolving Headphones in the market. The problem: They do not really sound like it with music playing. They show you very flaw in an amp or a DAC, but man, I do not really like their tuning!

The DT 1990 Pro MK1 and DT 1770 Pro MK1 were very good performers, with a better (to my ears) tuning than the flagships, but still they were somehow too cool, unseemly "scratchy" sounding on many tracks. Technically superb, but enjoyable? Not so much for me.

I always liked the old DT 880 Pro and the 990 Pro and the 770 Pro. I liked them bestter than the higher end offerings from beyerdynamic. This still holds true today, as purely from a sonic viewpoint, I think the DT 900 Po X are about the best Cans you can get for around 200 bucks. Wonderful sound, wonderful tuning, very capable dynamic drivers. The only problem: Quality control. The Headband of my DT 900 Pro X practically fell apart after a few months. I will see if this also happens with the DT 770 Pro X. And before you ask: I treat my headphones reasonable careful. But these, the DT 900 Pro X and the DT 770 pro X, are ment to be workhorses in the studio, so... do better, beyerdynamic! Really, do better! Important part of your whole shtick is "German Quality". Live up to it!

Now to the sound. And these are just first impressions. The DT 770 Pro X ist not as "romantic" like the DT 900 Pro X. With the closed back 770 Pro X you really hear what they were constructed for: Tracking, recording voices and looking for flaws in a recording. They have a surprisingly wide stage for closed backs, almost as wide as the open back Sennheiser HD 600, but still a bit boxed in compared to truly open sounding cans. They are very linear and do not emphasize frequencies over others. I would call them neutral.

They go deep, but they never, and I mean never add bass where the source does not have it. And the bass, like the other tonal registers, is very dry and will not make you dance. Which is fine as this is not the Job of the DT 770 Pro X. Mids are good and clear, but far from the mid forwardness of some other offerings on the market. The highs do NOT bother me, but they never did with beyers. I think this whole "beyers are treble murdering machines" is BS. Everything in the DT 770 Pro X sound very well defined and fleshed out, but you will not get goosebumps from certain instruments or voices. Goosebumps would be unprofessional. :-)

So, who are they for? For Studios and Podcasters and for any other content creators. But also for Audiophiles who need a pair of closed backs.