So, I got the DT770s in the mail today and I am trying out now. My first impressions... I really thought the cups were larger. The pads go over my earlobes. While most headphones I have with oval pads may be just a tad shorter front to back, they're a lot taller top to bottom and IMO a much better fit. I'm not sure how to feel about that. I'm not sure if that's going to cause a problem with seal or will have a negative impact on long-term comfort. I do wish they had a bit more room underneath.
One observation I made though, 80ohms on my interface. It seems to be perfect in terms of volume control. I can get fairly loud, but still comfortable volume at 12:00, and if I am listening to a particularly quiet source, I have a little room left, but I'm not going from 0 to ear rape in an eighth turn anymore. I think 150ohms would get me the full range of the volume knob, and anything about 150 (250s for example) is where I'd be needing an external headphone amp.
As for the sound. Why do I get the impression the mids are missing? My voice peaks around 200-300hz, most say it's rather deep sounding, but it sounds flat through these so I am not sure it's a very accurate representation of how I sound. So I tried them for music. I mostly listen to metal of all genres, and same thing... vocals and about the bottom half of electric guitar seemed missing as well. Details are way better than anything I had before, as I am hearing parts to the music that simply didn't exist to me before. Certain tones and notes that got lost in the mix before. I'm really not sure what to think about the sound... it's confusing.
Hmm, I am not sure where to go from here. Return and buy something else? Mods? Accept how they sound and get used to it?... Maybe EQ?
EDIT
So, I found a GitHub for AutoEQ. I Already use Equalizer APO for other stuff, so I decided I'd find one of their DT770 Pro 80 profiles to try out. I found a couple, compared them, but I found the one in the Crinacle folder that really did a damn good job at balancing these out. With these EQ settings, IMO they're worth the $150 I paid. Without it, I'd probably return them. Now, I think I'll probably keep them.
Something I noticed using these more, soundstage. It's not as good as my open backs by any stretch. However, the soundstage is good enough for closed backs that it doesn't make me feel like I have to put my open backs back on for enjoyable soundstage. I think these hit a perfect balance of soundstage and isolation. My voice sounds what I'd consider to sound normal through them now, and music sounds good too. I think over all, these are an all around upgrade over everything else I owned prior in almost every category.
