Tried Neumann NDH-30 at AES NY 2022. Told rep they should make it in black, with upgraded, balanced inner wiring. They say it's a possibility one day. I will wait for that. Each review I have seen anywhere, even Sound On Sound mag's reviewers who tend to be very honest, are how great these really are.
Anyway. More comfortable than the NDH-20. Slightly larger pad opening, softer pads, to better reach ears of those like me who find most earcups, on most cans, don't extend far enough. The weight is good, clamp just right but again a large head, a lot of hair. They said the drivers are closer to the ears. That's vs. NDH-20 so proximity may explain slightly better treble detail, and more bass. Bass is solid but not overdone. Warmer enough for fun while still being more analytical than typical hi-fi cans. Measurements show great bass extension that's real, not rolled off and claimed flat - like Audeze often will.
Simply the best open backs, under $1000 USD pair I've heard. They'd be a great update to my Drop HD58X (that I prefer to all their 500 and 600 series). Also prefer to horribly peaky treble HD700 and the bass lacking HD800/800s). The HD820 competes, but the cups don't extend far enough for my head.
They of course nudge out a bassier - but otherwise nice Momentum 3 Wireless I have. I still have go-to closed special purpose cans to block room noise. AKG K376 for brutally honest and flat from the mid bass up to the lower highs, with an amazing low sub bass bump and sparkle ("U" shaped signature). Then the Senn HD300 Pro. Carefully but thoroughly bent to reduce the brutal clamp and get them to extend far enough to my ears. They're truly flat & have the most gentle dip in the pain area of the high mids, resulting in accurate ease - honesty, with great treble air and a surprising sub bass extension.
Finally, rare gem with a mod. Audio Technica ATH-SR50, wired, NOT the wireless. $129 USD, Amazon. Get $20 Meze Standard pads, NOT the small. Best sub bass of all AT now. 3D staging. Forward lifelike mids, cool high mid dip for long use / no fatigue and still accurate enough. Clear highs. Indestructible.