I just impulsively bought the MDR-MV1 yesterday and got it today. I also bought this cheap 4.4mm cable (
https://www.amazon.com/dp/B0C3C242T9) and it seems to work just great with my DAP.
I was a little concerned with the treble peak, but I've tried to put on some of my brightest test tracks and I haven't been bothered by it at all. It's clearly more defined in the treble range, but not sibilant or harsh for my ears. I tried tracks from Norah Jones, Fleetwood Mac, Rhianna, and some EDM stuff and it didn't bother me.
The bass is quite big for an open-back and I was surprised to hear good subbass quantity on this headphone.
My favorite part is just how amazingly light and comfortable these are! It's 220 grams and suede pads! oh man. I wish all my headphones were this light and comfy! It is even more comfortable than my beloved HD600, and much lighter than my Susvara!
Anyway, not a huge fan of the build quality, but if you wanna make it light, you gotta compromise here and there. The "Professional" stickers are also not aligned very well, but I may end up taking those off I decide to keep these (which it seems I will...)
Obligatory graphs I measured tonight:
https://headphones.audiodiscourse.com/?share=Antdroid_v3_Target,MDR-MV1