Since I basically listen to nothing but female vocals, my opinion may be biased, so please forgive me but… for the record, I trialed this product listening to kalafina, angera and KOTOKO.
I felt like with a change from II to III, the sound field from top to bottom is slightly narrower, and was more spread out transversely. Maybe it was because the vocals remained central while the instruments moved away that there was no real change to speak of in terms of vocal volume.
However, in comparison to II, it feels calmer; maybe it's the influence of the transverse spread, but any breaths or sighs in the vocals are teeming with sensuality and beguiling and send a shiver up your spine.
Listening to live recordings of the same artist, and things feel even wider and much, much more real. I myself don't listen to it, but I think this product would also be well-suited to classical music.
Since the sound that is produced is so very natural, there's no such thing as tiring of listening with these – you could listen forever.
An unfortunate aspect with both II and III is that while they are closed types there is sound leakage, possibly because of the holes in the ear pads, and because of this, it's probably a good idea not to use them on trains or in other places.
（male, 40-49 years）
When I listened to classical music and opera, compared to II, the width of the sound stage and the instruments could be heard separately.
Rock and drum attack are wonderful.
Sound transparency and the width of the sound stage feel good. High resolution.
（male, 30-39 years）
As the manufacturer extols, these certainly combine monitor-like sound quality with a vast sound stage.
There's no monitor abruptness; the wide sound field really feels good and it felt like there was really high resolution. Comparing it to II, sound seems a tad thin and weak, but listening to it on its own merits, and you get sound that is very satisfying.
If it's lacking a little in flavor, then tweaking the equalizer a little makes for thoroughly enjoyable sound.
I want to listen to music with good sound; for those who are creating music and recording, I would recommend III.
（male, 40-49 years）