Audio is subjective and so are volume levels?? HAHAHA just kidding. Rather off topic, I wonder if any of the big brands will come out with a planar or if a new company would show up.
The one reason I generally avoided HFM headphones were due ro what I heard to be a lack of soundstage depth. I sincerely hope that the HE400i and the HE-560 more than excels
Smh. Lol. Who knows. Oppo is one that I know of.
Depth on the 560 is great, quite a noticeable amount more than the 400i from what I heard from a user that experienced both, although both of their depths beat the AKG's (dunno about the 812 tho).