I found HE400i has a much larger soundstage than 6xx. Am I right?
I have the HD6XX and HE4XX (Massdrop versions), and I’m using a Schiit Lyr3 with a new production Tung-Sol tube.
As I understand the 4XX is very close to the 400i in sound, but as I haven’t heard the 400i I don’t know that for sure. Anyway, to my ears, comparing the HD6XX to the HE4XX in this setup, the 4XX might be wider, but not by a lot. The HD6XX on the other hand, has better imaging and placement of instruments and is also perhaps a little taller with better sense of depth to its stage.
Of course the phones each have their own different tonality aside from the stage, which one might like or dislike.