I have had my HE-400s for about a month now and I'm experiencing fatigue and slight ringing that I have never dealt with before. I've used K702, Pro 900, DT 770 and never had these issues.
I'm guessing it is an issue with the treble on these? I'm thinking the most logical solution is to sell these and pick up a different pair. Is the LCD-2 more subtle in the treble? I really enjoyed the planar sound so I think the LCD-2 would be good for me.