Plugged my ODAC into a powered USB hub (from the original Rock Band), listening to some stuff... the highs are actually a bit fatiguing, sibilant at times. The DT880s have crisp highs but aren't piercing. I'm already feeling a bit apprehensive... I'll be burning these in tomorrow when I'm at work but I'm afraid I might not like their sound. They have good detail retrieval -- in fact, I think I've heard some stuff with these already that I haven't heard even with my DT880s, which I find hard to believe, but maybe they really are that good. I just wish I didn't feel like I have to EQ down the treble to make these enjoyable to listen to for longer than 30 minutes. I might have to stretch out the headband just a tad as well, as I feel they are a little tight. Not nearly as bad as my HD280s though.
Hmm looks like I'm having the same experience with you. I can't listen to the HE-400 for more than 30 minutes at a time too. Starts to hurt my ears if I go past the half hour mark.
@ evowei and yokken,
Please report the treble issue over to the Hifiman customer service thread, we need this recognized so they do something about it.
Alright, will do. Now I'm in a dilemma: which one to return? :/