I swear there must be a different version of the HE-6. I can not ever get my pair to give me any kind of treble too emphasis at all. I know what treble emphasis sounds like to... "T70s, Pro 900s" to name a few. The HE-6 don't come anywhere close to either of these.
What's the deal.. New or different version or what?
I think it's just because the headphone takes quite a bit to drive, and many people are under amping it, hence the splashy highs. Also, I do find the sound varies quite a bit depending on the chain you're using; maybe because of its very neutral frequency response.
But I'm one of those who acknowledges it can be bright, however, it's never ever harsh. It's just very resolving and some people don't necessarily enjoy that. I love it, and I want to hear everything the artist/producer put into the record.
Ok, I'll probably have to take that comment back. It is possible that the speaker amp that I tried HE6 with was too bright. As with any headphones, I really need to try HE6 for at least a few hours with several different sources and a variety of music from different genres to make a solid judgement on them. First impressions often don't mean much if anything. Sorry about the reckless comment guys.
If you run the HE-500 and HE-6 through the same set up (one that can drive the HE6 reasonably), you'll realized how similar they are more than anything (to me anyways while I still owned both). It's just that the HE-6 is more transparent, faster, images better, and obviously adds to the highs, giving the impression of less bass quantity. The bass response to me is more controlled and real, but not as visceral as the HE-500's with the mid bass hump. The HE-500 is an amazing headphone, and I miss it sometimes. The forgiveness of it while maintaining outstanding SQ is very impressive.