Hmmmm, though I agree with this in some sense, I just get the feeling it's over simplifying or some how missing the actual substance that high quality EQ can bring.
And the last part, the addition of an "extra" filter and the "break" of bit perfect transmission, I think these are the traditional outlooks on EQ'ing and why audiophiles stay away from them. What we can't argue with in reality is that EQ is used and is used to great effect in mixing, mastering, film, and live music, those are the places where real money, real time, real jobs, and real enjoyment take place, yet we audiophiles steer away from it in general because we feel it's "ineffective" and "taints" the music.
It's an outdated view, but unfortunately I find that EQ'ing is a challenging task without much easily accessible information in the home audiophile market, so those that do try quit too early and never see what can be done. This isn't one of those topics you can just follow a guide on and fix up all your gear, it takes trial and error and time to learn. I'm no guru though, I'm just a new guy to it that's seeing and hearing some cool stuff that I would love other people to take a shot at more often so that we could all learn from it. So we don't need you to ask me to "lay out all the secrets of EQ so that anyone can do it", because I can't.
I'm happy to have different views on a subject, I just have the feeling that you're washing out the substance of what high quality EQ'ing vs. an "extra" filter that has disadvantages is. I'm not going to debate this, but I didn't want to leave your comment unanswered after you took the time to answer mine.
We can return to the HEK talk now.
On the note of build quality, I'm in the camp that this version is better than HiFiMAN's other headphones, but has a long was to go to get up to level of more established and mainstream manufacturers. My new Oppo PM-3 are amazing well built, and for the money I'm blown away with the sound.