Wondering if your friend, and you are powering the HD 600 with anything special?
I've been testing out the Aeon opens and the Gilmore light mk2 today. I'm trying to reserve judgment but thus far wrestling with what I hear as the Aeon have a bit of a U shaped character.
On 1st impression (which I've come to trust) may not be ideal for my mixing needs, but I'll keep listening a bit more.
After coming from the LCD X's I have to wonder...what is it about these otherwise fine HP's that the designers are compelled to not voice them more truly. Of course this is just my opinion.
Maybe the challenges of creating such a balance are much more tricky than I can imagine. I'd guess that may be.
Not a fan of EQ'ing so to me, If they could just give a wee nudge in the upper mids dept...