Thanks Boringer, just posted the link on the ASP Facebook page. One thing I think I might add that explains the grain he hears with the LCD X is that I find grain on my LCD 2's as well. I don't experience grain on any other headphone including my ultra revealing ER4S's.
I wonder if it is the cleanness of the amp revealing a sonic signature in the Audeze's that other amps do not show, especially solid state amps.
I understand what he means about bass depth though. That is not an issue for me as I am not a deep bass person, more a texture bass one. It does not surprise me he finds the 900's a great pairing in that respect as they have substantial bass and probably balance out more with this amp than any other.
Excellent honest review though I thought.
I think you may be right Ian, with my 900's there is no 'mellow' or 'grain' whatsoever in describing its sound. Quite the opposite, in fact. Which is part of the reason I love the combo.