I'll just translate what I understand from this Chinese website on the impressions of A2000Z:
[COLOR=333333]Soundstage of the A2000Z is wide, vertical soundstage is narrow, vocals placement is near, beside the ears.[/COLOR]
[COLOR=333333]Soundstage is "traditional" and does not perform well in conveying the naturalness and intricacy of larger ensembles, however f[/COLOR][COLOR=333333]or a flagship product, instrument placement and separation isn't an issue.[/COLOR]To date, the analytical capabilities of the A2000Z is the best Audio Technica has ever achieved. It has very high quality thus I speculate it is the result of the newer production units.
[COLOR=333333]The [/COLOR][COLOR=333333]A2000Z is not as warm as the W3000 & A900XLTD but colder, with clarity outshining its performance. It does not have the piercing highs and messier details of the A2000X. [/COLOR][COLOR=333333]Very good treble extension, smooth and transparent, without sibilance. Compared to the[/COLOR] [COLOR=333333]W1000Z[/COLOR][COLOR=333333], the highs are more extended and concentrated. [/COLOR][COLOR=333333]IMO it performs best in midrange. Simply put, it has thickness and concentration. Vocals on the A2000Z is bright and highly concentrated, not flavorful like the AD2000X but has qualities more similar to AD1000. [/COLOR][COLOR=333333]Bass quantity is light, non intrusive, deep and tight. It can be said that its ba[/COLOR][COLOR=333333]ss quantity sounds balanced out like its predecessor.[/COLOR]
[COLOR=333333]Overall it performs excellently on Japanese female vocals and smaller ensembles. [/COLOR][COLOR=333333]The A2000z is a classic piece of Japanese headphone, smooth and elegant, not energetic like the Sennheisers, colored like the Beyerdynamics. [/COLOR]
Thanks for the translation! Matches with my impressions of the A2000Z that I heard at Canjam.