http://www.head-fi.org/forums/4233707-post19.html

I've seen this for nth time, how true is this statement?

I believe it's just for Sennheiser Europe.

Also, I wouldn't add too much weight to it.

Sennheiser in Australia recommend the Lehmann Black Cube Linear, I consider it no coincidence that the Australian distributors for Sennheiser and Lehmann are the same company.

I don't know what it's like in other parts of the world.

dc's explanation sounds pretty logical to me. supporting whatever's affiliated with their distributor.

Though, even if it was voiced to that thing, what's to say that's the sound you like.

graham prefer the audio technica phone on his amp then other brand, this is stated in one of his post from http://rockgrotto.proboards39.com/index.cgi?board=149