I had issues with fatigue on the MA900 oddly on everything I plugged it into, some odd grain in the upper mids and lower treble that really wore me out and it became worse the more often I used the headphone, it's why I ultimately gave the headphone away. The only time the K612 was fatiguing to me was on the amps or tubes it didn't like. I have heard other people complain fatigue on the MA900 too. Quite interesting how different headphones effect different people.
That is true. It's why there is so much debate about what flagship headphones to get. Some will swear by a headphone and others will absolutely hate the same headphone on the same setup. Every reviewer has their biases, no matter how unbiased they try to be. The problem with getting into high-end audio is that it's so much about trail and error finding what you want, this is basically what we call the audiophile journey. Sometimes experiencing something new in audio may completely shatter your long-held beliefs about something and go against what you read about something or even previous experience with something.
It's funny as I don't find MA900 nearly as fatiguing as K612.
But I am sensitive to sibilance. Both perform very well to my ears. Different signatures. But K612 has more sibilance than MA900. Everything else is satisfactory and up, just that...
But as people say, nearly all neutral dynamic headphones have a bit of a harshness or sibilance in the treble though I'd much prefer the former to the latter.
Plus, I am sensitive to it so...
Edited by conquerator2 - 4/20/14 at 1:39am