My 900's arrived yesterday and here's my initial thoughts:
Disclaimer: The 900's are my first foray into the high(er)-end audio scene (previous to these I used iphone earbuds and Skullcandy Ink'd earbuds - so the 900's are a HUGE step up)
First thing I did was hook them up to my iphone5 and play BT - Tomahawk (Trance/EMD). I was amazed with the bass and I heard sounds I've never before noticed in the track. However, I finally heard what I already read about these cans: piercing highs.
I then switched to Anberlin - A Whisper and a Clamor (Alternative Rock) and was really disappointed. I knew from other reviews to expect that the mids would be recessed; but wow, I wasn't expecting an almost non-listenable experience.
So, 14 hours of pink-noise burn in later: a world different experience. The highs of BT - Tomahawk were more controlled, bass seemed tighter, and generally sounded wonderful. Moving onto Anberlin - A Whisper and a Clamor, I was really, really surprised at how well it sounded. It was a hundred times better. The mids were present and audible (even over the booming bass) and I was amazed with the clarity of the male voice. Needless to say I was relieved.
I know having a proper DAC+AMP will yield an ever better experience and those items are on my black-friday shopping list. But, if my iphone5+900's can sound this good, I can't imagine what a real DAC can do.
Lastly, considering the 80 hour burn in time these need - I can't wait to see what they sound like then!
Edited by Coffeemonster - 11/9/13 at 5:41am