Initial impressions (few mere minutes out of the box; powered by the FiiO E7/E9):
Coming off the DT 880, the sound is extremely different. At first I wasn't sure how to receive it, but then I started off with a rock/electronica song. I switched in to full-fledged electronica and I immediately grinned.
You guys weren't kidding about the explosive, but more importantly non-invasive bass. If the DT 880's bass quantity is 7/10, the PRO 900's bass quantity is easily 10/10, but not at all bloated, overpowering, and does not sacrifice the mids or wash down the highs at all. The texture is also accentuated.
I can see why people say these cans are unforgiving; you can tell that the highs have very little to no margin of error. Thank goodness I'm a lossless or nothing kind of guy. I will say the highs are very precise and have a very nice sparkle to them.
The detachable cables are very cool; the coiled cable doesn't bother me like I thought it would. Perhaps its that it's coiled tightly and for only half of the way instead of those terrible cumbersome fully and loosely coiled cables. The biggest win for me is that these are the first, and only audiophile full-sized headphones that fold. I'm not sure I'll have the guts to take these out of the house, but if I ever did, life would be very easy.
Also, these are much lighter than they look, and initially much larger than I had expected as well. Jibbie is right though; these are built like a tank. Very very comfortable.
The S-Logic is not obvious, and to be honest I'm still searching for it. If anything, I'm very surprised at the soundstage for these being closed headphones; as others have said, perhaps this is what the S-Logic does. I guess I'm just not sure what to listen for in regards to S-Logic.
I'm trying to think of what else I haven't commented on; let me know if you have any other questions. For the record, I'm not a huge believer of burn-in but I will be doing so regardless. I will however, not be Kees modding these. Just my personal preference.
Next up, PRO 900 + Astro Mixamp.
Also, +1 for buyauthorized, for anyone having doubts about them. Brand new and unused.
EDIT: About to head off to work, but I decided to pop in the included demo CD at the last minute. VERY impressed. I'll have to try the demo CD with my other headphones to see if it is either the recordings, or the S-Logic at work. I wouldn't be surprised if the recordings themselves have a lot to do with it, as a lot of music to this day is mastered quite poorly, unfortunately.
Edited by Riku540 - 1/5/11 at 3:36pm