I received my T1s yesterday. I bought them used from Amazon. The serial # is 3545. First impressions are that these are quite bright, and that is compared to my K702s!
I am listening to these through my Matrix M-stage which is connected to my Auzentech X-fi sound card. I am listening to mostly FLACs and MP3s(360kbps) through Foobar2000.
Now I am not saying the T1s are sibilant, but some songs can be a little fatiguing. The highs are definitely extended beyond what my K702s can do.
I am thinking the issue may be my amp. I am running the T1s through my M-stage with the gain set to 10. I have yet to test a higher gain setting to see if that makes a difference in the sound. I am now thinking of picking up a Bottlehead Crack+Speedball to see what that will do with the sound.
Even with my initial impressions on the highs, I can tell that the T1s are something special. The way they present the music just feels so much more natural than my K702s. The bass is not overwhelming at all, but it is there when the song calls for it. The soundstage is much more life-like to me compared to my K702s. It feels more 3-dimensional, sounds come from all directions.
Seeing as how these are used, I have no idea how many hours they have on them. So, maybe with some burn-in the highs will smooth out a bit.