The T1 indeed changes over time. In more than 3 months I have them, they have sounded much better than when I first put them on.
First thing that changed obviously is it appears that T1 gets much more easier to drive over time. I am only using portable amps to Drive T1 and with M8 in particular. I used to get to normal listen volume on T1 when I set M8 to high gain and volume pot at 3PM position. Now I can get the same level at medium gain and volume pot at 12 o'clock position. This is on balanced cable.
Also noticeable the bass region has become much deeper and fuller. The harsh treble on some occasion has gone or tamed a bit.
Maybe it's just me (brain burn in) but T1 is akin to a wine which goes much better with age. I am planning to acquire other headphones (LCD-X is on my sight) but I doubt I will part with T1.
Got an adapter from the resident genius at Charleston Cable Co. to use T1 with speaker amps. The T1 is now a keeper! (How many headphones bite the dust without proper amplification?)
Would it be possible to post a picture of the adapter cable? I would like to give my T1 a try connected to my speaker amp. Would be greatly appreciated!