I've burned in two pairs of 100's: the TBSE and standard 100's.
The 100's sound pretty much the same before and after.
The TBSE's however, have taken on a markedly different sound signature. They highs have really received a boost, and border a bit on being shrill. There is a bit of 'sparkle' there if you will, but I don't find it completely pleasant.
It's really surprising that these two headphones would sound so different; I thought they used the same drivers.
I have listened to both with identical setups: macbook, identical volume, identical song. The TBSE's definitely have more high frequency emphasis.
Both are going back since I am having to bend over backwards to burn them in, and to give them the benefit of the doubt in my evaluation of their sound quality.
Edited by newphones - 4/2/13 at 8:33pm