Over time, I came to view the Beyerdynamic T1s as the most satisfying headphones we’ve had in the lab to date, at least with the amplifiers we normally use. However, the T1s take a while to appreciate so it is worth understanding this conclusion. Even more important, since my satisfaction isn’t really relevant to you, it is worth understanding what the T1s do well do see if that might be your cup of tea/coffee/wine/water.
My experience is that the frequency response variations of even top-of-the-line headphones are generally significant. These become obvious over time (it takes many recordings to show off the entire range), and form a basic aspect of a headphone’s character.
Overall, the T1s sound very slightly warm, in part because they have ample but not excessive bass output, but also because vocalists seem a little farther back on the stage than they do with many other top-flight headphones. Along with this goes the observation that the T1s do not emphasize treble in a way that would make you call them bright; if anything you hear less low-mid treble energy than on other top headphones. Less low treble contributes to the sense of a somewhat warm sound.