still running them in, really like them and they sounded subjectively "complete" despite knowing that objectively it's mid-centric according to measurements found on the now defunct Chang
️ site.
I don't find it bright or thin the way I felt about beyerdynamic T1s (though T1.1 do other technicalities better, such as micro details and headstaging) or grado gs1000e, both of which I listened to for comparison.
In a way, when driven by the chord mojo, it shares with HD650s' flow and just gets out of the way of musical enjoyment.
they are a nice counterpoint to hifiman he400i (or even fostex's own th600s), in the sense that the 400i the midrange serves to connect the bass and treble, and the th500, the bass and treble fleshes out the mids.
ymmv