Unfortunately I don't trust these measurements that much as I do the ones for the SR-307 since I didn't use a sealed baffle. Measurements are actually raw. No compensation was used, and this is the case for all the measurements I have so far.
Can't talk much about the treble on this particular cans since I didn't give them as much time as I gave the SR-307. However, notice the depression (similar to the SR-307
) around 2 to 5.5 kHz followed by peaks in the 5.5 to 11 kHz area. My best guess is that such a depression in the high mids combined with peaks in the treble area are responsible for the somewhat bright perception of these cans (and perhaps it's etherealness).
Going by memory, I didn't find these (and the 307) painfully bright as I did the DT-990. Nor did I find them analytical. But there was a sparkle on them.