Brightness is a strange animal. Somehow, bad brightness is a form of distortion that is painful and fatiguing,
while a headphone that has very evident and extended treble that is done well is refreshing and can be the best aspect of the phones,
making them so compelling and addictive it takes over my whole concentration.
This is what I hear with my Stax 009s.
I have heard "bad brightness" with many different dynamic phone/amp combos in the past that I sold because of this problem.
The 009s actually sound like the treble is more extended and present than the "bad brightness" phones, but it is a good thing, not a bad thing.
In fact, I always considered myself brightness-averse, but the 009s changed that, and made me see what a valuable thing clean, clear, natural highs could be,
and that's why I really love my 009s and can listen for hours with zero pain and they draw me in to the music unbelievably. (I just use a humble 007t amp).
I used to have SR007 Mk 1s (with the same amp) and did not find them anywhere near as compelling as the 009s in any way.
Just my 2 cents here.
[edited for grammar only -rgs]
Edited by rgs9200m - 4/25/13 at 9:11am