[carlineng]

Roughly, what is the range of frequencies that you consider to be "bass", "mid" and "treble". For example, when speaking of a headphone's "aggressive treble", do you mean that the response in the 14,000-16,000 hz range is really high? Just wonderin...

 

[PiccoloNamek]

When most people say that a headphone has aggressive treble, they don't actually mean the upper treble frequencies, but rather, the upper midrange, particularly around 6 to 8kHz. Emphasis in this area causes harshness. Emphasis in the real treble (above 10kHz) doesn't sound "harsh" in the same way.