Also, how would bass emphasis not effect treble at all? (it's entirely unfair to compare open headphones with closed customs by the way, since open headphones have a much larger sound stage, and it's even more absurd (dare i say, absolutely one hundred percent absurd to compare speakers with headphones...?) also, if bass does not effect how we perceive treble, how come a "bass hump" is unwelcome because it effects the details (IE: treble) in fact, when I purchased my quads, I called 1964 ears asking for the difference between the quads and triples and vitaly told me the triples and quads are just as extended as each other, but because of more bass from the quads, the treble can/will be perceived as diminished. finally, monster coppers/higher end bass heavy phones also "suffer" because they are bass heavy, as a result of the bass emphasis, treble perception by the human ear is diminished except it is not enough for some to be of concern. also, please do not torture my words to fit your own views. never did i say more drivers would be needed in order to better flush out the treble (this is a issue with tuning and not with the number of drivers) Finally, any increase in bass can and does decrease a person's perception of detail (treble) whether it is discernible or not is dependent on a persons own hearing and whether they can tolerate the difference (and how much of a difference before it becomes a flaw or bothersome)