Fascinating thread.

What types of instruments (or sounds) would produce energy in that beyond audibility range? I mean, are we talking about harmonics created by cymbal crashes or what here? Is there a specific example of a type of sound or a type of instrument whose reproduction would be enhanced by the ability of the speaker to produce those signals from 22k-45k Hz?

And are the other links in the typical audio chain either deliberately or theoretically limited in conveying signals at those frequencies? That is, even if I had a super-tweeter, would a system comprised of "typical" audio components benefit, or would you need to upgrade to esoterics to really hear the difference?

Just because a manufacturer (like Axiom, for instance) only *rates* speaker frequency response up to 20k Hz, does that necessarily mean that the extant tweeter is incapable of flat response even higher? Is there a theoretical limit on frequency response based on the design characteristic of a dome tweeter?

Yes, I AM too lazy to do my own research, but y'all started it.

bibere usque ad hilaritatem