Here's an easy online hearing test, to determine how high up one hears:
http://www.noiseaddicts.com/2009/03/can-you-hear-this-hearing-test/
Decay has apparently kicked in. Now I can only make it to 19 khz, and only barely.
FWIW, I'm not American. My current speakers are British, and my next speakers (shipping in a couple of weeks!) are Canadian. I agree that the Kiis are excellent speakers. My comments here must be seen against the backdrop that they are frequently touted as being speakers without a flaw, etc. If they were selling for half the price, or if they were unviersally regarded as shipwrecks, I would have emphasized what I perceive as their virtues instead.
I agree that the bass is very good for the size, but it doesn't seem perfect. I'm quite sure that one could better their bass by adding several large subwoofers and managing it through DSP and room correction. I really can't see why this should be a controversial opinion to hold. That Martin guy from Dutch & Dutch, for example, essentially said the same thing.