These test results show a resonance that will irritate some people. I had to leave the room they were in, when I heard them. The one may be right above 20kHz, but is heard by myself, and a young couple (newlywed?) that ordered them without hearing them. This husband and wife couple was trying to find a solution for these speakers they bought, and couldn't listen to. When a metal tweeter does this, some people just can't tolerate it. Link to measurements the couple had.
[http://www.stereophile.com/content/paradigm-reference-studio-60-v5-loudspeaker-measurements] Another model here.[http://www.stereophile.com/content/paradigm-reference-studio20-loudspeaker-measurements]
[http://www.stereophile.com/content/paradigm-reference-studio-60-v5-loudspeaker-measurements] Another model here.[http://www.stereophile.com/content/paradigm-reference-studio20-loudspeaker-measurements]