All of their floorstanders that I experienced appeared to have the same cabinet induced colorations, though it seemed worse with the lowest priced point line.
Resonances can be measured and compared to perceptual research to determine the severity of [1]audibility, based on relative level of the resonance amplitude vs. main signal level vs. the bandwidth(Q) of the resonance. Now, my analysis of Klipsche was completely subjective, due to the circumstances. I did outline why I have a high degree of confidence in my particular observation in the prior post.
Yes, all speakers introduce some sort of coloration to some extent. But some do so at such low levels, that it is irrelevant, and barely audible, if at all. Some speakers have cabinets that produce almost no measurable cabinet vibration(s), and can be safely said to not have any cabinet panel radiation coloration(s).
Most people have never experienced very high sound quality sound reproduction system(s), even if they have visited several 'high-end' boutiques and purchased hardware from such places. Because of this, I don't know what relevance it is that a so-called 'high-end' use may pick a Klipsch to go with their 'high-end' amplifier and/or other components.
-Chris
Footnotes
[1] "The Modification of Timbre by Resonances: Perception and Measurement", Floyd Toole, Sean Olive, JAES, Vol. 36, No. 3, 1988, March, pages 122-141