Well OK, if you are comparing the Klipsch cabinet quality with new Polks, Bose, KLH then yes they have good cabinet construction. If you compare them to B&W, NHT, Dynaudio ect..then they are built rather poorly.
As a matter of fact, no, I was not comparing the Klipsch cabinets to any of those speakers you mention. I did not comment on the cabinet 'quality' at all, except to say that they could benefit from some additional internal bracing. I also questioned how a wood cabinet could 'ring like a bell', as you suggested. More importantly, regarding the Klipsch speakers, what I said was that the horns that are being used in the Klipsch Heritage line do not depend at all upon the cabinets for any aspect of how they perform (other than being held in position). The midhorn and tweeter would sound the same whether or not they were held inside a cabinet, or supported firmly in space by a simple stand. The folded horn and bass drivers are the only aspect of the performance of those speakers that would be effected by cabinet 'quality'. If you are referring to visual and aesthetic 'quality' I agree with you completely: there are many other speakers that are built and finished better and are more pleasing to most folks in comparison to the rather utilitarian (deliberately so) look of the Klipsch Heritage speakers. As far as how they sound, it's largely a matter of synergy and personal tastes. The bass response could be improved upon by better bracing and more solid cabinets. Most of the magic of the horn speakers are in that midrange though.
It does not surprise me one bit that there are those who do not like how they sound, nor does it surprise me that there are just as many who do. I would say the same thing about any speaker or component. You'll always find someone who likes it and someone who doesn't.
The Klipschorn was designed back in 1945
And it is still in production! Continuously....for over 60 years! Why, I wonder? How many other speakers can claim that longevity? I can't think of any others, can you? I can't really think of any electronic product that can make that claim. We've come a long way since then, yet a 60 year-old design can still wow quite a few very serious music lovers. It ain't perfect..plenty to improve upon, but a damn find foundation IMO. If there were one perfect speaker, wouldn't all of us agree and covet the exact same thing?
Marco