for the money I find the klipsch rf7iii are well worth the price and may exceed the performance of speakers more expensive.
Most of the time I turn the rear 4 channels off. There is no picture back there, so why have the channels on.

For me the Belles had too much of a hump in the (estimated) 100hz area. The cabinet contributed to this hump. The Cornwall III have this problem too, but less so. I prefer Forte I and second choice would be Forte II. I just cannot tolerate when the cabinet "sings along".
I only heard two sets of K-horns, and they too have a resonance I just do not like. The Heresy III sounds great with a good subwoofer. If Klipsch could only make a Heritage speaker with a very dead cabinet that totally "disappears" much like the best British monitors do, (think many ProAc models), then they would be the best speaker for most applications.
Yes thank you. The question is if it CAN be done, why doesn't Klipsch just do it? Klipsch forums are chock full of people having to modify these speakers to rid them of offending aspects. You would think after all these years Klipsch would build them in such a way to rid the cabinet resonance that obscures detail. The last thing I want to do is spend $12K on a set of speaker only to tear them down and add bracing to them that SHOULD have been done at the factory.Some simple brace work on the mouth of the Belle (and the LaScala) will easily deal with the resonant issues that you are concerned with. See attachment below this will brace the outer cabinet walls as well as the walls of the doghouse.
PS: most people do not notice the colouration so Klipsch did not feel compelled to throw the kitchen sink at the problem as they did not feel it was very serious. As always YMMV as they say.Yes thank you. The question is if it CAN be done, why doesn't Klipsch just do it? Klipsch forums are chock full of people having to modify these speakers to rid them of offending aspects. You would think after all these years Klipsch would build them in such a way to rid the cabinet resonance that obscures detail. The last thing I want to do is spend $12K on a set of speaker only to tear them down and add bracing to them that SHOULD have been done at the factory.[/QUOTE
Klipsch now build the LaScala ll ( for a long time now) with double thick side walls though they ought to double the top and bottom of the large horn as well this pretty much deals with the resonance of the mouth but does not help the doghouse at all. Most are very pleased with the results and the visual esthetic is nicer to most than horizontal braces (I would rather have the braces and the thicker side walls top and bottom, but I don't have room any longer for LaScala I plus I prefer the Peavey FH1). Reason is a combination of visual esthetic and cost. Think what you want Klipsch do their best in a tough market to make a working profit.
If you want to build a horn that performs at another level than the LaScala look at the E.G. Beck California not much larger far better performance. Hope this helps and is of interest.
I fail to understand yur skepticism? the Belle has no braces and is not much different in size as the La Scala. When you have a resonance that you don't want you simply brace it and stiffen the panel, the ideal is to push the resonance up an octave and this will remove it from the bandwidth of the drive that feeds the resonance. Problem solved, this is not complicated.I am still very skeptical because the Belles have the MOST resonance problems of all Klipsch speakers.