Looks like Klipsch do actually know what drivers they are working with and that dip is made for both "in-house sound" and avoiding that sawtooth-like upper midrange. I bet that latter can be worse to many ears as far as we - humans - get "calibrated" to frequency response, even pretty weird, in a few minutes. But not to resonances and distortion.
Anyway I wouldn't buy both for sure, stock or upgraded.
That is what I thought until I borrowed a pair. (Version 1)
With a little PEQ based on the anechoic data they are superb speakers.
I had no issues beyond the narrow directivity which sounds great in the hifi listening position (even for 2 people)but terrible if are you move around the room. Not good for background listening outside of the general sweet spot at all, and I mean at all.
I compared them to the KEF R3 and it was a toss up in terms of which speaker I would "keep". Bear in mind I would not keep either one, but that doesn't mean I did not find both to be an extremely good fit for the right buyer.
I did like the JBL 530 a bit more but not because it was that much better rather because it has a few sound traits that I personally have really grown to love for a budget design. I mention it as many cross shop these due to the recent crazy low sale prices. ($240 530/$300 RP version 1)
I anticipated not liking the RP and perhaps loving the R3 so this was interesting.
Once PEQ is applied to the RP and a HP around 60-80hrz it can also handle extereme SPL if that is desired though it doesn't have as much of the room filling sense of spaciousness that I prefer.
Also with a little edge taken off the treble it is very smooth up top while still sounding detailed and dare I say sophisticated sounding, another trait I would have never anticipated.
These are far better than I anticipated and while I don't care super deeply about the Harman score, with some versions of anechoic PEQ they can reach a very high "score", mid6/mid8 and they can play loudly while doing it.
@amirm
Due to the narrow dispersion this is speaker that I suspect can't perform to its fullest unless in stereo. It relies more on the stereo effect/recorded information to create a sense of space. Who knows if you agree but if it comes around again or another narrow speaker arrives and you feel a wild hair try a test in mono and stereo. That would be a great way to find out if narrow designs are hindered by the mono test.