@bodhi
Okay.
I don't completely agree about the amplifier, they are not all the same in terms of timbre, generally the Yamaha ones are very "brilliant" as are other brands, while some tend to be more neutral (see Nad) or warm, obviously we are talking about small differences but they are audible on the electronics.
For the cable probably can not affect the sound on this I agree.
Specifically it was Hegel 590 and silver placacto Chord cord.
For the crossover difference, it is evident that it has been modified on the new R3 Meta (the Kef site also says that modifications have been made, better quality capacitors have been installed, etc.) this too made me think of this difference on the mid-highs, for I think the meta update is not going to affect the unbalanced mid-highs in any way, ansi should help in this respect.
I guarantee you that I didn't enter with any prejudice and that the initial minutes of listening were fabulous up to a certain point of the song "Nardis by Patrici Barber" where I felt that annoyance and also on other songs and authors.
The listening room is approximately 5 x 6 meters fully acoustically treated on the walls, floor and ceiling.
The distance between the two speakers is about 3 -3.5 meters another 3 meters at the distance from my listening point with the speakers perfectly oriented towards the center of the sofa where I was sitting.
I haven't tried to move them, probably if you say that off axis they have a sweeter yield on the medium highs it would have been useful to try to change the angle.
Once again I confirm the excellent quality, clean detail and neutrality in the medium-high range.
I found the bass perfectly equal to the old R3s.
In any case I consider them exceptional speakers, I just have to do more tests to remove any doubts.
I too only listen to Clasisca and Jaz music, which is why I am very demanding on the performance and quality of the speakers, which must have characteristics that I like and must not cause any discomfort even after hours of listening.
See you soon.