That ignores all the advantages that these speakers have and hones in on "flaws" that aren't audible or relevant. Sounds like someone is feeling insecure about their audio equipment...
Huh? Why do criticism about a speaker (review) sound like I am insecure about my own audio equipment? I am more then happy with my own equipment.
In my opinion it are serious flaws in the measurements at that pricerange, yes maybe on the on axis location it's not audible since on axis is very good (but far enough of axis it MUST be audible, depends how the placement is and where the seat locations are(with 3-4 couch seats it WILL be audible, and that's regular for movie watching for example)) but since Perlisten and Revel and for example Focal all 3 have Beryllium tweeters and a sort of waveguide, so it's fair to compare them to each other. Perlisten simply measures worse on this area, it's clearly seen on the measurements, if this is not audible for you then it's nice for you of course. But to call it not relevant? Why is that not relevant?
Of course there are many advantages of these speakers but the Perlisten s4b have a fast rollof below 100-120hz, and that is not relevant also? We are talking about 9500 dollar speakers including their stands here, then you should be able to expect something (close to) perfect in all area's. Of course it's not doable because of their size but that brings me to the next subject:
Let's not forget that with the stands together they are comparable in size to good towers/floorstanders and good floorstanders from Revel/Focal and maybe even Kef will blow these speakers away in their same pricerange of 9500 dollar.
So what is the benefit of these speakers at this pricerange if you use them together with stands which make them equal size as towers? Close to zero benefit, in my opinion. To say "that there aren’t really any significant weaknesses" is simply something that I don't agree with for the mentioned reasons.
The s4b's, in my opinion, are only great as rears/sides to a complete surround setup of Perlisten speakers with towers as fronts and good LF extension. But for that area they are overpriced imo.