verdantaudio,
You posted "[that the Persona] is universally deemed bright and I found it **and every other paradigm product I have ever heard to be bright.** But, that has been there [sic] house sound since the beginning of time."
I never heard the Personas and express no views. That said, I seem to recall that John Atkinson may have reviewed one of the Persona models and I noted that the top end was shelved up. That could possible explain what you heard.
In any case, I own the Paradigm Signature 8 (v3) BE tweeter speakers. Based on old reviews of its predecessor (S8 v2), I recall that the FR was pretty flat, although its impedance and phase angle curves were pretty wild. On the other hand, I also recall that Audiophile Review.com reviewed a bunch of speakers and to my surprise, the S8s ranked 7 among a host of dozens.
See
https://audiophilereview.com/audiophile/the-25-ultimate-audiophile-speakers-of-all-time.htmlWell, I still own the S8s and I do not find them bright or harsh. I can't speak for other speakers in the Paradigm line, but the S8s with the BE tweeters sound very nice. It could be that my ARC Ref 150SE tube amp tames the harshness, …. who knows. In any case, IMO, your post uses a pretty broad brush to slap a lot of paint on a company's entire speaker line.
Of course, everyone is entitled to their opinion. I have been dying to listen to the Magico S5 Mk IIs, coupled with my amp. Maybe one day I will get that chance. But until that day comes, IMO, I do not think that I am listening to sonic swill.
Respectfully submitted,
BIF