Are these Speakers the BEST on Planet Earth ?...

@twoleftears wrote: " I’d take these... over the Kii: https://dutchdutch.com/8c/ "

The Dutch & Dutch 8c uses a proper waveguide, which looks to me like it’s based on Earl Geddes’ Oblate Spheroid math, but evolved to meet the specific requirements of a dome tweeter and on-axis listening. (The original Oblate Spheroid measures and sounds best from a little bit off-axis, so it’s not an ideal studio monitor solution.)

The Kii 3 uses a different technology, one which is better than most, and which may do some things better than the Dutch & Dutch. For instance its high frequency dispersion is probably wider, which may be desirable.

Based on experience with the horn technology Kii uses, and with the horn technology that I believe the Dutch & Dutch has evolved from, I agree with twoleftears. But I think the Kii is still an absolutely brilliant design.

Duke

Nothing is the best.  Higher cost does not make it better.  Is a $70,000,000 Ferrari GTO a better car than a 2020 Corvette?  BTW, I am a real Ferrari fan, but they are far from perfect.  Go spend a fortune to impress your friends, but don't be surprised if they do things other than praise your almighty system, and mostly do things with anyone but you.  Put your speaker wires on  little trestles to avoid whatever gremlins live under your floors, without even considering that the closeness of the two wires to each other is much more severe in affecting whatever you are afraid of.  We do not live in a best-or-not-the-best dichotomous world.   You are free to nerd out as much as you wish, but you could have been learning about interesting things like astrophysics, philosophy, and ... Whoops, Gotta go get a life.

I’ll take the Rockport Hyperion speakers 500 lbs each, you dudes and dudettes can fight over the rest. 

Haven't heard them so obviously have no opinion.

But having used the shareware MathAudtioRoomEQ plugin I can say that digital room correction is possibly the single biggest breakthrough in sound quality since the LP, unless you're able to build a dedicated listening room.

And the concern with directivity is also very promising.  I sure WANT to hear these....

I think in the short term there is a huge subjective component in our appreciation for audio gear. In my experience, the speakers which give lasting satisfaction are those which offer lowest distortion, flattest, most extended response, within ones means. My frustration with this site is that most people seem to discount the degree to which the designers experience and research matter. This is far more apparent in DACs, where some hobbyist can sell his creation at prices approaching those of the masters.