I know most coaxials are not as well-engineered as Genelecs, but the IMD that S&R measured for the 8351a indicates that it is at least entirely possible to design a 3-way such that IMD is completely irrelevant, unless you think 2% at 100hz is audible. Which seems unlikely, though I haven't seen much in the way of studies about what level of IMD *is* audible.
Great contribution Sancus!
Listening to music through speakers (ANY speaker) IS A COMPROMISE. We all agree on that one, right?
Given the above statement plus the provided measurements by Amirm and the generous knowledge shared by other members, I think its time to give it a break with the constant criticism (as mentioned by another member in another post) against KEF and Coaxials, let's call it a truce at least.
Speakers are a compromise and in such a realm, Coaxial-Concentric's are a proven formula for better integration between mid-woofer & tweeter crossover points, great Horizontal and Vertical dispersion patterns, point source quality, time-aligned drivers, etc.
In this particular review, I can't stress out Kef has gone through 12 iterations of UniQ drivers over the spread of several decades (the final number is larger since every generation had different product ranges)
Like in everything else, there are cheap and well-engineered Coaxial-Concentric drivers. Addressing the key players of this technology, you get well beyond a Century of combined experience and research: KEF, TANNOY, GRADIENT, GENELEC, DEVIALET, CABASSE, etc. This is a well-matured technology.
I encourage to address further criticism with measurements and proven data in order to expand our knowledge. When using unproven beliefs or vague theories it's kinda better to address it with a question on the subject instead of a statement on the subject.