When I went looking for my Livingroom speaker, I realized that coherence in the sound (with driver-based speakers) was amongst the top attributes I should seek. The speakers I was demoing usually had drivers made out of different materials and sometimes that did not sound like one voice. I felt some discontinuity in the bottom range.
My worst audition (because of the room) was the speaker I ended up getting because the 3 drivers sounded like 1 voice. I did near-field listening, almost like headphones to demo the speaker. That speaker was the Yamaha NS5000. The drivers are made out of a material lighter and supposedly faster than the BE material used in the Revel Salon, Paradigm 9H, etc... The coherence part is likely because the tiny tweeter and the 12-inch woofer (plus midrange) are made from this new material, Zylon.
Yamaha spent a lot of time and likely money researching the tech used in this speaker. They built their own drivers, used some exotic wood from Japan, and I think made a tremendous speaker. So much so that I threw out my shipping boxes. I will see a box before my NS5000 sees another box.
The NS5000 is the successor to the NS1000 from the 1970's. That speaker was the first to have both a BE tweeter and midrange in the same model. Today Paradigm touts that as a big breakthrough in their top end Persona line. Yamaha seems to have some serious audio research chops going back a while.
The dealer that I went to audition the Yamaha had it stuck in the worst possible room. They had the Sonus Faber in the best room. I could tell that the Yamaha did not have the prestige of the Sonus. I had no interest in listening to the Sonus because I found them dark. However, my understanding is that the latest models are not like that. I should have listened.