Danoroo, I recently read some favorable reviews on ceramic drivers, specifically Accuton, that got me thinking.
Sarjan Eban's of 6moons.com on the Albedo Apticas.
Scott Hall's from the Parttimeaudiophile on the predecessor to the Duets, the Symphonia 7R.
Jack Robert's review of the Fritz Accuton 6 over at Dagogo.com.
I've heard ceramic drivers a long time ago and wasn't impressed but then I came across these reviews and also noted that some of the best high end makers use some form of Accuton drivers with great results. This led me to try out the Clearwave Duet 6s and found out that these are not same as the earlier drivers as they can be fast, detailed and very evenly balanced, to my ears.
I'd like to get a better response measurement for in room response because so far, they measure quite flat and present a sound that takes some getting used to.
Gone are the soaring highs but when the recording has it, they can go quite high. It's just not exaggerated. The upper mids to upper bass is what gets me. It has the sense of being fully fleshed out which can seem a bit dark sounding (rich?), but they're still breaking in. Until I get my stands for proper isolation, I can't really make a definitive statement. On good recordings they can sound wonderful.
I'm tempted to say "world class" but fear the tag of "hyperbolic". I say this as I'm taken back by the frequency range of these speakers and the fully fleshed out sound. Tone and timbre are wonderful on cello, guitar, vocals, small jazz ensembles. Long term listening will tell.
OTOH, I can be all wet on this. :-)
All the best,
Nonoise