Hard Audio - Ceramic Speakers

@erik_squires 

Yes, I believe the coating is Aluminum Oxide, which is a ceramic material.  I'm not sure how they apply it, or what the difference is with the new Revel drivers.  

The benefits of paper drivers and soft dome tweeters are that their breakup nodes aren't nearly as nasty as metal drivers.  The downside is that their breakup nodes occur at lower frequencies.  

Still, breakup nodes are only an issue if you're running drivers into the extremes of their range or using shallow slope crossovers.  If you're building a 2-way or 2.5 way speaker with a first order crossover, it's something you need to worry about.  If you're building a 3-way using 4th order crossovers you'll have a lot less to worry about with regard to breakup nodes, unless you just picked the completely wrong drivers for your project.

I've never ever been moved though. For whatever reason, every ceramic speaker I've heard sounded cold, clinical, pure without power. 

Funny we purchased the Auccuton drivers and just plugged them into an old pair on Infinity Kappa speakers and then compared them to my old Vandersteen model 5 speakers.  We felt the Auccuton drivers were faster, had better clarity and were just as musical.  No modifications, just put them in and let them play.  Go figure. 

@shadorne 

Do you think a pure diamond driver would be able to avoid the pitfalls of a ceramic driver? I understand Accuton makes 5.5" diamond domes for the La Assoluta Tidal speakers. 

The great expensive of making a driver like that must be worth it, no?

The great expense may be worth it for marketing purposes alone.  I’ve never heard the speaker, maybe the diamond midrange is something special, but the B&W diamond tweeters don’t sound any better than the beryllium domes or RAAL or Aurum Cantus ribbons, or Legacy AMTs I’ve heard IMO. 

The Marten speakers used to be thst way very neutral a bit too cool, ,but they changed the crossover parts I believe to Mundorf s best Silver Gold oil
That changed their sonic voice to much richer and involving 
The crossover is the Heart of the speaker..