Which Tweeter preferred- dome natural material, Beryllium/Metal or Planar Ribbon? Why?

It really depends upon the execution of the design and integration in the speaker as a whole.

Almost all types of high-frequency transducers have their uses. It's a big mistake to isolate and focus on parts when loudspeakers are designed as a whole.

Done right I love them all.Depends on the design of the speaker and the other drivers.

What Eric said. In the 90's I was convinced metal domes were harsh and soft domes were smooth while amt's squaked off axis. I can no longer guess correctly what type of tweeter is playing just by listening to it.

@mofojo I’m sure i can’t give you a top 3 of each, but from what I’ve heard:

Top AMT: Beyma and Mundorf

Top Ring: Scanspeak. Even their relatively inexpensive Discovery R2604 is a stellar performer, and has made it into a number of megabuck speakers, Krell, Magico, YG and Sonus Faber (if memory serves) and some incarnation makes it into modern Polk speakers, and for good reason. Even the cheap units have very low distortion and stunning frequency response that flies by 20 kHz.

Top BE: Scanspeak Illuminator D3004, basis of Magico’s tweets.

I’ve not heard Satori’s Be tweets so I can’t really comment on it. I have heard another brand... Transducer labs? And was really not taken by it. TL has a big following including by at least one speaker maker I respect but I just don’t dig it.

I’m not a fan of the Focal inverted dome’s for lack of natural air. To me a good tweeter absolutely vanishes. The Focal’s make their presence known.

I do want to say again though, that we pay far too much attention to tweeters given what a small part of the energy of a speaker they actually reproduce.  Many listeners can't even tell if a tweeter stops working. The price is often out of proportion with their value, and yet, yes, I spent 2x as much on my tweeters as my mid-woofers.  😂