Depends on the implementation and the tweeter - I have heard some dreadful beryllium tweeters that are so metallic sounding I want to take an ice pick to my ears. These will remain unnamed.
Other sound spectacular. Tons of detail and wonderful imaging. I like Magicos sound a lot and think they have one of the best Beryllium implementations.
Incidentally, you could write the same post about AMTs today which are suddenly hot and could have written it in the past about diamond tweeters, silk domes, other metal domes, etc...
There is good and bad. I opted against beryllium partially because I did find the ones I tried a little metallic sounding but I also like to do something a little different and am super happy with the ceramic magnesiums I have in my speakers.
Other sound spectacular. Tons of detail and wonderful imaging. I like Magicos sound a lot and think they have one of the best Beryllium implementations.
Incidentally, you could write the same post about AMTs today which are suddenly hot and could have written it in the past about diamond tweeters, silk domes, other metal domes, etc...
There is good and bad. I opted against beryllium partially because I did find the ones I tried a little metallic sounding but I also like to do something a little different and am super happy with the ceramic magnesiums I have in my speakers.