Advantages of beryllium?


Can someone please explain the advantages of beryllium drivers over titanium or aluminum?

Also, how concerning are health risks associated with beryllium?

many thanks for your input. 
defiantboomerang
I worry that people will accidentally stick their fingers into the tweeters of those precious Magicos…and according to at least one guy who sells them it seems that's not such rare a thing. My fragile aluminum-magnesium tweeters are covered by a mesh screen so have another drink cousin Shirley! Just don't knock the damn speakers over.
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Micro-motor tweeters are just tweeters with the bare minimum motors to work. Focal as well as B&W are proponents of this approach. The motor is no wider than the dome and usually less than half an inch thick.

Despite assertions otherwise, popular micro-motors measure terribly across distortion, frequency and lack of linearity, regardless of material used.

They are routinely outclassed by relatively inexpensive models from popular driver vendors.

Best,

E
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