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Beryllium Tweets

who is buying into the ~~hype~~?
 I mean new is not always better. I think this Beryllium  is all hype. ~~ IF indeed  this tweet was superior to past proven and tried legends,,why are there not videos on Youtube with the ~~goods~~ the proof is in the listening So  far there are no  uploads with a  compare to old Legends. 
I am staying with my Millenium. 
I've read somewhere the Be tweet sounds rather plastic-ity on top end. 
btw we should mention the Be tweet is actually a  mid-tweet which is the best design for a  2 way. 
If someone can make a series of vids comparing the new kidontheblock Beryllium, I ain;t buying in and have this gut feeling its all hyped. 
skaneoil buster here. 
mozartfan
erik_squires
16,128 posts
 
This would have been a great post in 1990. 

Best,

Erik
zipost's avatar
zipost
197 posts
 
mozartfan.... i disagree with you on your assessment!  If you are talking about vapor BE then it’s not musical but pure clad BE it is in a different league.  I was always a soft dome guy until i own a matched pair of BE drivers, i was blown away how BE was so good.  I have to say it’s very captivating, mesmerizing and lively! 
Post removed 
kijanki's avatar
kijanki
4,428 posts
 
Steve Mowry says in the article "The Whole Truth About Beryllium Diaphragms: -

"For a given geometry the first bending (break-up) frequency is proportional to the material Speed Of Sound, where the speed of sound within a material is defined as the square root of the Young's Modulus divided by the Mass Density, (m/s); the higher the better. However, the Mass of the diaphragm must also be considered. Then the ratio of the Speed Of Sound to the Mass Density can be used as the materials acoustic figure of merit, (m4/kg/s); the higher the better."

After that he shows values of "Acoustic Figure of Merit" for different material (higher the better)in m4/kg/s

Beryllium - 6.97
Diamond - 4.92
Aluminum - 1.86
Titanium - 1.13
Steel - 0.63
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