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Diamond drivers

Out of curiosity I was wondering why diamond speaker units seem to be on the rise. Brands like Marten Design and B&W and many more are selling speakers with diamon tweeters. So what does make a diamond tweeter so good? Or is it just marketing hype. Although I doubt Janzen en Accuton are just making diamond tweeters for marketing reasons.

Yesterday evening I spend two and a half hours listening to the new Raidho D-1 speakers, they use a ribbon tweeter and a diamond mid/bass unit. I have to say this is the best monitor speaker I have ever heard. It is also a 17.000euro monitor speaker so for that price it better be very good.
mordante
elizabeth
6,726 posts
 
Well diamond is very stiff and can be super thin, and stiff and light is perfect for a diaphram.
So yeah it is real sscience.
And still it can be turned into marketing hype.
I have a pair of Sony earbuds with diamond diaphrams from when the tech first came out. Still use them with my laptop.
kijanki's avatar
kijanki
3,575 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

Berillum - 6.97
Diamond - 4.92
Aluminum - 1.86
Titanium - 1.13
Steel - 0.63
bo1972's avatar
bo1972
2,626 posts
 
I can give you an example. The 800 diamond series compared to the Monitor Audio Platinum series. The Monitor Audio with there ribbon tweeter let you hear more information than the diamond tweeter of B&W. It makes depth even more easy to get. At the end it is about the quality and resolution you can hear! There is a big difference in filters they use and make.
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