Chinese Beryllium diaphragms

[edgewound]

The supplier of JBL's Be diaphragms, Brush-Wellman, did an analysis of allegedly beryllium cones and domes that were sourced from China.

What do you think they discovered?

Go to the first link in the link below, and read the report.

http://www.berylliumproducts.com/Acoustics.aspx

[johnaec]

Similar links at: www.electrofusionproducts.com (Look under "Acoustics".)

John

[Zilch]

The supplier of JBL's Be diaphragms, Brush-Wellman, did an analysis of allegedly beryllium cones and domes that were sourced from China.

javascript:openNewWindow('documents/China_Be_Domes_Report.pdf')

What do you think they discovered?

They are fake?

Made from Mao's melted-down cooking pots?

[Earl K]

Thanks Edge for that tiny look-see into fake Beryllium domes .

I also appreciate the link to a bonafide US based hitech company that does make SOTA "Be" domes. Very Interesting stuff . Maybe within a decade I'll be able to afford to retrofit Be diaphragms into all my SR stuff .

[Zilch]

And those guys wore such good-lookin' suits, too....

[johnaec]

This posting at PwoSoundWeb quoting a JBL rep. says the JBL diaphragms are really titanium with just a beryllium coating - curiouser and curiouser... http://srforums.prosoundweb.com/inde...70/#msg_206609

John

[scott fitlin]

Wow, so theres really no pure Be diaphragms out there, except maybe for TAD?

Whats the story on the TAD phragms, or are they also composite materials?