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First damage. B&C DE500

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fatfreddiescat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fatfreddiescat Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2016 at 2:12pm
To me that looks like it could be due to running high amounts of boost in the 8K plus region where the diaphragm is no longer working in piston mode, but is flexing. Often if the diaphragm has hit the bung hard, you can see the marks on the diaphagm
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2016 at 2:31pm
Originally posted by fatfreddiescat fatfreddiescat wrote:

To me that looks like it could be due to running high amounts of boost in the 8K plus region where the diaphragm is no longer working in piston mode, but is flexing. Often if the diaphragm has hit the bung hard, you can see the marks on the diaphagm

That's entirely possible.  More unusual on small compression drivers but seen it happen on large format ones where people have boosted them to try and produce frequencies they just can't do.
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studio45 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote studio45 Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2016 at 3:21pm
After "several" years, I would say you've probably just hit the MTBF (mean time between failures). 
Titanium is nearly magic, but not quite. A certain amount of flexing, and consequent work-hardening of the material, is a normal part of operation - and when the hardness goes past a certain point, poof! Metal confetti. 
If you were shattering them every month, you would be doing something wrong. Once in several years is not really anything to worry about though. Apart from having to buy a new diaphragm at B+C prices of course ;)
Studio45 - Box Builder Commotion Soundsystem -Mobile PA
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ceharden View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ceharden Quote  Post ReplyReply Direct Link To This Post Posted: 10 August 2016 at 3:53pm
B&C prices are a lot more reasonable now Blue Aran have taken over distribution. Proel were completely useless.
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