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In Reply to: RE: Nearfield Powered Monitors posted by Tony Lauck on May 06, 2015 at 05:43:48
Sounds beautiful, Tony. Are you still using the Focal monitors listed in your profile?
-Bob
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Same Focals. Very nice, but quite a challenge to set up. Nothing you would want to have around pets or kids due to the hazards of Beryllium dust.
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
Whoah! Would you mind elaborating? I'd think that if the Beryllium dust is that hazardous, then Focal could be open to legal liability? I've got some baby Focals myself (Chorus 705 S's) in the computer room, but I can't remember if they have Beryllium in their tweeter fabrication or not. (I think they do, actually.)
Beryllium dust is hazardous if inhaled. This is known, back from the Manhattan Project. My Focals came with protective covering and instructions on what to do if the tweeter dome is cracked or broken.
"The Solo6 Be and Twin6 Be use a tweeter equipped with a Beryllium dome, allowing a frequency range extending beyond 40kHz. In its solid form, Beryllium is harmless. However, due to its nature, certain special precautions should be observed to avoid exposure to unnecessary risk: Under no circumstances should the Beryllium dome be subjected to any form of abrasive action. To ensure no accidental damage to the tweeter dome it is advised to carefully replace the protection covers while not in use. In the unlikely case of damage to the dome, of any form, a wide piece of adhesive tape should be immediately used to seal the whole front surface of the tweeter. The protective cover should then be replaced and also taped securely in place. You
should then inform the dealer from whom you purchased the product so that the tweeter can be removed by a professional and returned to the product distributor for replacement. If the dome is broken in any way giving rise to loose particles of Beryllium, these should be carefully collected with the use of an adhesive tape and sealed in a zip-top bag to be returned with the tweeter."
Tony Lauck
"Diversity is the law of nature; no two entities in this universe are uniform." - P.R. Sarkar
I did some further checking and my Chorus 705 S's have a magnesium alloy tweeter, not Beryllium as used in Focal's higher end models.
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