I have no information about Usher or the people behind their products whatsoever. (don't really care either...)
However, it is a curious bit of serindipity that those products that happen to spend money somewhat "lavishly" (marketing/advertising/large suites at trade shows, etc...) seem to also be the ones that get the biggest best reviews, and that win the "awards" at trade shows. Just my personal observation, nothing scientific about it.
Perhaps my observations are incorrect.
_-_-bear
OH! btw, there is something of an exception in this "alloy" deal! It is the combination of Cu and Zn = brass!!
However, it is a curious bit of serindipity that those products that happen to spend money somewhat "lavishly" (marketing/advertising/large suites at trade shows, etc...) seem to also be the ones that get the biggest best reviews, and that win the "awards" at trade shows. Just my personal observation, nothing scientific about it.
Perhaps my observations are incorrect.
_-_-bear
OH! btw, there is something of an exception in this "alloy" deal! It is the combination of Cu and Zn = brass!!
Member
Joined 2003
Steve, this is in addition to my question above.
Mr. Mowry, the above was posted a while back, yet you have provided no response to this statement from Usher Audio.
You have provided material tests of SONIC's diaphram, can you provide the same data for Brush Wellman's diaphragm, which you claim to be the best diaphragm material in existence today?
Mr. Mowry, the above was posted a while back, yet you have provided no response to this statement from Usher Audio.
You have provided material tests of SONIC's diaphram, can you provide the same data for Brush Wellman's diaphragm, which you claim to be the best diaphragm material in existence today?
The be diaphragm of GOTO, and TAD, have been said by users to be really important
Also that its exstremely expencive diaphragms
Now GOTOs have titan diaphragm
Obviously no big deal
GOTOs are still as expencive as always
TAD still claims a pure BE diaphragm, so obviously not made in Japan
Strange that the moment BE becomes banned in Japan, it begins to become available cheap from other places where they dont care much about the workers
Also that its exstremely expencive diaphragms
Now GOTOs have titan diaphragm
Obviously no big deal
GOTOs are still as expencive as always
TAD still claims a pure BE diaphragm, so obviously not made in Japan
Strange that the moment BE becomes banned in Japan, it begins to become available cheap from other places where they dont care much about the workers
Hello Dcibel
Lots of info on the Brush and Welman Site
http://www.berylliumproducts.com/Acoustics.aspx
Rob🙂
Lots of info on the Brush and Welman Site
http://www.berylliumproducts.com/Acoustics.aspx
Rob🙂
"TAD still claims a pure BE diaphragm, so obviously not made in Japan"
Hello tinitus
That may not be so the Brush Welmans are made using foil. JBL sources their Be diaphrams from them. The Foils need special tooling which is probably only available at Brush Welman.
The TADs use a different process. From the picture it looks like an old sputering machine so it's a vapor deposition process done under a vacuum is a gas plasma. Once you can get a Be source for the machine it can be done anywhere you can set-up the machine.
The TAD's were around years before the foil diaphrams were.
Rob🙂
Hello tinitus
That may not be so the Brush Welmans are made using foil. JBL sources their Be diaphrams from them. The Foils need special tooling which is probably only available at Brush Welman.
The TADs use a different process. From the picture it looks like an old sputering machine so it's a vapor deposition process done under a vacuum is a gas plasma. Once you can get a Be source for the machine it can be done anywhere you can set-up the machine.
The TAD's were around years before the foil diaphrams were.
Rob🙂
Member
Joined 2003
Thank-you for this. I see lab tests of other company's diaphragm, but not of their own. I skimmed the documents, and found some interesting info in the Jan, 2004 issue of Voicecoil Mag:Robh3606 said:
This at least leads me to believe that Brush Wellman can make a vapour deposited pure Be diaphragm, but I would still like to see lab result of their pure Be foil. If Mr. Mowry wants to make statements that Brush Wellman make the best diaphragm material in existence, he should back it up with the lab result to show that it is pure Be. After all, this is "the whole truth about Be diaphragms", right?
I knew i should be careful about saying much, as there seems to be people with greater knowledge, and good for that
Though, I wonder why GOTO have chosen to use titan diaphragm, as it seems they could still get the BE, if they wanted it
Still guessing
Though, I wonder why GOTO have chosen to use titan diaphragm, as it seems they could still get the BE, if they wanted it
Still guessing
DcibeL said:
Within my discussion, I was careful to document my claims.
http://www.s-m-audio.com/truth.zip
Usher had their material tested but never revealed the results.
Usher now claims they found a driver with 14% beryllium but again does not reveal their source, the driver or the report to verify their claims.
For years Usher claimed powder coated titanium was beryllium. Then they claimed their suppler mislead them about that even though the mass of their material was twice beryllium.
Now do you believe Usher's undocumented new claim that they tested a random driver and found 14% beryllium? Perhaps the tester mislead them. Don't they have a famous scientist as a consultant (it's not Dr. Earl)?
Please consider the source of claims and can we be reasonable and realistic here. Could this be the souce of the name "Dancer"?
Member
Joined 2003
I don't believe anything, Mr. mowry. I am only interested in the truth, like the rest of us. As you are here willing to discuss, I ask you to validate the claims of the BW material you praise. As you have had tested other manufacturer's materials, surely you tested the material from BW as well to validate their claim of pure Be, and would be willing to share the results, to show the "whole truth" of Be diaphragm?mowry said:
Again I will ask, do you have any business connection to Brush Wellman?
DcibeL
Jack said, "You have to ask me nicely."
I buy Truextent domes from BW Electrofusion for my STEALLUS Air Core and STEALLUS Hybrid high frequency transducers.
I recommend Truextent domes to my clients, friends, and colleagues.
I also sell Truextent domes along with a few other products listed at http://www.s-m-audio.com/resources.php, and engineering services to clients et al. I am a champion for all the products listed there and I use them, support them, sell them, and believe in them.
I am independent and do not have any other financial interest in any company except S. M. Audio Enginering.
Jack said, "You have to ask me nicely."
I buy Truextent domes from BW Electrofusion for my STEALLUS Air Core and STEALLUS Hybrid high frequency transducers.
I recommend Truextent domes to my clients, friends, and colleagues.
I also sell Truextent domes along with a few other products listed at http://www.s-m-audio.com/resources.php, and engineering services to clients et al. I am a champion for all the products listed there and I use them, support them, sell them, and believe in them.
I am independent and do not have any other financial interest in any company except S. M. Audio Enginering.
Member
Joined 2003
DcibeL said:
DcibeL
Most people call me Steve.
My dad is Mr Mowry. He lives in RI and he is 85 years old. So you better call him Mr. Mowry but please address me as "Steve".
angeloitacare said:
angeloitacare,
Soon.
The transducers (drivers) will be available directly from me in any quantity but first you will see independent testing results published in Voice Coil magazine including KLIPPEL and SoundCheck acquisitions. If you miss the mag, I will have reprints at the s-m-audio.com website.
Latter on there will be active loudspeaker kits with Digmoda (ICE Power modules) and D-PRO Windows DSP software and STEALLUS transducers including basketless woofers (component part mounting will be integrated right into the enclosure design). I call the later "Distributed Boundary Conditions".
DcibeL said:
Between the question and response, I somehow don't see the relationship. I would also be interested in seeing a similar lab result if it is possible to provide it, and certainly hope it all looks promising.mowry said:
Very interesting, this would also mean some form of digital compensation for some of the non-linearity in the driver.mowry said:
Question (For Steve or whomever)
The data sheet from B-W is very interesting, but sadly missing a key quantity. They readily quote the very high "longitudinal" wave velocity, but for a diaphragm this velocity is irrelavent. What is missing is the bending stiffness and most importantly the bending stiffness to density which determines the bending wave speed - the one critical to plate resonances. How does this number compare to the other metals?
The data sheet from B-W is very interesting, but sadly missing a key quantity. They readily quote the very high "longitudinal" wave velocity, but for a diaphragm this velocity is irrelavent. What is missing is the bending stiffness and most importantly the bending stiffness to density which determines the bending wave speed - the one critical to plate resonances. How does this number compare to the other metals?
gedlee said:
Earl,
I use natural frequency FEA to identify the bending frequencies and mode shapes. The geometry and the material properties determine the bending frequencies.
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