R/E/P Community
R/E/P => Acoustics in Motion => Topic started by: DanDan on June 18, 2011, 09:19:32 AM
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I would like to get a ball hopping here....
In general I have a speaker on a stand in mind, furthermore one might want to decouple the stand from the floor. So any decoupling situation will do but I used the title Sorbo deliberately to steer away from springs and such.
How do the various viscoelastic products compare?
Sorbothane, Neoprene, EPDM? etc.
What is the performance figure? Durometer?
What is the optimum % compression.
Is there an advantage in a cone or hemisphere?
Does anyone have links to the manufacturers tech data?
Links to sources of supply, worldwide?
DD
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Sorbothane and other neoprene products work amazingly well but MUST be used by applying the appropriate math otherwise you're wasting your money. We use Sorbothane and products from Mason Industries for various de-coupling. Simple searches will get you to these manufacturer's websites and they all have extensive product support to figure out what specific products, durometers and quantities you need---if you don't want to use their literature and calculate yourself their product support people will help you; just call (or hire me!). Don't fool around and use something generic.
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Sorbothane and other neoprene products work amazingly well but MUST be used by applying the appropriate math otherwise you're wasting your money. ................
I agree absolutely.
couple of hints:
- Resonant frequency of complete system (loudspeaker + stand + neoprene) must be well below working frequency (of loudspeaker)...
- Loudspeakers have mostly forward/backward LF vibrations... not upward/downward (or left/right)...
Links?
Here are useful one (IMHO) http://www.vibrationmounts.com/Products1.htm (http://www.vibrationmounts.com/Products1.htm)
Best regards,
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Another link:
http://www.mecanocaucho.com/en/productos.php
We work with these guys for all anti-vibration mounts etc.
You can ask them custom systems - they will design it for you or you can calculate yourself and they will just build it to specs.
PS: if needed I can briefly explain how the maths behind decoupling work.
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one more:
http://www.sorbothane.com/design-guide.php (http://www.sorbothane.com/design-guide.php)
This is the material we use all the time for decoupling larger speakers. Calculator is easy to use... note, yes loudspeakers have front-back movement, but the static load is presented along the line of the center of gravity which is typically up and down. The pads will be in compression from the static load along the line of the center of gravity. The calculator will help you determine the amount of compression but I typically start out at around 20%....
FM
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one more:
http://www.sorbothane.com/design-guide.php (http://www.sorbothane.com/design-guide.php)
This is the material we use all the time for decoupling larger speakers. Calculator is easy to use... note, yes loudspeakers have front-back movement, but the static load is presented along the line of the center of gravity which is typically up and down. The pads will be in compression from the static load along the line of the center of gravity. The calculator will help you determine the amount of compression but I typically start out at around 20%....
FM
Neat link & calculator Fran! Thanks.
It's just funny to see how depending on where you are in the world, we use more or less the same techniques but the "names" and "brands" are different. How many times have I heard from salesman while ordering specific materials "Oh, our product is much better than what you guys got in (-- insert country name here --)" just to discover it's the exact same thing and sometimes even produced in the same factory.
Like DVD players.
Good times :)
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good times... 8)
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Great answers thank you all.
I'm ok with the math on this one, though ta T.
The calculator is a little reminder for me to get Windows going on my iMac.
I am about to get some Sorbo the Magnificent to go between my ADAM S3A's and Towersonic stands.
An EU source?
DD
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When needed, I buy custom built (from my specifications) mounts from my local manufacturer (not sorbothane)