Home made equipment isolation platforms.......?

Knightshade said:
It's a softwood which, in thick enough chunks, works in a similar way to cork. Soaks up low level frequencies nicely. The down side is it's easily damaged and well, it's pine.
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Hiya,
These thick chunks, are we talking iso feet still, or platforms and room treatment stuff? and might we be talking chunks of 2"x2", or bigger....just a rough idea :)

I have a reasonable amount of 4"x2" in the shed:D
However, I feel my bass is tight enough, but then again can't knock it untill I've tried it ;)
 
if it was me....

Deaf Cat said:
Hiya,
These thick chunks, are we talking iso feet still,
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Some thing makes me doubt it.......but its worth a shot!


Deaf Cat said:
or platforms
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Yes, i''m trying a sandwich of granite/mdf........which is now goig to get a lump of pine in the middle :D


Deaf Cat said:
and room treatment stuff?
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wouldn't have thought so (but I stand to be corrected!)


Deaf Cat said:
and might we be talking chunks of 2"x2", or bigger....just a rough idea :)
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Bigger hte better in my experience! ;)


Deaf Cat said:
I have a reasonable amount of 4"x2" in the shed:D
However, I feel my bass is tight enough, but then again can't knock it untill I've tried it ;)
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Give it a go.....

...if you feel you've lost soemthing you can always reverse it!
 
Thick slabs 2" +, about the size of the speaker footprint if possible.
DC forgive me for asking but what are you trying to achieve?
 
Knightshade said:
Hi JCL,
If you take a look at some really expensive guitars and look at what materials are used you can get some idea of the variation in properties between different woods.
Completely off topic I know but take a traditional Long Bow made from Yew, 2 different parts of the same tree and 2 radically different properties.
At one end of the scale you have soft woods like Pine, then things like Cork, all the way through to Lignum Vitae and Ebony.

A great variation to choose from.

Still I must say most choices are governed by looks and fashion, hence why pine isn't often used (although it's perfect for Hi Fi)
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Well yes I completely agree with you regarding wood for musical instruments etc but there you're dealing with real resonances. Not the micro frequencies that a transformer or a CD transport resonates at. I'm not sure any static wood or metal is compliant enough to absorb those.
 
The only thing softwood will soak up nicely is moisture in the air with decreasing relative humidity. Real woods (as opposed to particle or laminate) are wonderfully coloured in their acoustic signatures, the reason woods like spruce, mahogany and cedar are used to make quality acoustic instruments.

Materials like rubber or mass-loaded bitumen are best used for structural decoupling. There are plenty of examples. Wood does look a whole lot better tho'.
 
Cork, yes - an acoustic instrument made from cork wouldn't have much in the way of tone. Although it's actually the bark of a tree.
 
David..ive moved your cones from my cdp to my 2 x monoblock power amps and the difference is staggering.....please delete some of the messages from your pm folder as i cant email you as its full!!!!!!!!!!! If any ZG - ers have a glass rack, the ball bearing coned feet make a massive difference...i really am astounded by the difference they have made when i moved them to my power amps....David, send me your address for cheque thanks banpe
 
banpe2006 said:
David..ive moved your cones from my cdp to my 2 x monoblock power amps and the difference is staggering.....please delete some of the messages from your pm folder as i cant email you as its full!!!!!!!!!!! If any ZG - ers have a glass rack, the ball bearing coned feet make a massive difference...i really am astounded by the difference they have made when i moved them to my power amps....David, send me your address for cheque thanks banpe
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Whoops...

Sorry, just dumped some e mails

(does any body know of an effiecent way of storing valuable messages...the way i'm doing it now...one at a time is far too slow)

YOu have a pm banpe....

Thanks very much for your feed back :) :)
 
mosfet said:
Cork, yes - an acoustic instrument made from cork wouldn't have much in the way of tone. Although it's actually the bark of a tree.
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But we're not on the subject of musical instruments we're talking about hi fi and vibration absorbtion. And yes it's an Oak tree.
 
I see I can get balsa from a local supplier, Mark.

I think some people have tried this.......have you?



banpe2006 said:
please delete some of the messages from your pm folder as i cant email you as its full!!!!!!!!!!!
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Just dumped the whole b****y lot!! :D


I have saved them on to the hard drive...twice.

I still KNOW i'm going to regret doing that though! :rolleyes:





.
 
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Knightshade said:
But we're not on the subject of musical instruments we're talking about hi fi and vibration absorbtion. And yes it's an Oak tree.
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The two are related. I thought you had figured that out?

Tonewoods are not suited for building any sort of isolation platform for the very reason they are suited for building acoustic instruments. These tonewoods include softwoods like spruce, cedar, pine etc - these woods do not soak up frequencies nicely. If they did the instruments would lack tone, sustain, projection and volume.

Cork, on the other hand, has lossy properties comparable to rubber and so is suited to building an isolation platform. Rubbish for guitars tho'.
 
maybe of interest

http://www.grindbeckindia.com/avm.htm


http://www.anchorcork.com/anti-vibration.htm


http://flooringalternatives.com/cork/corkstory.html


balsa also seems to have vib abs qualites but is poss not renewable like cork

edit; yes it is!


http://www.answers.com/topic/balsa


"as it is low density but high in strength. Balsa wood is used to make very light, stiff structures in model bridge tests and for the construction of light wooden aeroplanes, most famously the World War II de Havilland Mosquito"


http://www.4to40.com/encyclopedia/index.asp?id=108


intersting chart at bottom of this

http://www.skyhooks.ca/balsa.htm
 
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mosfet said:
The two are related. I thought you had figured that out?

Tonewoods are not suited for building any sort of isolation platform for the very reason they are suited for building acoustic instruments. These tonewoods include softwoods like spruce, cedar, pine etc - these woods do not soak up frequencies nicely. If they did the instruments would lack tone, sustain, projection and volume.

Cork, on the other hand, has lossy properties comparable to rubber and so is suited to building an isolation platform. Rubbish for guitars tho'.
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I'm sorry but I beg to differ, in thick enough pieces Pine is a reasonable vibration absorber not on the same level as cork but not many people would go for something made from cork. I have tried it and can demonstrate it to you if you wish. A musical instrument creates tone, volume etc as much from the shape as the material.
 
Purely for absorbtion? Cork Oak. But it's not practical to make anything purely from cork, even in the natural form its easily damaged.
 
Knightshade said:
Purely for absorbtion? Cork Oak. But it's not practical to make anything purely from cork, even in the natural form its easily damaged.
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Mark, Im just curous....

I was trying to track down some cork ysterday.....with minimal success. My local builders merchant was able to supply with stuff called "joint filler".

Have you come across this?

Apparantly its used between sections of concrete to absorb expansion/contraction.

It looks a bit like cork, squashy....and not bad ££.

Seems to have worked quite well under my cd player.
 

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