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michael green
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Rubber type products

When I had my first audio store I loaded up on accessories without thinking. There was a part of me that figured "it's high end audio stuff, surely it's going to sound great". At that time the rubbery type products were starting to be used so I got a wide selection. Sure enough I heard a difference and talking about them was cool. They started moving through the store pretty good, and my register was ringing. I started using a little, then a little more, then well...maybe a little more. I did a bunch of other tweaks (this was before I was a designer) and the more I got into the rubbery something was catching my ear. I would walk by the room where the system was rubbered out and it was starting to bug me. "what's wrong?" I thought I had spent a fair amount of time focusing things in, but something wasn't right. It wasn't untill I put my audiophile recording in my car and listened on the way home when I realize there was a ton of music my car was playing that the dampened system was not. I turned around, went back and started to remove the dampening from the system. "Holy Smokies", that poor system was choked to death and I didn't notice because I was too busy going down my one way street of dampening.

Now I'm not talking about just those feet (pucks). It started with the feet and the pads, then when I got that all over the place like a madman it went to the weight, pieces of marble stacked on top of components and speakers, rubber lifters for cables wrapped transformers. In fact you know that duct work insallation with the foil and rubber. I got that stuff and even ordered some in custom. I made all kinds of layers out of a bunch of different materials. When I start something I'm possessed. Ask some of my early store clients LOL. I order Rubber bands made from different materials for my tubes. I had dampening all over my stock room and every material known to man to use as layers. I had spring setups and things hanging from the ceiling and all kinds of stuff.

All of that stuff ended up coming out of my systems. Once I figured out the sound and what came up missing I can now hear when even a little piece of rubbery dampening is put in a system. You know those overbuilt drivers with the thick rubber surrounds and thick cones, same sound. Rubber gaskets on speakers? listen closely, same sound. Doesn't matter if it is inbetween other layers or what type of table your setup is sitting on, put it in your system and listen carefully. If you have another system hooked up to reference with, your going to hear it, a rubbery sound and holes in the stage. You might even hear the music gather around the speakers. All kinds of nasties, listen. Listen to it and listen to a system without it.

There are better ways.

michael green
MGA?RoomTune

geoffkait
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Rubber

I concur. Rubber sucks.

Geoff Kait
Machina Dynamica

michael green
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Yes it does

Since I have moved to transfering energy I very rarely use dampening products at all. I'll use burn materials in acoustics in a barricade setup, but in the mechanical and electrical side of things I try to let the oscillation go as long as it can and tune the parts together.

michael green
MGA/RoomTune

geoffkait
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Super Balls

Super balls, the small one inch diameter high bounce balls you can easily find in gumball machines at grocery stores, etc. Have an interesting property that release energy very rapidly unlike say rubber and other soft rubber like materials. For that reason Super Balls make excellent audio feet, I used to plop a Supper Ball on a Snapple bottle cap and three of those little assemblies would support one component. The Snapple bottle caps prevent the component from sliding off the table. It's the lateral motion of these little roller bearing assemblies that provides isolation in the horizontal plane. Another innerestin' material, and you've seen me use this word several times at least, is viscoelastic material. Now, the thing about viscoelastic material is that when it is constrained, I.e., when pressure is applied to the surface area vertical forces (vibrations) are compelled to move only in the horizontal direction where the vibrational forces are converted to heat by shear forces in the viscoelastic material. Although viscoelastic material looks like rubber it does not act like rubber.

Those two things will change the way you look at damping forever. You have my absolute guarantee.

Geoff gee did I really take theoretical physics in school? Kait
Machina Dynamica

wkhanna
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geoffkait wrote:
geoffkait wrote:

.......It's the lateral motion of these little roller bearing assemblies that provides isolation in the horizontal plane.......

Geoff gee did I really take theoretical physics in school? Kait
Machina Dynamica

Barry Diament has some V interesting thoughts & experiance with this approach.

http://www.barrydiamentaudio.com/vibration.htm

Bill - on the Hill
Practicing Curmudgeon & Audio Snob
- just an “ON” switch, Please –

geoffkait
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Diament in the rough

Someone who recognizes the value of horizontal and rotational isolation! Hialeah!

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Geoff Kait
Machina Dynamica

wkhanna
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No wonder!!!.....you have it all wrong....
geoffkait wrote:

I concur. Rubber sucks.

Geoff Kait
Machina Dynamica

You are supposed to be using Flubber!

 photo MV5BMTMwOTU0OTg3N15BMl5BanBnXkFtZTcwNTMwNjUyMQ_V1_SY317_CR80214317_AL__zps5ff940fe.jpg

Bill - on the Hill
Practicing Curmudgeon & Audio Snob
- just an “ON” switch, Please –

geoffkait
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That's silly!

Nothing beats Silly Putty.

"Silly Putty is a toy based on silicone polymers which display unusual physical properties. It bounces, but breaks when given a sharp blow and can also flow like a liquid. It contains a viscoelastic liquid silicone, a type of non-Newtonian fluid, which makes it act as a viscous liquid over a long time period but as an elastic solid over a short time period. It was originally created by accident during research into potential rubber substitutes for use by the United States in World War II."

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Nothing sounds like Silly Putty.

Geoff Kait
Machina Dynamica

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