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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Vibration isolation platform construction....any help out there? posted by slope on December 2, 2004 at 22:04:01:
1) Everything vibrates and nothing is "inert". Tap the MDF and you'll find it has its own resonance, just maybe better for this application than other materials.
2) Any constrained layer experiment setup will start you off right. You don't need to glue it together at first to test out the concepts; you can glue it later (Al Sekela highly recommends Liquid Nails for its absorptive qualities on top of its gluing ability).
3) A lot of the constrained layer designs rely not only on the absorptive quality of each layer, but also on the conversion of vibration into heat energy that results at the interface of each two layers of different materials, so many layers can be a plus, permitting you many variations on the theme.
4) Don't think of just the shelf for your scheme; think of what the shelf rests on too!Here's what I use glued and unglued under CDP and sub: birch ply top, 3/4" MDF, 3 layers of ordinary foamcore, 1/2" MDF, 1/4" hardboard on bottom. These work great and are not expensive and available everywhere.
Here's the other part of the equation: additional isolation AND coupling. I couple my components to the shelves with DIY roller balls. This gives both the coupling AND the rotational isolation properties. Then I float the whole deal above on vertical isolation: for the CDP shelf I use "dead balls" (Norsorex); for the sub on the floor I use sandbags.
All of this works marvelously well sonically and I have lots of other ideas for experimentation. If you look at the Silent Running Audio design, they use some kind of viscoelastic gelpacks in the middle. I suggested to David Aiken that the gelpacks used medically might work and I think he's tried them with success.
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Follow Ups
- Vibration control ideas - bartc 06:41:03 12/03/04 (0)
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