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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: Non-resonant material is best. posted by Ken Lyon on May 24, 2000 at 20:36:55:
No, Ken we didn't stop the internal sections from resonating, because we'd have had to fill them with something denser than air, and that filling would have a resonant mode anyway.But the hollow chambers are closed cells of varying sizes due to the random nature of the aluminium honeycomb we use - and by the way we tried Nomex and cellulose-type cores and they sounded dire - so the resonances are tiny and vary, resulting in a complete unit that has no significant resonant frequency.
I'm glad you noticed the edge decoupling - that was a real headache since we didn't want a platform that showed the honeycomb, but if we bridged the top and bottom carbon fibre sheets with anything apart from the honeycomb, it mucked up the isolation.
Eventually, we mounted a frame on the bottom plate, "floating" clear of the top plate; since the platform is supported on cones stuck to the bottom plate, the edge is purely decorative and sonically irrelevant.
I'm afraid the actual construction of the carbon fibre sheets is a critical factor and something we'd rather keep to ourselves, though of course the total construction is apparent straightaway as you saw.
I think it's the developer's experience in carbon fibre that's allowed us to succeed where others have not; that and the fact he's a hi-fi nut as well as an engineer!
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Follow Ups
- Laminates and resonance - Simon Linton 15:08:26 05/25/00 (1)
- Re: Laminates and resonance - Ken Lyon 23:44:02 05/25/00 (0)
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