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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: ground glass shelf in hifi rack posted by robertopisa on October 22, 2006 at 05:39:07:
Your bass was likely diminished because the shelf plus CD player have a natural resonance somewhere in the midrange to mid-bass. The sandwich construction (called "constrained layer damping") reduces the natural resonance of the shelf by itself. However, once it is loaded with the weight of a component, the overall system resonance goes down in frequency and the damping layer may not be able to help.Using ground glass will make the shelf less reflective to light, but will not affect its reflectivity to sound waves. Sound wave lengths are much, much longer than light waves. The roughness on the ground glass surface will scatter light waves, but be invisible to sound waves. Any solid shelf will reflect sound.
A very good shelf material is laminated medium-density fiberboard (mdf), made up of several layers to achieve a total thickness of about 1.5 inches (3.75 cm). Your rack may not be able to accommodate a shelf this thick, though.
I use rails to support my equipment on my Lovan racks, and do not use shelves at all. The rails are aluminum extrusion U-channel, 2 inches by 1 inch, and my supports are home made roller ball suspensions made to fit precisely in the channel. Everything is damped against acoustic vibration.
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Follow Ups
- Shelves are trouble. - Al Sekela 14:39:51 10/22/06 (3)
- Re: Shelves are trouble. - robertopisa 15:20:12 10/22/06 (2)
- Looks good! - Al Sekela 15:44:44 10/23/06 (0)
- Interesting design - bartc 06:22:55 10/23/06 (0)
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