Tweakers' Asylum

• I'm using clones.... - pburant 05:06:36 08/06/03 (2)
  In Reply to: Anyone using Symposium Ultra shelves with their speakers? posted by Quint on August 01, 2003 at 19:40:28:

  I constructed my own Symposium clones and use them under my speakers and subwoofer. I also have roller bearings between the speakers and platforms. When I first implemented the roller bearings under the speakers, they were placed on pieces of MDF. When I replaced the MDF with my Symposium clones, I heard a very worthwhile improvement.

  -Pete
  
  

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  • Re: I'm using clones.... - Quint 10:05:29 08/06/03 (1)
    In Reply to: I'm using clones.... posted by pburant on August 06, 2003 at 05:06:36:

    By any chance, are you are on a suspended wood floor? As I understand it, that's where speaker isolation works best. My stereo is going on carpet over concrete, and, if I recall correctly, conventional wisdom recommends coupling the speakers to the floor in that instance.
    
    

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    • Yes.. - pburant 10:49:23 08/06/03 (0)
      In Reply to: Re: I'm using clones.... posted by Quint on August 06, 2003 at 10:05:29:

      I am on a suspended wood floor, however.......

      What problemm are you trying to solve by setting up your speakers differently?

      When I isolated my speakers, I didn't do it to reduce the ambient noise that came from the floor itself. I did it to help break the mechanical feedback loop between the speakers and the electronics. While concrete offers a kinder feedback loop from speaker to source (concrete deosn't suffer from the wild amplitude changes that a suspended wood floor will exhibit), the loop is still there along with sonic gains to be had by breaking that loop.

      So, yes, a suspended wood floor may benefit from a reduction in acoustic noise when speakers are suspended, but I believe a great deal of the benefit of suspending speakers has to do with the mechanical feedback loop. A large part of the reason I believe this is that when I isolated my speakers, the improvements to the mid and upper frequencies were as great as the improvements in the bass region. Mid and Upper frequency improvements were also as great as any bass improvements when I isolated my sobwoofer - I can't explain this effect other to attribute it to breaking (or at least reducing) the mechanical feedback loop.

      -Pete
      
      

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