As to weight of the speakers - they are 90 lbs each. The vibration is not bad - the speaker cabinet does not noticably vibrate. But, at 105 db peaks with my feet on the carpeted wooden floor, sitting 6 feet away, I can feel the base. It seems to me that completely eliminating any transmission along the floor would be ideal. I cannot imagine that this would not occur in even the heaviest of speakers without decoupling. The garage rubber pads sound like just the ticket - I'll check out home depot - the hocky pucks are also an interesting idea.
Speaker shock absorbers
From time to time people have posted different methods for mechanically decoupling their speakers from the floor to reduce vibration. Some of these have involved using a ply system of rubber strips and wood strips, which seems reasonable to me. I have looked for suitable sized sections of rubber or even for large sheets to cut up but have been unsuccessful. To those who have used that method -where did you find the material and what thickness of rubber and wood did you use for each layer - finally how many layers did you end up using?
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Musicnoise, some of what you are feeling is the result of airborne bass soundwaves, not necessarily as a result of the speaker/floor interface. And airborne soundwaves, especially bass ones are tough to deal with unless you have sound absorbers of some sort in the room, the the sound absorbers for bass would have to be huge. FWIW. |
Musicnoise - hockeypucks might be to hard. Vibrapods are constructed of special rubber specially for that purpose. My speakers are also around 90 lbs and very rigid - (a lot of cross boards inside) but floor is not (basement). Originally I had spikes. Idea of the spike is that infinitely small point cannot transfer energy. In practice it does but shifts resonance frequency up. Regular rubber bounces and felt compresses. Rubber and construction of vibrapods create big losses (no energy transfer). Similar rubber is used in pro computers to isolate drive cage from the rest of the computer. The best is to use softer vibrapods and more of them but it costs. |
newbee - I agree with that statement. It appears that you are in sync with the effect that I was trying to control. It had occurred to me that some of what I was feeling was due to the sound wave without interaction with the floor. I do not necessarily want to eliminate that effect. My only goal is to get rid of any transmission that is not airborne so to speak. As to sound traps in the room, I have several in place, the goal of which was to reduce the liveliness of the room which, without the sound traps ends up reinforcing the high frequencies - those have worked well for that purpose. |
I have had great success with "Unhappy Balls". They work in this application to 1) absorb vibration 2) do so while remaining stiff. Halve the large size (1-1/2" Diameter) ones for a secure fit. http://scientificsonline.com/product.asp_Q_pn_E_3039129 |
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