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The best way to isolate my subs from the floor?

I live in an old home with wood floors that seem to be a little weak. My room vibrates whenever my subs kick in (I have two for loading). They are Von Schweikert SR1's, so these are musical subs, not at all boomy, and they are turned down. It's really an issue of room construction.

Do the products available for other types of speaker isolation work with subs? They are downward firing, so I worry about what I put under them. Can I screw up the sound by putting them on the wrong material.

BTW, on the matter of money, I've spent most of what I had to spend this year, but this can't wait. Cheaper options appreciated. :)

Joy Elyse

p.s. I rent, so nothing permanent and nothing that might damage the house.
joyelyse
beavis
272 posts
 
Check out the Sub Stand at http://www.acousticsciences.com/products.htm A little pricey, butÂ…
gfroman's avatar
gfroman
142 posts
 
I too live in an old house with hardwood floors. I have had great results with my large Dynaudio Temptation speakers sitting on 1" thick granite slabs with 3 Aurios(ball bearing) between the granite slabs and the speakers. Really tightens up the bass and keeps most of that low frequency from transferring into the floor.
Cheers,
Gregg
sean
6,231 posts
 
You might want to try bracing the floor from underneath using some 4 x 4's and / or some hydraulic bottle jacks. You can place the bottle jacks on top of the 4 x 4's to get them up near the floor and then adjust the bottle jacks for the amount of tension you want on the floor. If the floor is poorly suspended and "sagging" all over the place, using another section of wood where the bottle jack and the floor joist meets will help spread the tension out. This will support a larger portion of the floor using fewer jacks, making it a far more useable approach. Then again, this assumes that you can get beneath the floor ( via a basement, etc... ) and that your system is located on the first floor. If you are in an apartment, condo or up on the second floor, this is probably not going to work for practical reasons.

I will only add that altering the distance that the driver is above the surface below it will change the tuning and output characteristics of the sub's. All down-firing drivers are tuned with a given space between them and the support structure beneath them taken into account. As such, be careful with what you use, as it could end up altering performance enough to make you not want to use the subs at all. Sean
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