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Does it have to be foam, what about a cardboard box?
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The driver smiled when he lost the car in pursuit
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I've tried may different configurations, but so far the most satisfying has been Blue Tac between speaker and stand, and Stillpoints between stand and floor.
Spikes = bad, Isolation = good
Three most important things in Audio reproduction: Keep the noise levels low, the power high and the room diffuse.
Like Depends? Why?
Lookin at pads?
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The driver smiled when he lost the car in pursuit
I sometimes use 1/8" thick sheet sorbothane, cut into squares of various sizes. Like Blu Tack, it is sticky. Unlike Blu Tack, it can be layered to provide just the right degree of isolation for my loudspeakers.
"He was one of those men who live in poverty so that their lines of questioning may continue." - John Steinbeck
Edits: 06/21/12
Mali, The Stands are BBC 28", and I did use the spikes as per manufacturer reccomendation. Here is a description of the stands.
For Sale: One new pair of BBC SS-28 28" Professional Anti Feed Back satin black vibration isolator speaker stands. The BBC Professional speaker stands are designed by British engineers, manufactured of MDF and highly compressed material and filled with C.O.II Silicon in order to obtain anti feed back. Supplied with gold color adjustable locking floor spikes and rubber caps for the top plate speaker interface. Top plate: 9" X 6", bottom plate: 12" X 10". Shipped with the top and bottom plates off, all necessary hardware is included.
"Grow older not up !!!"
Jimmy Buffett
I have Vandersteen 5A speakers which come with spikes/cones under the cabinets. The speakers stand on French travertine tile and to protect the tile, I have small brass cups that have a dimple into which the spikes rest. Even though the speakers are over 100 lbs each, they were hopping up and down making a buzzing kind of sound that took me a long time to locate. I put some electrical tape under each of the protectors (between the floor and the protector), and the buzing went away. I would still recommend spikes if the floor is sturdy.
Yes, I use silicone gell pads under my speakers, totally decoupling them from the floor. It made a marked improvement in clarity at all frequencies, and enlarged and clarified the sound-stage. If you give my speakers a gentle push, they will wobble for a moment before they settle down.
Edits: 06/21/12 06/21/12
I wonder what would happen if you put the pads under the rest of your system and hard coupled the speakers to the floor. This assumes, of course, a solid, non-resonant floor.
My set up is in the basement on concrete, no vibrations are being transmitted through the floor. I imagine that this de-coupeling prevents resonances from being reflected back into the speaker off the floor, and just allows them to dissipate naturally from the cabinet.
Edits: 06/21/12
I hope you have a carpet on that floor. Concrete rings and reflects like hell.
Edits: 06/21/12
Yes, I have a heavy wool berber carpet covering most of the floor. The room is actually pretty dead, with shelving lining both side walls.
I am often appalled at seeing set ups with speakers sitting on hardwood floors with no carpeting in sight, sometimes with a small rug in front, windows behind with bare walls and no curtains. Those guys must like bright, reflecting sound or they don't know any better.
My speakers sit on on a thick carpet with concrete underneath. At one time I had carpet penetrating spikes coupling the speakers to the concrete. Bad idea, but I figured it out pretty quickly and lost the spikes.
I'm using Herbie's Big Fat Dots between speakers and stands. The stands are spiked through Berber carpet to the concrete slab floor. The Fat Dots work great at decoupling and are made by Herbie's with some kind of secret compound recipe. I had previously used them as decouplers between Omega Compact Hemps and matching Deep Hemp Subs with great effect.Chris
"Grow older not up !!!"
Jimmy Buffett
Edits: 06/21/12
Under my previous speakers on my hardwood floor. Steve recommended using using Permatex Gasket Adhesive (blue) to affix to the bottom of he speaker. My speakers were towers and to adjust toe-in having them not move was important. I turned the speakers upside down, used just a dab, placed the Dots where I wanted them (2 in front, 1 in back center), put heavy books on them until dry and then good to go.
"Apparently, people now believe that mental telepathy is the foundation of communication and magic is the source of daily events. Consequently, we no longer have to participate in our own lives."
Yes, I use Herbies dots under my equipment. Good stuff. I don't think there's any reason for you to use spikes through your carpet to the concrete unless you need to do that to stabilize the stands.
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