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You don't want to use rubber, Sorbothane or Vibrapods in any capacity for speaker isolation; these materials have reverberation and resonance issues that adversely affect linearity, resulting in bloopy bass, loss or accentuation of higher frequencies, and other sonic anomalies. Best regards,RobertHerbie's Audio Lab
Hi, George. Isolating the speaker from the stand is the most essential area to address, and most all of our customers are using either Square Fat Dots or Big Fat Dots between the stand's top plate and speaker with excellent results. Besides improvements in stereo imaging, linearity, and bass definition (among other subtle sonic improvements), many of our customers have found that isolating speakers using dBNeutralizer-based products (such as Square Fat Dots and Big Fat Dots) has significantly reduced the amount of bass vibrations reaching the floor.
Further isolating the stand from the slate block, as well as the slate block from the floor, would be additionally beneficial to further isolate the speakers from the floor. For the stand/slate interface, Cone/Spike Puckies underneath the stand's spikes, in place of the spike shoes, would work very well. Or, you can use the current spike shoes on top of a dBNeutralizer Base Pad: the spike shoe and dBNeutralizer pad would perform similarly to Cone/Spike Puckies to isolate the stands. For isolating the slate block from the floor, Little Fat Gliders would work very well, and would allow for easy repositioning of the speakers when needed.
Sorbothane, to my knowledge, is the most effective (affordable) vibration absorbing material out there, and sorbothane pucks are available so cheaply: http://www.brightstaraudio.com/...that there would not be much risk in experimenting with them.and sorbothane does work brilliantly at absorbing vibration:https://youtu.be/EV4XSYJkjfo?t=162It seems to be important that the proper size and durometer be used for any given weight; ideal absorption of vibration requires a degree of compression. For example, 1" diameter hemispherical feet of 50 durometer come in 4 packs and support weight is 2-4 lb per foot, i.e., 4 feet will support between 8 and 16 lb, ideally.Durometer is a hardness scale; the higher the number, the harder. Sorbothane pucks and hemispheres often come in durometer ratings of 30-50: https://www.smooth-on.com/page/durometer-shore-hardness-scale/Bottom line: sorbothane is cheap and effective at vibration absorption. They have become popular in studios for use under monitor speakers.
Your bias is understandable, but this conflicts with a lot of the experience of recording and mastering engineers who find precisely the opposite with regards 'bloopy bass':https://www.gearslutz.com/board/mastering-forum/920196-inexpensive-speaker-tweak-works.html...and—sorbothane has "reverberation and resonance issues"??
What difference does the shape of the 'dots' make? How many will I need under each speaker? Will they definitely control the distortion/resonance? I presume I can return them if not?Is it necessary to isolate the slate plinths?
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