Vibration isolation is a topic that the hi-fi industry has, in large part, made a pig's breakfast of down the years. There are obvious circumstances in which it should be a good idea, most notably to prevent loudspeaker vibrations from being transmitted to the floor, particularly if that floor is a suspended wooden one that's prone to resonance. Yet in these circumstances we are typically advised to do the opposite: not isolate the speakers from the floor but couple them as rigidly as possible to it via spikes.
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