Been wondering about this, so did some research, but was surprised I couldn't find any that categorically says that turntable suspensions really isolate/substantially reduce outside vibrations, resonances, etc.
Many years ago, I had a Linn LP which was so critical I could tell how many people were in the room by what the turntable sounded like. I have a Superscoutmaster Rim Drive now located on the lowest floor of the house with no basement....bedrock. Sounds terrific.
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