Vibration control is a dark art. I've always used what I thought were decent Target equipment stands, solid brass cones and various vibration control devices placed under equipment. We all know them.
Then I started using a Sunoko Vent stand and really was astounded by the improvement. Shared the experience with a shop I occassionally do business with and he laughed. He said they had taken in a used equipment stand and pleyed around with it, he stated "you could have set a polished turd on it and it would have sounded better".
It is a strange thing.