While not everyone here will agree, I expect that the majority of us has found that placing system components on a good solid equipment rack improves the sound.
I was amazed at the improvement realized when I moved my equipment form a heavy MDF shelved cabinet that I had made to a decent quality Target stand (manufacturer, not store) which I borrowed from a friend. I then bought a PolyCrystal stand that made yet again a large improvement.
At the time I had only solid state components on the stand. The improvement existed even when listening to an FM tuner. Thus, there was an improvement when there was no actively moving parts such as a TT or CDP.
Does anyone know why vibration control makes an improvement in the sound?