Originally Posted by
Ammonite Acoustics
Actually not. There is usually a great deal of vibration passed up through the house walls from passing pedestrians, traffic, as well as from internal sources like washing machines, pumps etc. A record player is a very sensitive vibration measuring device - it would not play records if that was not the case, and it is incredibly susceptible to external vibration. A suspended deck on a wall shelf is inherently fairly immune because it has sprung suspension, so the sensitive bits ought to be well isolated. A solid deck, however massy, is most definitely not immune and some form of isolation placed between the deck and the wall shelf is therefore a good thing.
There’s nothing foo nor fancy about this, just basic physics, and basic mass-spring theory is your saviour.