A simple way to dampen ringing is to apply a constrained layer damper onto the horizontal support surface/shelf.
The one I found to give excellent audible improvement is from Machina Dynamica: VibraBlock Constrained Layer Damper.
Responding to the mention above where brass compression springs have been used,
The same Machina Dynamica can supply "cryogenically treated high-performance hardened steel compression springs"
cleverly named "Cryo Baby Promethean Mini Isolators."
These may be placed against the rigid flat bottom of a component to support the component which is resting upon a horizontal surface. Whether this horizontal surface is granite or wood may be a matter of what sounds best; I prefer wood.
Next place the VibraBlock constrained layer damper onto your chosen shelf.
I prefer what I hear with this damper placed onto a supporting shelf for a component, rather then placing a damper directly on top of a component.
The one I found to give excellent audible improvement is from Machina Dynamica: VibraBlock Constrained Layer Damper.
Responding to the mention above where brass compression springs have been used,
The same Machina Dynamica can supply "cryogenically treated high-performance hardened steel compression springs"
cleverly named "Cryo Baby Promethean Mini Isolators."
These may be placed against the rigid flat bottom of a component to support the component which is resting upon a horizontal surface. Whether this horizontal surface is granite or wood may be a matter of what sounds best; I prefer wood.
Next place the VibraBlock constrained layer damper onto your chosen shelf.
I prefer what I hear with this damper placed onto a supporting shelf for a component, rather then placing a damper directly on top of a component.