From the Sorbothane Wikipedia page,
"Sorbothane exhibits many of the properties of rubber, silicone, and other elastic polymers. It is considered to be a good vibration damping material, an acoustic insulator, and highly durable. An unusually high amount of the energy from an object dropped onto Sorbothane is absorbed. The feel and damping qualities of Sorbothane have been likened to those of meat."
The last sentence caught my eye. Has anyone thought about using meat under components or speakers? One suspects Spam might be the cost benefit champion. Span in a can already has a constrained layer constrained - the can. But there probably isn’t a real substitute for Filet Mignon. Why use a synthetic when you can use the real McCoy? It’s in the meat!