Get some Masonite and cut them big enough to go under your selected components.
Get in your car (take your sweetheart so she can join in the fun too) and go to a toy store or Wal Mart. Buy some bicycle inner tubes, the small ones, like 6 to 12 inches or so across.
Take them home and blow them up about half way, place one under the Masonite and place the selected component on top of that.
Sit down for a listen! What do you hear? I bet it sounds much better!