Lou...if your components are vibrating from airborne vibrations (i.e., sound waves from the speaker), then the other tweak you should consider beyond the isolation feet are the damping plates (such as the ones from Harmonic Resolution Systems (
Damping Plate reduces vibrations on audio or video performance). I use their Nimbus isolation under my CD. They make excellent products. The other damping products i am aware of are from Mapleshade Audio (
Brass Weights-Mapleshade). Just a thought.