I second Bob's point. For electronics, including cdp's, try cones under the component and isolation under the cones. The cones will "drain" vibration from the transformers or moving parts in the components and the isolation (vibrapods, pneumatic platforms) prevents vibration from the floor/rack from getting into to compoonent and signal path. With speakers, a rigid coupling to the floor is key. Spikes minimize the contact between the enclosure and the floor, reducing floor-borne vibration, and they prevent rocking or wobbling that can cause time smear from speakers sitting in the floor or on a compliant surface like sorbothane.
