Can foam padding isolate better than spikes?

"This may be quite crazy but I've set my Dynaudio C3 speaker stands down on a 1.5" thick sheet of soft foam padding instead of using spikes. Now the floor has almost no vibration. The sound is cleaner and more natural. I did the same with my subwoofer with the same results! Now I'm considering laying all of my gear on soft foam. Has anyone tried this? Any comments would be greatly appreciated."

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