The Absolute Sound ran a review using Vibrapods under speakers with excellent results(Von Schweikerts).Also www.soundstage.com had similar reviews. I haven't tried them under speakers but they seem to offer some benefit under other components.
Alternatives to speaker spikes?
I have a pair of Paradigm Reference 100's with spikes at the bottom. I'm moving into a newly built apartment with beautiful hardwood floors. What can I do to prevent ruining the floor?