On my hardwood floors I tried most of the suggestions listed here. What I found worked best for me and my floor was to use the small clear soft plastic (Home Depot or Lowe's) furniture floor protectors. Along with the sand in the bottom, they don't move either from speaker play or family walking (kids running/jumping) nearby.
Spikes versus Rubber on wood floor?
I am awaiting a pair of new babies, the Von Schweikert VR4SR speakers. They will be positioned on a wood floor over trusses. Anyone have an idea if spikes or some rubber isoproduct will give me a better sound? Any brands of either that you would recommend? Thanks.