Wow, thanks everyone for your responses. It sounds like it's an worthwhile inexpensive tweak to try. Now, sneaking the sand into the house without my wife finding out will be the tricky part. Truth be told, the vibrapods and cones have made a significant improvement on my CD player and turntable. I did not, however, really notice any difference when placing them between the speaker stand and speakers.
With respect to rounded spikes vs "spiky" spikes (sorry, no other way to describe it), is there an advantage. I figured the spiky spikes were for when your stands were on carpet, and the rounded spikes were for flooring. Elizabeth- I'll give your paper pressure test a try.
With respect to rounded spikes vs "spiky" spikes (sorry, no other way to describe it), is there an advantage. I figured the spiky spikes were for when your stands were on carpet, and the rounded spikes were for flooring. Elizabeth- I'll give your paper pressure test a try.