Another option might be weatherstripping. You have the choices of different thicknesses and densities. I've used it for years.
Speakers slipping on speaker stands
I find that my speakers slip around a bit more than I'm comfortable with on the platform of my speaker stands. Is there anything I can do to make the placement more secure, without doing anything permanent to my speakers or stands? They haven't really come close to falling off but they do slide around and spin a bit when I touch them.
Any advice?
Any advice?