you can still use spikes but you will need to get either the support discs or Target Spike Shoes. Support discs from Music Girect are all metal, they are affordable and do exactly what they supposed to besides there is no sound degradation. Target Spike Shoes that Cable Company sells are also affordable. They are metal on top but rubber on the bottom. I have spike shoes under my SolidSteel 5.4 component rack and Support Discs under my speakers. And use spikes without any damage to the floor.
How to stabilize speakers without spikes.
My wife won! In the interest of domestic tranquility I have relented. After living with carpet over wood floors and spikes on my speakers for many years, my wife wants to have a wood floor (maybe tile) installed in our house. I've always used spikes in my Vandersteens (2Ci) to stabilize them with a slight front tilt upward. What would you pros do now? As always, thanks for sharing your knowledge.
Tom
Tom