I use them under bed posts. Keeps the vibrations from disturbing neighbours.
Magico and Symposium
Just put a Symposium Super Plus under my Magico Q3s.Im using the unit with Copper spikes as i have a carpet/wood/concrete floor.First you must remove the stainless steal spikes then place speaker on Symposium platform. You will get better bass depth and detail,better stage and more information detail.This will work under any good floor standing speaker.