I NS 4 each of the pucks with my Yamaha 555 tower speaker system (3-way bass reflex, Waveguide horn, 100W) Piano finish black (piece).
I'm very satisfied. The problems caused by the speakers vibrations have subsided. What is beneficial to my cabinet and I just hope I have done my neighbor below me something good;)
Under my subwoofer I use way: Oehlbach Shock Absorber black