Hi,hate to tell you guys but this is a method of resonance distribution and its effects can clearly be heard.I've experimented with numerous devices (washers,cones,cone bases,Totem Beaks,different materials:brass,lead,steel,aluminum,etc.)on various positions on top of my Vandersteen 3A's with amazing results.You can tune your speakers to your liking if you're willing to experiment and invest your time.Downside is you can go brain dead trying various combinations.I've settled on a combination for my speakers,and I'll never remove the devices.Those who have visited my room,have also easily heard the differences.Try a quarter in each front corner with a dime centered between them as a starting point and go from there.For additional details email me with the speakers you're using.
