3 or 4 cones under speakers /cdp which better WHY

Back to geometry class; three points define a plane.

hello for the 3 point planes concept to be accurate the 3 cones must be placed in a exact perfect triangle configuration. Now this is easily accomplished with light components or speakers but try it with a pair of 485 pound Dunlavy 5 speakers its really not possible. I would recommend using 4 cones in situations like this, especially if your in California.

I actually do not find that putting the three cones in an equadistant triangle as Mejames suggests to be the best practice. I find that putting one under the transformer in a component and the other two at the opposite edges to work best. With speakers I put one on the front edge where the greatest weight from the drivers is and then two at the back edge. Again, symmetry is not very important.

Along the lines of what Marty has said, I always thought that the key was to place cones/points under the areas of the component which are most vulnerable to vibrational effects FIRST, then distribute the other one or two to provide balance and overall stability.