3 or 4 cones under speakers /cdp which better WHY

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.

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.