Removing spikes... Now my speakers sing

"Find all the things wrong with that statement."

Okay, I'll bite...I think they are both saying the same thing - they are absorbing the cabinet vibrations by adding the damping material...

Buzzz! (sound of obnoxious buzzer)

asahitoro
Use your vibrapods only not the cones question of stability.  You may add 5 or 6 vibrapod to match the weight of your speaker

mikedeu, see the comment from edstrelow, try with sorbotan or other damping thing to make tests, yes there are many different type of speakers and floor.  You have to try and make tests, it is not great expenses

milpai, yes there are many type, but many prices also, some are expensive