Guys, you are missing the point. The goal of the little experiment above was to illustrate that in order to isolate a component one has to minimize as much as possible couplings. I did not recommended placing speakers on pillows nor did I recommended to isolate them from the floor. I merely suggested a simple experiment that should provide some insight into the physics involved. (This experiment can be done by anyone that is not completely deaf, has a hand with at least one finger and a computer with a fan that is not completely silent, i.e. a significant amount of the audiogoners. How many people here have an accelerometer Agear?)
Regarding the two companies discussed here, I should point out that their philosophy and goals are basically the same. (In fact all top companies in this field tell about the same stories.) Both types of footers discussed here aim at draining out into the floor unwanted vibrations from the component resting on them, i.e. neither is trying to isolate the component. What is different is the way these devices are trying to achieve this. That is, one is increasing coupling to the floor while the other one is attempting to make the flow of energy unidirectional.
About the resonance phenomenon Tbg, any 2 or 3 dimensional structure has characteristic frequencies called normal modes of vibrations (or eigen modes or resonant frequencies). The normal modes of vibrations of a structure represent the frequencies for which the transfer of energies between a structure and a source of vibration is maximum. Now, the normal modes of a structure are determined by the geometry of the structure and the distribution of mass in the structure (i.e. they are specific to each structure). Consequently, when placing a heavy speaker on the floor the resonant frequencies of the floor and also of the speaker will be affected. How significantly the normal modes change will be and which of normal modes will be affected depends on: the type of floor, how heavy the speaker, were you place the speakers in the room, where your room is situated in the building (e.g. ground floor, 1st floor, floor 100). As such, one (i.e. user or manufacturer) cannot know before hand which of these devices will provide the best result. One simply has to try them in his/her system.
I hope I made it clear that I am not saying that one device/approach/company is better than the other one. I also hope it is now clear that I am not trying to provide a solution - there isn't a general one. Like Dr. Lesurf, I have merely tried to provide logical arguments that show why some reviewers, manufacturer, sale persons and audiogoners make silly claims when the say that spikes actually isolate.
