Switzerland ! Would love to visit there some day..
You bring up an interesting question.. Does additional weight applied to the speaker enclosure (internally or externally) add or detract from the speakers performance ??
If making the enclosure walls as solid as possible (no vibration) wouldn't holding the enclosure solidly on the floor increase it's performance in a positive way ?
I have asked Alan before about adding my own veneer to the M80 cabinet, and it's effect.. If I remember, he said that this would improve the cabinets performance, as each addtional layer of cabinet construction increases the stiffness of the walls.. This translates into less sound coloration by the cabinets vibrations.. A good thing..
Now, having said that, would hanging them in the air have just the opposite effect, as the entire cabinet would be allowed to vibrate ? Or, would you gain in hanging, by the fact that you can control the distance to adjacent surfaces, (walls/floor/ceiling) eliminating their effect on the sound waves emanating from the speaker ?


LFE ! The rest is just details..