It is possible that spikes reduce energy transfer (extremely small contact point) but more likely they allow better coupling (especially on the carpet) to the floor. As long as floor has lower resonance point than 20Hz it will reduce speaker vibration (added mass). I use spikes, but in apartment building I would definitely use vibrapods.
Isolating Transmission Line speakers from floor
Gday, I have a set of Australian made Transmission Line speakers(as pictured) I live in a rental with floorboards, looking for a way to isolate them. Can anyone offer any suggestions?May also be needed for another rental in the future, which may have a concrete slab....
Cheers Andrew