Is there a way you can try some floor covering (rug, blankets, etc.) to check how and if the overall sound changes? It may be dependent on some details of your situation, but impact may be more pronounced than coupling/uncoupling/spikes/rubber. Which is not to say you could not play with all possible combinations, of course.
Just confused
Hi I am fairly new to using high quality audio equipment. I have assembled all of the gear I want for listening/enjoying the music. Of course it’s only a matter of time before you ask yourself “What if?”. I understand that room acoustics matter so I am off trying to implement acoustic panels - some good relatively consistent advice here. What I struggle with is the subject of vibration control/isolation ... the advice from the community is not very consistent. The floor in my listening room is slab cement with ceramic tiles on top. I have Avant-garde Uno speakers (with spikes since that is they way they came), REL subs (rubber feet) and effectively an unbranded equipment rack (with spikes). Are spikes what I should remain with for this kind of surface? Does it make more sense to decouple the speakers and rack from the floor with some kind of isolation device? Should I be replacing the current metal spikes with “cones” (or other device). Should I use the same device for speaker and rack? I just want to avoid shelling out a bundle of money for something that may turn out being a negative. Thanks in advance for your patience with my naive questions.