My priority is zero noise transmission to my neighbours, as I live in an apartment
Do spikes isolate or lock the speaker to the building structure? If I sit it on pads how much would that affect their quality of life?
Obviously volume is most key, that’s never over moderate, but I want to enjoy my music without being a total dick to those around me
OP keep in mind that passive/DIY approaches to reducing sound transmission will at most net you 3-6db in some specific frequency ranges, but not much more.
Likely you will get a couple db reduction that might help reduce total transients I.e. kick drum