The "word on the street" is that you need spikes if your wood floor is less than rigid (e.g., in a pre WW-II frame house). If you live in a well-built home or apartment building, you don't need them for sonics (Maybe you need them if you have ultra shag carpeting).
However, if you're an apartment "Dweller", spikes are MANDATORY to isolate your sound from your neighbors (nothing transmits bass like a speaker sitting on the floor).
However, if you're an apartment "Dweller", spikes are MANDATORY to isolate your sound from your neighbors (nothing transmits bass like a speaker sitting on the floor).