In general, you can couple the speakers to the floor using spikes and have the vibrations pass on through to the floor or you can isolate the speakers from the floor. I have Opera Platea floorstanders and prefer to go with a vibration isolation/ control approach. I live in an apartment house on a busy street in Queens (NYC) and feel that vibration control is more of an issue. I use neoprene rubber/cork isolation pads on top of 1 1/2 inch thick bamboo cutting boards to eat up the vibrations. System sounds great.
Regards,
Rich
Regards,
Rich