audiosensGeneral rule to couple (spike) or de-couple (not spike) speakers to the floor, comes down to what floor you have.
1: Cement slab floor on mother earth (not cement sheet) = spike (couple)
2: Suspended floor wood, sheet, (includes cement sheet) = no spike (decouple)
If you spike a speaker into a suspended floor as in 2, you transfer the bass of the speaker into that floor, making it a sound board for the bass and ruining it.
Cheers George