" bolt your speakers to a concrete floor" - this is completely wrong.
The whole purpose in "decoupling" the speakers, and sub, from the floor is to minimize, or eliminate, the vibration from reflecting back into the speaker. This reflecting vibration muddies up the sound of your speakers. Eliminating the reflecting vibrations tightens up your bass, and the speakers’ sound becomes more clearer. Bolting the speakers to the floor will only insure that the vibration passes from the speaker into the floor, and reflecting back into the speaker cabinets.
Spiking the speakers will only minimize this vibration. The best ways are to use springs, as suggested, seismic podiums, or energy dissipating pucks.
The whole purpose in "decoupling" the speakers, and sub, from the floor is to minimize, or eliminate, the vibration from reflecting back into the speaker. This reflecting vibration muddies up the sound of your speakers. Eliminating the reflecting vibrations tightens up your bass, and the speakers’ sound becomes more clearer. Bolting the speakers to the floor will only insure that the vibration passes from the speaker into the floor, and reflecting back into the speaker cabinets.
Spiking the speakers will only minimize this vibration. The best ways are to use springs, as suggested, seismic podiums, or energy dissipating pucks.