Actually what needs to be done is simple, go to Home Depot rent a gas powered concrete saw, proceed to cut a trench roughly 4 inches deep by 4 inches wide in your slab, insert speaker wire, fill with quick drying hydraulic concrete, replace finish flooring: this will keep bugs, dust, pet dander, annoying kids, annoying relatives and magnetic flux waves from harming speaker signal. Oh I forgot you've got to wrap them in aluminum foil before you bury them.