Hiding speaker wires on tile floors is a matter of getting the wires out of traffic areas and blending them cosmetically into surrounding baseboards. Various companies make wire channel kits designed to mask the presence of wiring.
Determine the most logical pathway from the equipment rack to the speakers. Cut the speaker wire to this length, taking into account the bends and curves taken around the perimeter of the room.
Measure then cut the channel moulding to conform to the baseboards surrounding the tile floor, using the scissors. Temporarily lay out the moulding in your desired arrangement, including the right angle adaptors and other pieces necessary to fully conceal the speaker wire.
Slide the speaker wire into the opening on the side of the channel moulding, going segment by segment. Peel off the adhesive backing as you go, securing each piece along the wall or baseboard surrounding the tile floor.
If desired, purchase wire channel kits that offer the ability to screw to the studs on the wall. This is less destructive to drywall surfaces if removal is necessary. Paint or stain the moulding kits to fully conceal them against the wall.