Speaker placement is critical in optimizing your sound environment.
Step 1:  Survey your environment and determine what areas you want covered.
Step 2:  Place your designated HOST speaker towards the center of the listening environment, ideally where there is a line-of-sight connection to the other connected speakers (or subwoofers).
Step 3:  Place the speakers around the perimeter of your listening area.  If the sound is statick-y, move the speaker to a location where there is a stronger connection.  Moving it a few inches or a few feet may resolve and improve the connection.