Because the Holographic Image works by phase cancellation of the unwanted second sound arrivals, accurate speaker position is required. You must make sure that the left speaker is the same distance away from you as the right speaker. For the best Holographic image, the left speaker should be set exactly the same distance and angle away from your listening position as the right speaker. It is recommended that you use a tape measure to set them up to be the same distance, within about half an inch tolerance.
Actually I think the manual says within 1/4" . Yes move your speakers even if only temporarily.