I recently mounted a shelf on the wall, behind my RPTV. I mounted the shelf and center channel such that the speaker is about 6 feet high from the ground. My listening position or ears are about 3.5 feet from the ground when I'm sitting. The tweeter on my floorstanding speakers is about the same height. Now, I do have my center angled downward to the point where its aiming at my face. Is this an issue?