Some thoughts... How tall is your TV? The center channel should be placed at ear level if at all possible and if not it should be pointed at ear level if you catch my drift. In other words if there were a laser beam coming directly out of the speakers it should burn a hole in your nose. The dialog coming out of a center is very directional and if the speaker is not pointed or positioned to ear level, you will not be maximizing its capabilities.
Auto setup cannot match a good ear or a good SPL meter setup.
