For the last week or so I been trying to get the Center dialog on my vp180 to sound less like voices coming out from a box. I tried different crossover setting, re-calibrating ARC also re-check the connection and still doesn't seem to help much. I wonder if I need to upgrade to the HP version and run full range? It's getting frustrating. Also the dialog is very low and doesn't match the soundstage very well. Maybe I'm placing my speaker incorrectly. Any advice would greatly appreciated.

Link to a picture I taken of my speaker placement

Speaker placement pic