My center speaker has always sounded like this and figured it to be normal. All of the drivers seem to work but voices tend to sound muddied and overly chesty, especially male voices. When I to switch to phantom center, dialog sounds a lot more natural and coherent. My mains are RT1000i's btw. I have the powered subs in these turned off. I tried using my RT7 as a center speaker and the sound was much more in line with what I get with phantom center.
Is there something wrong with my CS400i?