There are many reasons why your current center may not sound clear and they have nothing to do with the actual speaker. Sorry if I shouldn't take your comment literally, but no center speaker will sound clear just sitting "on the floor." Positioning for the center and adjustments in the processor can greatly affect how it sounds.
Sorry again, but it makes no common sense to use a center that's not timbre matched to the L&R. The only result will be degradation.
Sorry again, but it makes no common sense to use a center that's not timbre matched to the L&R. The only result will be degradation.