If you don't have a dedicated center channel yet, you will notice this more with DTS than Dolby Digital. DTS does, in my opinion, a much better mix of the audio, and in that process, they make the 6 channels of 5.1 more descrete than DD (again, in my opinion)...

I LOVE DTS. I hunt for movies in DTS over just DD versions, but without all of the speakers, you will be missing some of the descretely mixed channels (like the center channel)...

Get the center, and you should be fine.

Farewell - June 4, 2020