OPPO DV-980H audio problem?

With my new Oppo DV-980H player I can’t seem to get the dialog voice louder or at least a little better Than the background sound. I have a Polaroid 26" LCD HDTV, and I’m using the speakers that came with it.

I was hoping someone with experience could help me out.

Thanks Again.....

I doubt you can adjust the actual downmixing.
You could go through the settings to see if you find something that’ll help.