Rather than starting a new thread, I’ll post some of my observations here. As others have suggested, level matching is important for proper playback. Also, try the idea of setting the 2 front speakers to “phantom” mode – that is, in the receiver setup, tell it there is no center speaker. Watch a clip of a film you’re familiar with both ways, and see what, if any, difference there is. As others have suggested, it may just be that the scene was engineered in a manner to drown out voices with other sounds.
My situation is this – I employ the “phantom” approach, which for the most part works fine. I have noticed though on certain cable channels, and even during certain commercials, the “center” voice is very low. In the case of a current Mr. Goodwrech commercial, the voice is barley audible. Likewise, I was watching a James Bond flick on universal HD yesterday, and the voices were almost unintelligible. The preamp indicated the soundtrack was coming through in (and played back in) Dolby Digital. Any ideas what gives there?
Movies from my BD player are fine, but I do use the analog output, and in the setup on the player, I told it there was no center channel speaker.