I don't agree with Greg. I also had the VP150 and now have the VP180. The volume level of the dialog is definitely material dependent and also depends on how loud you watch a movie. A lot of movies have their dialog mixed to low. If you're watching a movie with an overall loud volume, even if it is mixed too low you'll hear the dialog properly just because it's loud. If you're watching a low volume, in some movies,while most of the movie will be at an appropriate level, the quiet scenes are barely audible. This used to drive me crazy when I only had the mains and is the major reason I got the center before the surrounds, so I can adjust the level when that happens. When I watch a movie at low volume, it is not uncommon for me to increase the center channel 3 or 4 dBs.
