Originally Posted by dazkyl
What is the reason for some movies such as Harry Potter and the chamber of secrets i need to keep the volume at about 45 to hear dialogue well then i need to lower the volume again for actions parts like fighting etc because it comes too loud?
Movies aren't standardized like gallons of milk, and the way they are mixed is prone to some variations.
That all said, it is my experience that if you get your system set up right
, one volume setting usually works for the entire movie.
Every speaker is calibrated with spl meter and night mode is off.
The idea that calibrating speakers with a SPL meter represents any kind of fine tuning is a wish, not a truth. It beats random settings but not much else.
If you want the dialog to balance as well as possible you also need to work over the timbre matching of your speakers, which is not guaranteed by buying speakers from the same manufacturer, as the location of the speakers varies and is very signficiant.
This is one reason why people are so pleased with systems that are set up by professionals or have AVRs with their own built in system tuning facilities like YPAO, MCACC or Audyssey. A SPL meter is a very blunt stick compared to the tools that many people are using these days.
Center speaker is also set to "2dB higher than than the fronts for better dialogue hearing.
Maybe you need to add more, or maybe you need to work over your system for levels, inter speaker timing, and equalization using measuring tools like a measurement mic, mic preamp/ computer interface and software like Room Eq Wizard.
You may even have room acoustics issues to deal with.