When given the choice of choosing the db for each speaker using the OSD, the choice for each speaker goes up +12. My question is, does it matter if I set the levels to 12 (center and fronts, I know rears should be lower) and just keep the master volume control, while watching a DVD for example, at less than the midway point or set the levels lower and crank up the master volume to more than halfway? Thanks for any help.
It is basically the same thing. The dB adjustment is used for fine tuning so if you max them out, well you can then tune no more! I would leave them all "centered" and make minor adjustments to each depending on your room, where you sit in it, and how you like to listen.