I've found that a center does more harm than good with what is traditionally considered the 'soundstage'.
The autocalibration routines in most AVRs are going to set the center volume to be equal to that of the fronts because from an HT-centric perspective, dialog is equally important as L/R content.
But for music, what ends up happening, from my experience, is that this is too high a level and the soundstage becomes non-descript, almost 'mono' sounding.
For multi-channel music, or some of the HT modes (such as NEO6 or PLII, etc, et al), I manually lower the center level until some semblance of L/R separation and soundstage 'returns', then save the setup in one of the memory settings.
For 2-channel, all the funny sound modes get turned off and I get much better soundstage results with just L/R.
The autocalibration routines in most AVRs are going to set the center volume to be equal to that of the fronts because from an HT-centric perspective, dialog is equally important as L/R content.
But for music, what ends up happening, from my experience, is that this is too high a level and the soundstage becomes non-descript, almost 'mono' sounding.
For multi-channel music, or some of the HT modes (such as NEO6 or PLII, etc, et al), I manually lower the center level until some semblance of L/R separation and soundstage 'returns', then save the setup in one of the memory settings.
For 2-channel, all the funny sound modes get turned off and I get much better soundstage results with just L/R.