When listening to music, the voice should appear as if it is coming from the center channel, that is the best imaging. The other instruments will be in other locations.

It is my understanding that you want them about the same distance apart as you are from them. A slight toe in towards the center seat may help as well.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85