Bose Centerpoint question

Maybe centerpoint increases the volume of the center speaker (actually, it's probably a phase effect), but I'm definitely getting sound from it with CP turned off.
 
Same here with my '16 GT. Center speaker is much more prominent with CP on, but it is on at lower a level with CP off.
 
I just started using USB music files. I found that some voices are accentuated and clearer with CP turned on. This is opposite to what I found with radio (well, radio doesn't sound better with CP, to me).
 
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