Chris,
It's hard to tell if the vocals are actually centered and it varies from CD to CD, some left, some right, etc..
The best way to center the soundstage is to play a female voice in mono on both left and right speakers at the same time. Then you adjust the speaker distance and toe-in to...
I don't have a Denon, but how is the volume represented on the Denon's front panel display? With a number like -10, -5, or 0 ?
What does Denon say about speaker, volume, and DD calibration in it's manual?
Typically you use the VE test DVD, the DVD remote control, the Denon remote control...
Actually the whole point of using a known calibrated test tone, like VE's 75dB, is precisely to set the entire HT speaker volume to a known reference standard. Typically these test tones (like VE) are -30dB less (quieter) than full "Reference Volume".
This means if I play the movie at a volume...