Thanks, Shawn. When I calibrated my 990 I used its internal test tones. I have the DVE disk but I have not used pink noise from it to set the audio. M&K recommended using pink noise (one speaker at at time) to align the tweeter to the primary listening position; they said it would "snap" into place (Skyblazer noted something similar). Looks like I have two reasons, speaker alignment and volume to reference, to break out the DVE disk.

The ability to distinguish less than 1db changes between speakers is one of the reasons several gunslingers (including me) would like to have 0.5db versus 1db increments in the 990 speaker calibration. My old receiver had that ability and it was particularly helpful when fine tuning the center channel.