Naturally, we calibrate every home theater that we review. The Optoma HD23 received the usual treatment. This time, Mike got to calibrate it before I really started watching the HD23. Since Reference and User seem identical. I could compare Mike's finished calibration results with the out of the box default by comparing User (post adjustment), to Reference.
Our calibrations, including the Optoma HD23, are normally limited to a grayscale calibration (adjusting the balance of Red, Green, and Blue), along with brightness, contrast, color saturation, tint (where applicable), etc. We rarely calibrate the individual colors on lower cost home projectors like the HD23. That's a moot point in this case, as the HD23 lacks a full CMS with that abililty.
Let's take a look at the numbers: