I just purchased the Panasonic TH42HD6UY, and then got the AVIA home theater DVD. I had tweaked the settings before using the disc, then when I used it, I found that all of the calibrations, done so far, were best at the original factory settings. So unless anyone else knows otherwise, I'd say that if you leave the factory settings, it's probably pretty close to what it should be.....glad I spent the $40 on the disc!!! Hopefully it will help with my audio calibration when i get around to it.