Originally Posted by Zues
Not only my experience but countless reviews also. A tv or projector that measures and has good color accuracy will usually perform as the reviews states. A tv or projector with noteable bad color accuracy the same. Now you can try to skew that and say the manufacturers calibrated them special for the reviews, but i don't buy it. Especially when many perform poor. But go ahead and listen to those who say all models of even the exact same kind perform differently. Do you have any 'claims' they all perform differently? Maybe with different sources is all i can imagine.
"Countless reviews" provide measurements on ONE display. I have copied "review settings" to the same model display I have on hand and get readings as much as 25% different than the review. I have calibrated about 30 samples of a single 50" Samsung plasma panel model (50A550, a current model due to be replaced shortly). These have 7 gamma settings and I've measured 2.3 gamma with User Menu gamma settings of -2, -1, 0, and +1 on various displays so which one should the average A550 owner use? Gamma will be off by about 0.1 for each setting. So if you pick the "0" setting your Gamma could be 2.3, but it could also be 2.4, 2.2, or 2.1 - and for me those choices aren't "close enough"... 2.4 is clearly too high on these panels and 2.3 is a more 3-D looking than 2.2. 2.1 is clearly too bright for movies in a dark room. These Samsungs also have CMS controls and White Balance controls and the "agreement" between panels is almost zero. The service menus in these panels don't even have the same settings everywhere (and this is before being "tampered with" by the owner or calibrator).
Chances of copied settings being better than settings you arrive at using a test/setup disc are maybe 1-in-10 at the very best, 1-in-20 is more realistic.
On the other hand, Pioneer Kuro panels don't have much variation in comparison... first, they lack many controls the Samsung panels have so there are fewer settings to deal with, and they are (especially the Elites) closer to being "right" than "lesser" plasmas. And when you (as a calibrator) do make adjustments, the adjustments tend to be fairly small. But STILL you don't make the same adjustments to every Kuro panel - even though the range of adjustment settings may be small, there's still a range and using the settings from some other panel isn't likely to be the best settings for another panel. I wish they were, I could calibrate a Kuro a lot faster if I didn't have to find the right settings for each panel.
You are wishing for something that is not true based on real measurements of real video displays.
Furthermore... not long ago, I calibrated a $15,000 Marantz projector with a $5000 Lumagen video processor and a motorized anamorphic lens with a 2.35:1 Stewart screen. They had been mail ordered from AVScience... the people who operate this forum. The projector and processor were calibrated together before they were shipped to the customer who had everything installed and was initially happy. I got called to calibrate the setup and was expecting a "touch-up" sort of calibration since the pair had already been calibrated before being shipped. What I got was quite large errors in grayscale, gamma, and color - as if no calibrating had ever been done. Did AVScience NOT calibrate the setup? No, I'm sure they did, there were settings changed in both the projector and Lumagen processor and I'm sure they got a good result. But 500 hours on the lamp and being setup in this specific room with this specific carpet, ceiling, walls with this specific screen, anamorphic lens, and these sources all conspired to make the CURRENT measured results VERY different that what AVScience achieved. The end result was spectacular on-site calibration. In another 500 hours, just the changes the lamp goes through will produce different measurements and different Lumagen settings. When the lamp is changed, everything CAN and often DOES change because lamps don't have consistent spectra from sample to sample. I used to work on high-end imaging systems and we had to test every lamp after a 50-hour burn-in for light spectra and 50% of the lamps were rejected. We started with $500 lamps and had to charge $2000 for them because of the testing and high numbers of unusable lamps.
You are dreaming if you think products built with components that have tolerances of +/-10% to +/-20% (mil spec components are NOT used in consumer video products) will be able to share settings with any reliability or even any improvement.
That said... yes, you can get some valuable info from various video display threads here... especially if someone has correctly evaluated the "junk" settings and made appropriate recommendations. But everything else (contrast, brightness, color, CMS, white balance) is just a guess because of equipment used for the measurements and the displays themselves. If someone properly analyzes the effects of the Sharpness control... that is one setting that can be reliably shared from display to display. Black Level is another that can be reliably shared (if everybody is using 16-235). But there aren't many like that.