Some interesting findings in side by side comparison testing the 77 C9 to the 65 C8 via a 4K full 2.0b bandwidth splitter after trying to get the TVs to match each other as closely as possible in SDR,HDR and DV. All with Standard mode which is my go to preference (sorry purists and calibrators.) Sets have never been professionally calibrated and are on latest FW. Nevertheless I'm fairly confident I know what I'm doing even though I tend to prefer a cooler picture to the overly warm look of Cinema and Technicolor modes. I do try to eyeball for accurate color and I've used self calibration discs (S&M, Disney) in the past on the C8. (I know, I know, no need to lecture.) And yes, I know the same settings will look different on different panels. Nevertheless, there seems to be more than panel variance going on here.
1) The C9 renders huge swaths of shadow detail that just don't exist on the C8 in both DV and HDR all without any artifacts or blobs. Absolutely fabulous, I was pretty amazed. And yes this is with brightness 50, contrast 100 and medium 2.2 gamma, and correct oled light settings depending on the mode for each TV. A good example is the dark kids bedroom scene in the The House with a Clock in its Walls with both sets on OLED 100 Brightness 50. Probably 30% of the image is just missing on the C8!
2) The C9 implements Dolby Vision VERY differently depending on the scene. HDR is more or less the same, but not DV. The Apple TV 4K screensavers in DV, and only CERTAIN ones, show dramatic differences. Where the C8 is overblown with lost detail, the C9 delivers a considerably darker picture but with a lot more detail. A great example is the Great Wall of China screensaver. HDR modes are the same. And yes, again, settings on both sets are the same, and other scenes look completely identical. It's as if the C9 processes different or more DV information for the same scenes. Would love to know which is "correct". Since the China scene look the same in HDR, I really do think these screensavers have DV encoding
3) Skin tones are more natural on the C9 and less yellowish. This could be due to panel variance on uncalibrated sets, I just don't know. On the flipside, the C8 is better with dark reds, rendering them richer (Superman's cape in the dark). It's only with very specific hues that the differences are there.
4) In order to get DV and HDR to look as punchy on the C9 as on the C8, I have to set Dynamic Contrast to Medium on the C9 where I can get away with Low on the C8. A good example of this is the dark scene in Batman vs Superman with Batman on the roof and his HDR/DV "shining eyes" mask in full effect. If I don't increase the Dynamic Contrast on the C9, it looks more washed out than the C8 with less impact. I don't know which is more correct, it's a preference thing.
5) The C8 after all manner of tweaking is still a tad brighter with brightly lit content at least in HDR/DV modes. I am thinking this could be due to to pixel size or density, i.e. the tighter pixel density of the 65 vs the 77 at the same light output makes the 65 look brighter whereas the 77 is naturally more diffuse with more space between pixels or larger pixels? Not really sure if they use bigger pixels or more space between them for the larger TV. I'm not too upset, because I do like to watch DV/HDR content in the dark which makes things like Apple TV menus on the C8 a little TOO bright. (considering you don't want to lower oled light for those modes)
I wanted to test my PS4 Pro with both sets, but I actually blew the circuit breaker in my house once I turned on the console with both TVs on since all power was coming from one outlet. So tonight I will use an extension cord for one TV so it goes on a different breaker. This is a new house too, but the breaker is only 15 amp and wiring is probably too low a gauge for a bigger one. Ugh. Cheap builders.
Last edited by Flavius; 06-19-2019 at 06:51 PM.