These are the settings we used to calibrate the 55 inch Element Fire TV (EL4KAMZ5517) and we expect them to be valid for the 43" version (EL4KAMZ4317 ), the 50" version (EL4KAMZ5017) and the 65" version (EL4KAMZ6517). These are good for most content, from watching movies and TV shows to gaming. For Gaming, some little adjustments are needed, and they are listed in the 'Gaming settings' section.
The first thing we did was to select the 'Custom ' 'Picture Mode' since this is the picture mode that gives you the most control over the TV settings. For our totally dark room, we set the 'Backlight' to 33, but if you are in a bright room, or find our settings too dark, you should increase 'Backlight' as much as you want and it won't change the picture quality.
When selecting the 'Custom' picture mode, the TV will display a list of other settings, that are only available when selecting the 'Custom' picture mode. We left 'Brightness' at 50, 'Contrast' at 50, 'Saturation' at 50, 'Tint' at 50, all their default value. For 'Sharpness', we set it a 0 to prevent any over sharpening. Note that 'Sharpness' can only be disabled in the 'Custom ' 'Picture Mode'.
In the 'ADVANCED OPTIONS', we selected the 'Auto ' 'Zoom Mode' since when set to 'Auto', the TV will automatically adjust the size of the input to match the TV screen. 'Color Temperature' was set to 'Warm' since it was the most accurate color temperature and it brought us the closest to our calibration goal, but if you find the picture a bit too dull or yellowish, change 'Color Temperature' to something colder. The 'Noise Reduction' was left to 'Off' since we did not want to alter the original look of the displayed video content, but it can be turned on to a different degree if you are watching some older low-resolution and/or analog content where you see too many artifacts or too much noise (shimmering background or grain).
The 'Motion Smoothing' is the feature that controls the motion interpolation (also named soap opera effect) and was set to 'Bypass' (turned off) for the review process. You can add soap opera effect to a different level depending if you want it to be stronger or less. Note that the stronger you set it, the more motion interpolation artifacts are going to be introduced. You can read more on the subject here, on the review page. The 'Color Mode' was left to 'Auto' since when set to 'Auto', the TV will select the good 'Color Mode' to match the source color format. Finally, we set the 'EDID Mode' to 'Mode 2' since it is on 'Mode 2' that the TV will let the HDMI ports use the full HDMI bandwidth. Unless you are using some older AV equipment that doesn't support the latest HDMI 2.0 standard, you should set the TV to use 'Mode 2'.
The only benefit there is to setting the TV on the 'PC/Game' 'Picture MODE' is when you are playing some 1080p video games since the input lag will be reduced marginally. If you are gaming in 4k, there is no benefit at all in using the 'PC/Game' picture mode. In fact, we have found that when displaying a 4k@60Hz resolution, the TV shows visual glitches, and sharpening can't be disabled, so in that case, you are better using the 'Custom' picture mode if you are gaming in 4k.
Unfortunately, since this TV has some very basic picture setting, there is no option at all to do a calibration on it, as such, we can't provide any calibration data.