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Reviewed on May 15, 2015

Sony X850C TV REVIEW

This tv was replaced by the Sony X850D

Type : LED
Resolution : 4k
Refresh Rate : 120 Hz

The Sony X850C 4k TV has good overall picture quality, except when viewed at an angle - the colors lose saturation. The blacks are great and it doesn't have much motion blur.

Test Results
Design 8.5
Picture Quality 7.6
Motion 8.6
Inputs 8.2
Sound Quality 5.9
Smart Features 8.0
Pros
  • Good motion handling, with full control over the backlight flickering.
  • Great picture quality in both a dark room and a bright room.
Cons
  • Limited viewing angle.
  • Poor gray uniformity.

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Summary

  • 7.8 Mixed Usage
  • 7.7 Movies
  • 7.5 TV Shows
  • 7.5 Sports
  • 8.5 Video Games
  • 7.8 HDR Movies
  • 8.1 HDR Gaming
  • 7.8 PC Monitor
Mixed Usage 7.8

The Sony X850C is a great 4k TV. It has deep and uniform blacks, little motion blur, and great 1080p upscaling. The input lag could have been better for gaming though, but because of its good backlight control, it is still a great gaming TV.

Test Results

Misc
Power Consumption : 72 W
Power Consumption (Max) : 162 W
Firmware : PKG2.173.0010NAB - Android 5.0.2

Thickness
Max Thickness : 2.00" (5.1 cm)

Borders
Borders : 0.51" (1.3 cm)

8.3 Contrast
Native Contrast
:
3877 : 1

This TV's contrast is very good, so the blacks are deep.

8.0 Reflections
Reflection
:
1.8 %
Screen Finish
:
Semi-gloss

Its semi-gloss finish doesn't reflect a lot of light.
The Sony X850C has average maximum luminosity, and can get bright enough for a room with a few windows.

Pixels
Rear Inputs
Side Inputs
Remote
Remote : Smart

9.4 Black Uniformity
Native Std. Dev.
:
0.745 %

The black uniformity is really great. No noticeable clouding.

7.9 Input Lag
1080p @ 60Hz
:
35.3 ms
1080p With Interpolation
:
65.0 ms
1080p @ 60Hz Outside Game Mode
:
71.3 ms
1080p @ 60Hz @ 4:4:4
:
35.3 ms
4k @ 60Hz
:
31.7 ms
4k @ 60Hz @ 4:4:4
:
31.7 ms
4k @ 60Hz + HDR
:
31.6 ms
4k @ 60Hz @ 4:4:4 + 8 bit HDR
:
N/A

The 1080p input lag of the Sony X850C in game mode is good, but nothing exceptional. Outside of game mode, the input lag is surprisingly low - even when turning on the soap opera effect.

Update 10/26/2016: After the Latest firmware update (PKG3.531.0108NAB), the HDR input lag has gone down from 94ms to around 58ms, which is a good improvement and should be good enough for casual 4k HDR gaming.

Update 12/16/2016: A new firmware update has been released to upgrade the TV to Android Marshmallow. This has reduced the 4k input lag (including HDR). When in HDR mode, the TV can't display chroma 4:4:4 accurately as it is forced into the 'HDR Video' picture mode.

8.1 Motion Blur
Response Time
:
16.5 ms
Overshoot
:
0 ms

The motion blur is good. Also, you can control exactly how you want to set the backlight for motion purposes, without the soap opera effect. See Q&A section for more details.

4.2 Viewing Angle
LCD Type
:
VA
Color Shift
:
20 °
Brightness
:
30 °
Black Level
:
20 °

The colors shift as soon as you are a little bit to the side of the TV.

Update 01/06/2017: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results from 2016 TVs.

6.7 Gray Uniformity
50% Std. Dev.
:
4.930 %
50% DSE
:
0.190 %

Our unit has very little dirty screen effect. However, the top part of the screen is significantly darker, as are the edges and corners.

Stand

Dimensions of 55" TV stand: 25" by 9".

8.5 3D
3D
:
Yes
3D Type
:
Active

There are no 3D glasses included with the TV. 3D is good, but there is a very slight amount of crosstalk.

8.0 480p Input

480p content like DVDs look good without being over-sharpened. Be sure to have the latest firmware update installed, since when first tested, the upscaling was sub-par, but was fix with a firmware update.

8.0 720p Input

720p content also looks good once upscaled with the latest firmware installed.

9.0 1080p Input

1080p upscaling is great. In some cases, it's better than Samsung's UHD TVs, although not in every scene.

10 4k Input

4k movie looks good and very sharp.

0 Local Dimming
Local Dimming
:
No
Backlight
:
Edge (only 55")

6.8 HDR Peak Brightness
HDR Peak 2% Window
:
418 cd/m2
HDR Peak 10% Window
:
418 cd/m2
HDR Peak 25% Window
:
418 cd/m2
HDR Peak 50% Window
:
418 cd/m2
HDR Peak 100% Window
:
418 cd/m2
HDR Sustained 2% Window
:
418 cd/m2
HDR Sustained 10% Window
:
418 cd/m2
HDR Sustained 25% Window
:
418 cd/m2
HDR Sustained 50% Window
:
418 cd/m2
HDR Sustained 100% Window
:
418 cd/m2

Update 11/14/2016: We retested the peak brightness with HDR. In HDR the peak brightness is about 100cd/m² more than what you get in SDR.

9.3 Pre Calibration
White Balance dE
:
1.50
Color dE
:
1.1424
Gamma
:
2.24

9.7 Post Calibration
White Balance dE
:
0.36
Color dE
:
0.5487
Gamma
:
2.2

8.1 Color Gamut
Wide Color Gamut
:
Yes
DCI P3 xy
:
89.35 %
DCI P3 uv
:
95.83 %
Rec 2020 xy
:
65.39 %
Rec 2020 uv
:
72.15 %

6.8 Frequency Response
Std. Dev. @ 70
:
4.31 dB SPL
Std. Dev. @ 80
:
4.51 dB SPL
Std. Dev. @ Max
:
6.54 dB SPL
Max
:
94.3 dB SPL
Low-end Cutoff
:
113 Hz

This TV does get loud but the bass extension and the frequency response, especially under heavy load, is not good. Pumping may be present too.

4.2 Total Harmonic Distortion
Distortion @ 70
:
0.026
Distortion @ 80
:
0.060
Distortion @ Max
:
4.163

Acceptable distortion under comfortable listening levels, however under louder volumes the distortion jumps to unacceptable levels.

10 Supported Resolutions
1080p @ 60Hz @ 4:4:4
:
Yes
1080p @ 120Hz
:
Yes
4k @ 30Hz @ 4:4:4
:
Yes
4k @ 60Hz
:
Yes
4k @ 60Hz @ 4:4:4
:
Yes

To enable chroma 4:4:4, set the mode to either Game or Graphics.
Just like with last year's Sony TVs, 1080p @ 120Hz produces little artifacts (lines), but this shouldn't be too bothersome while gaming.
Update: With the new firmware update PKG2.463.0010NAB, This TV now supports 4k @ 60Hz @ 4:4:4. To enable this, go to Home button - Settings - External Inputs - HDMI Signal Format - Enhanced (new).

10 24p Playback
Judder-free 24p
:
Yes
Judder-free 24p via 60p
:
Yes
Judder-free 24p via 60i
:
Yes

For the reverse 3:2 pulldown, set Motionflow to TrueCinema. It won't add the soap opera effect.

10 Motion Interpolation
Motion Interpolation (30 fps)
:
Yes
Motion Interpolation (60 fps)
:
Yes

10 Gradient
Color Depth
:
10 Bit

Total Inputs
HDMI : 4
USB : 3
Digital Optical Audio Out : 1
Analog Audio Out 3.5mm : 1
Analog Audio Out RCA : 0
Component In : 1 (shared)
Composite In : 2 (shared)
Tuner (Cable/Ant) : 1
Ethernet : 1
DisplayPort : 0
IR In : 1
SD/SDHC : 0

Inputs Specifications
HDR10
:
Yes
Dolby Vision
:
No
5.1 Passthrough ARC Dolby Digital
:
Yes
5.1 Passthrough ARC DTS
:
Yes
5.1 Passthrough Optical Dolby Digital
:
Yes
5.1 Passthrough Optical DTS
:
Yes
HDMI 2.0 Full Bandwidth : Yes
ARC : Yes (HDMI 4)
USB 3 : Yes (1)
HDCP 2.2 : Yes
CEC : Yes
MHL : Yes (HDMI 2)
Variable Analog Audio Out : Yes

10 Image Flicker
PWM Dimming Frequency
:
0 Hz
BFI
:
Yes
BFI Frequency
:
60 Hz
BFI In Game Mode
:
Yes
10 Ads
Ad-free
:
Yes
Opt-out
:
N/A

Differences between Sizes and Variants

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