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  1. Table of Contents
  2. Top
  3. Main Differences
  4. Design
    1. Style
    2. Accelerated Longevity Test
    3. Stand
    4. Back
    5. Borders
    6. Thickness
    7. Build Quality
  5. Picture Quality
    1. Contrast
    2. Blooming
    3. Lighting Zone Transitions
    4. Contrast And Dark Details In Game Mode
    5. HDR Brightness
    6. HDR Brightness In Game Mode
    7. PQ EOTF Tracking
    8. SDR Brightness
    9. Color Gamut
    10. Color Volume
    11. Local Dimming
    12. Pre Calibration
    13. Post Calibration
    14. Gray Uniformity
    15. Black Uniformity
    16. Viewing Angle
    17. Reflections
    18. Local Dimming In Game Mode
    19. HDR Native Gradient
    20. Low-Quality Content Smoothing
    21. Upscaling: Sharpness Processing
    22. Pixels
    23. 720p Input
    24. 1080p Input
    25. 4k Input
    26. 8k Input
    27. Temporary Image Retention
    28. Permanent Burn-In Risk
  6. Motion
    1. Response Time
    2. Flicker-Free
    3. Black Frame Insertion (BFI)
    4. Motion Interpolation
    5. Stutter
    6. 24p Judder
    7. Variable Refresh Rate
  7. Inputs
    1. Input Lag
    2. Supported Resolutions
    3. PS5 Compatibility
    4. Xbox Series X|S Compatibility
    5. Inputs Specifications
    6. Input Photos
    7. Total Inputs
    8. Audio Passthrough
  8. Sound Quality
    1. Frequency Response
    2. Distortion
  9. Smart Features
    1. Interface
    2. Ad-Free
    3. Apps and Features
    4. Remote
    5. TV Controls
    6. In The Box
    7. Misc
  10. Comments

LG CX OLED vs TCL 6 Series/R646 2021 QLED

Side-by-Side Comparison

Products

LG CX OLED
TCL 6 Series/R646 2021 QLED

Tested using Methodology v1.6

Updated Feb 07, 2025 06:49 PM

SEE PRICE
Amazon.com

Tested using Methodology v1.11

Updated Feb 07, 2025 06:35 PM

SEE PRICE
Amazon.com
LG CX OLED Picture
TCL 6 Series/R646 2021 QLED Picture

Variants

  • OLED48CXPUB (48")
  • OLED55CXPUA (55")
  • OLED65CXPUA (65")
  • OLED77CXPUA (77")
  • 55R646 (55")
  • 65R646 (65")
  • 75R646 (75")

Our Verdict

LG CX OLED

TCL 6 Series/R646 2021 QLED

The LG CX OLED is better overall than the TCL 6 Series/R646 2021 QLED, but they use different panel technologies, each with advantages and disadvantages. The LG has an OLED panel with a near-infinite contrast, perfect black uniformity, and wide viewing angles. On the other hand, the TCL uses an LED panel that gets much brighter and doesn't suffer from the risk of permanent burn-in. Even though they each have HDMI 2.1 inputs and VRR support, the LG has a wider VRR range that allows it to go below 20Hz. The LG also has a much quicker response time for smoother motion.

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Notice: Two or more of the products selected have been tested with different test methodologies, so some of the results below aren't directly comparable. Learn how our test benches and scoring system work, and read more about the latest changes to our TVs test methodology.

Main Differences for

Threshold 

0.10

Mixed Usage 

8.8
8.0

480p Input 
 

8.0
3.0

Contrast 
 

10
8.9

Viewing Angle 
 

8.4
5.4

SDR Brightness 
 

7.0
9.0

Full Comparison

Design

Style  

Design Picture  

LG CX OLED Design Picture
TCL 6 Series/R646 2021 QLED Design Picture

Curved  

No
No

Show text

Accelerated Longevity Test 
 

Uniformity Pictures  

50-gray-24
Month 24
50% Gray
50-gray-24
Month 24
50% Gray

Longevity Graph  

See details on graph tool
See details on graph tool

Show text

Stand  

Stand Picture  

LG CX OLED Stand Picture
TCL 6 Series/R646 2021 QLED Stand Picture

Show text

Back  

Back Picture  

LG CX OLED Back Picture
TCL 6 Series/R646 2021 QLED Back Picture

Wall Mount  

VESA 300x200
VESA 300x300

Show text

Borders  

Borders Picture  

LG CX OLED Borders Picture
TCL 6 Series/R646 2021 QLED Borders Picture

Borders  

0.35" (0.9 cm)
0.35" (0.9 cm)

Thickness  

Thickness Picture  

LG CX OLED Thickness Picture
TCL 6 Series/R646 2021 QLED Thickness Picture

Max Thickness  

1.93" (4.9 cm)
3.66" (9.3 cm)

Show text

Build Quality 
 

9.0
7.5

Build quality picture  

LG CX OLED Build quality picture
TCL 6 Series/R646 2021 QLED Build quality picture

Show text

Picture Quality

Contrast 
 

10
8.9

Contrast Picture  

LG CX OLED Contrast Picture
TCL 6 Series/R646 2021 QLED Contrast Picture

Contrast 
 

N/A
39,900 : 1

Native Contrast 
 

Inf : 1
7,778 : 1

Show text

Blooming 
 

7.5

Blooming Photo  

TCL 6 Series/R646 2021 QLED Blooming Photo

Show text

Lighting Zone Transitions 
 

8.0

Preferred LD Video, Moving Object  

Local Dimming 
 

No
Yes

Backlight 
 

No Backlight
Full-Array

Dimming Zones Count Of Tested TV 
 

128

Show text

Contrast And Dark Details In Game Mode 
 

8.5

Blooming Photo In Game Mode  

TCL 6 Series/R646 2021 QLED Blooming Photo In Game Mode

Preferred LD Video, Moving Object In Game Mode  

Game Transitions With VRR And Preferred LD  

Show text

HDR Brightness 
 

7.1
8.2

HDR Hallway Photo  

TCL 6 Series/R646 2021 QLED HDR Hallway Photo

HDR Cityscape Photo  

TCL 6 Series/R646 2021 QLED HDR Cityscape Photo

HDR Landscape Photo  

TCL 6 Series/R646 2021 QLED HDR Landscape Photo

Hallway Lights (~1950 cd/m²) 
 

523 cd/m²

Yellow Skyscraper (~700 cd/m²) 
 

377 cd/m²

Landscape Pool (~300 cd/m²) 
 

240 cd/m²

Peak 2% Window 
 

760 cd/m²
660 cd/m²

Peak 10% Window 
 

817 cd/m²
1,051 cd/m²

Peak 25% Window 
 

465 cd/m²
1,085 cd/m²

Peak 50% Window 
 

311 cd/m²
872 cd/m²

Peak 100% Window 
 

152 cd/m²
851 cd/m²

Sustained 2% Window 
 

720 cd/m²
656 cd/m²

Sustained 10% Window 
 

776 cd/m²
1,035 cd/m²

Sustained 25% Window 
 

443 cd/m²
1,069 cd/m²

Sustained 50% Window 
 

293 cd/m²
869 cd/m²

Sustained 100% Window 
 

146 cd/m²
848 cd/m²

Automatic Brightness Limiting (ABL) 
 

0.101
0.025

EOTF  

LG CX OLED EOTF

Real Scene Highlight 
 

681 cd/m²

Show text

HDR Brightness In Game Mode 
 

6.7
8.2

HDR Hallway Photo  

TCL 6 Series/R646 2021 QLED HDR Hallway Photo

HDR Cityscape Photo  

TCL 6 Series/R646 2021 QLED HDR Cityscape Photo

HDR Landscape Photo  

TCL 6 Series/R646 2021 QLED HDR Landscape Photo

Hallway Lights (~1950 cd/m²) 
 

523 cd/m²

Yellow Skyscraper (~700 cd/m²) 
 

393 cd/m²

Landscape Pool (~300 cd/m²) 
 

232 cd/m²

Peak 2% Window 
 

749 cd/m²
639 cd/m²

Peak 10% Window 
 

804 cd/m²
1,038 cd/m²

Peak 25% Window 
 

457 cd/m²
1,094 cd/m²

Peak 50% Window 
 

320 cd/m²
886 cd/m²

Peak 100% Window 
 

152 cd/m²
870 cd/m²

Sustained 2% Window 
 

633 cd/m²
637 cd/m²

Sustained 10% Window 
 

768 cd/m²
1,022 cd/m²

Sustained 25% Window 
 

433 cd/m²
1,084 cd/m²

Sustained 50% Window 
 

302 cd/m²
882 cd/m²

Sustained 100% Window 
 

147 cd/m²
868 cd/m²

Automatic Brightness Limiting (ABL) 
 

0.096
0.024

Game Mode EOTF  

LG CX OLED Game Mode EOTF

Real Scene Highlight 
 

563 cd/m²

Show text

PQ EOTF Tracking 
 

8.0

PQ EOTF Graph  

See details on graph tool

600 Nit Tracking Delta 
 

0.0168

1000 Nit Tracking Delta 
 

0.0134

4000 Nit Tracking Delta 
 

0.0134

Show text

SDR Brightness 
 

7.0
9.0

Real Scene Peak Brightness 
 

321 cd/m²
800 cd/m²

Peak 2% Window 
 

459 cd/m²
690 cd/m²

Peak 10% Window 
 

456 cd/m²
1,027 cd/m²

Peak 25% Window 
 

414 cd/m²
1,053 cd/m²

Peak 50% Window 
 

340 cd/m²
836 cd/m²

Peak 100% Window 
 

176 cd/m²
804 cd/m²

Sustained 2% Window 
 

439 cd/m²
684 cd/m²

Sustained 10% Window 
 

435 cd/m²
1,019 cd/m²

Sustained 25% Window 
 

395 cd/m²
1,038 cd/m²

Sustained 50% Window 
 

324 cd/m²
833 cd/m²

Sustained 100% Window 
 

146 cd/m²
800 cd/m²

Automatic Brightness Limiting (ABL) 
 

0.069
0.023

Show text

Color Gamut 
 

8.6
8.3

Wide Color Gamut 
 

Yes
Yes

Color Gamut DCI-P3 Picture  

LG CX OLED Color Gamut DCI-P3 Picture
TCL 6 Series/R646 2021 QLED Color Gamut DCI-P3 Picture

DCI P3 xy 
 

97.32%
91.53%

DCI P3 uv 
 

98.71%
96.50%

Color Gamut Rec.2020 Picture  

LG CX OLED Color Gamut Rec.2020 Picture
TCL 6 Series/R646 2021 QLED Color Gamut Rec.2020 Picture

Rec 2020 xy 
 

71.67%
69.61%

Rec 2020 uv 
 

75.65%
74.75%

Show text

Color Volume 
 

7.1
7.9

P3 Color Volume ITP Picture  

LG CX OLED P3 Color Volume ITP Picture
TCL 6 Series/R646 2021 QLED P3 Color Volume ITP Picture

1,000 cd/m² DCI P3 Coverage ITP 
 

44.2%
75.4%

2020 Color Volume ITP Picture  

LG CX OLED 2020 Color Volume ITP Picture
TCL 6 Series/R646 2021 QLED 2020 Color Volume ITP Picture

10,000 cd/m² Rec 2020 Coverage ITP 
 

33.5%
34.5%

White Luminance 
 

668 cd/m²

Red Luminance 
 

160 cd/m²

Green Luminance 
 

450 cd/m²

Blue Luminance 
 

54 cd/m²

Cyan Luminance 
 

501 cd/m²

Magenta Luminance 
 

207 cd/m²

Yellow Luminance 
 

616 cd/m²

Normalized DCI P3 Coverage ITP 
 

80.6%

Normalized Rec 2020 Coverage ITP 
 

61.0%

Show text

Local Dimming 
 

10

LD Video, Moving Object  

LD Video, Real Content  

LD Video, Real Content Side View  

Local Dimming 
 

No
Yes

Backlight 
 

No Backlight
Full-Array

Show text

Pre Calibration 
 

8.2
7.5

Pre White Balance Picture  

LG CX OLED Pre White Balance Picture
TCL 6 Series/R646 2021 QLED Pre White Balance Picture

Pre Gamma Curve Picture  

LG CX OLED Pre Gamma Curve Picture
TCL 6 Series/R646 2021 QLED Pre Gamma Curve Picture

Pre Color Picture  

LG CX OLED Pre Color Picture
TCL 6 Series/R646 2021 QLED Pre Color Picture

White Balance dE 
 

2.47
3.67

Color dE 
 

1.77
2.51

Gamma 
 

2.19
2.30

Color Temperature 
 

7,034 K
6,239 K

Picture Mode 
 

Expert (Dark Room)
Movie

Color Temp Setting 
 

Warm 2
Warm

Gamma Setting 
 

2.2
2.2

Show text

Post Calibration 
 

9.6
9.4

Post White Balance Picture  

LG CX OLED Post White Balance Picture
TCL 6 Series/R646 2021 QLED Post White Balance Picture

Post Gamma Curve Picture  

LG CX OLED Post Gamma Curve Picture
TCL 6 Series/R646 2021 QLED Post Gamma Curve Picture

Post Color Picture  

LG CX OLED Post Color Picture
TCL 6 Series/R646 2021 QLED Post Color Picture

White Balance dE 
 

0.16
0.26

Color dE 
 

1.00
1.46

Gamma 
 

2.20
2.20

Color Temperature 
 

6,512 K
6,512 K

White Balance Calibration 
 

22 point
20 point

Color Calibration 
 

Yes
No

Show text

Gray Uniformity 
 

8.5
7.8

50% Uniformity Picture  

LG CX OLED 50% Uniformity Picture
TCL 6 Series/R646 2021 QLED 50% Uniformity Picture

50% Std. Dev. 
 

1.526%
2.499%

50% DSE 
 

0.135%
0.165%

5% Uniformity Picture  

LG CX OLED 5% Uniformity Picture
TCL 6 Series/R646 2021 QLED 5% Uniformity Picture

5% Std. Dev. 
 

0.401%
0.983%

5% DSE 
 

0.106%
0.102%

Show text

Black Uniformity 
 

10
9.1

Black Uniformity Picture With Preferred Local Dimming  

LG CX OLED Black Uniformity Picture With Preferred Local Dimming
TCL 6 Series/R646 2021 QLED Black Uniformity Picture With Preferred Local Dimming

Std. Dev. 
 

N/A
0.471%

Native Black Uniformity Picture  

LG CX OLED Native Black Uniformity Picture
TCL 6 Series/R646 2021 QLED Native Black Uniformity Picture

Native Std. Dev. 
 

0.416%
1.143%

Show text

Viewing Angle 
 

8.4
5.4

Viewing Angle Video  

Chroma Graph  

LG CX OLED Chroma Graph
TCL 6 Series/R646 2021 QLED Chroma Graph

Color Washout 
 

48°
25°

Hue Graph  

LG CX OLED Hue Graph
TCL 6 Series/R646 2021 QLED Hue Graph

Color Shift 
 

32°
33°

Lightness Graph  

LG CX OLED Lightness Graph
TCL 6 Series/R646 2021 QLED Lightness Graph

Brightness Loss 
 

62°
30°

Black Level Raise 
 

70°
13°

Gamma Shift 
 

57°
21°

Show text

Reflections 
 

9.3
8.5

Reflections Picture  

LG CX OLED Reflections Picture
TCL 6 Series/R646 2021 QLED Reflections Picture

Average Room Off Picture  

LG CX OLED Average Room Off Picture
TCL 6 Series/R646 2021 QLED Average Room Off Picture

Bright Room Off Picture  

LG CX OLED Bright Room Off Picture
TCL 6 Series/R646 2021 QLED Bright Room Off Picture

Screen Finish 
 

Glossy
Semi-gloss

Total Reflections 
 

1.5%
3.1%

Indirect Reflections 
 

0.4%
0.6%

Calculated Direct Reflections 
 

1.1%
2.5%

Show text

Local Dimming In Game Mode 
 

10

LD Video, Moving Object  

LD Video, Real Content  

LD Video, Real Content Side View  

Local Dimming 
 

No

Backlight 
 

No Backlight

Show text

HDR Native Gradient 
 

8.7
8.5

HDR Gradient Picture  

LG CX OLED HDR Gradient Picture
TCL 6 Series/R646 2021 QLED HDR Gradient Picture

100% Black to 50% Gray  

6.0

50% Gray to 100% White  

10

100% Black to 50% Red  

8.0

50% Red to 100% Red  

10

100% Black to 50% Green  

8.0

50% Green to 100% Green  

8.0

100% Black to 50% Blue  

8.0

50% Blue to 100% Blue  

10

Color Depth 
 

10 Bit

Red (Std. Dev.) 
 

0.083

Green (Std. Dev.) 
 

0.105

Blue (Std. Dev.) 
 

0.092

Gray (Std. Dev.) 
 

0.081

Show text

Low-Quality Content Smoothing 
 

8.1

Low-Quality Content Smoothing Picture  

TCL 6 Series/R646 2021 QLED Low-Quality Content Smoothing Picture

Smoothing 
 

9.0

Detail Preservation 
 

6.0

Show text

Upscaling: Sharpness Processing 
 

8.0
3.0

Sharpness Picture - 480p  

LG CX OLED Sharpness Picture - 480p
TCL 6 Series/R646 2021 QLED Sharpness Picture - 480p

Show text

Pixels 
 

Pixels Picture  

LG CX OLED Pixels Picture
TCL 6 Series/R646 2021 QLED Pixels Picture

Subpixel Layout 
 

BGR

Type  

OLED
LED

Sub-Type 
 

WOLED
VA

Show text

720p Input 
 

8.0

720p Picture  

LG CX OLED 720p Picture

Show text

1080p Input 
 

9.0

1080p Picture  

LG CX OLED 1080p Picture

Show text

4k Input 
 

10

4k Picture  

LG CX OLED 4k Picture

Show text

8k Input 
 

0.0

8k Picture  

LG CX OLED 8k Picture

Show text

Temporary Image Retention 
 

10

Image Retention Picture  

LG CX OLED Image Retention Picture

IR after 0 min recovery 
 

0.00%

IR after 2 min recovery 
 

0.00%

IR after 4 min recovery 
 

0.00%

IR after 6 min recovery 
 

0.00%

IR after 8 min recovery 
 

0.00%

IR after 10 min recovery 
 

0.00%

Show text

Permanent Burn-In Risk 
 

2.0

Permanent Burn-In Risk 
 

Yes

Show text

Motion

Response Time 
 

9.9
8.4

Motion Blur Picture  

LG CX OLED Motion Blur Picture
TCL 6 Series/R646 2021 QLED Motion Blur Picture

Response Time Chart  

LG CX OLED Response Time Chart
TCL 6 Series/R646 2021 QLED Response Time Chart

80% Response Time 
 

0.3 ms
3.9 ms

100% Response Time 
 

1.7 ms
11.1 ms

Show text

Flicker-Free 
 

10
9.9

Backlight chart 
 

LG CX OLED Backlight chart
TCL 6 Series/R646 2021 QLED Backlight chart

Flicker-Free 
 

No
No

PWM Dimming Frequency 
 

0 Hz
960 Hz

Show text

Black Frame Insertion (BFI) 
 

BFI Picture  

LG CX OLED BFI Picture
TCL 6 Series/R646 2021 QLED BFI Picture

BFI Frequency Picture  

LG CX OLED BFI Frequency Picture
TCL 6 Series/R646 2021 QLED BFI Frequency Picture

Optional BFI 
 

Yes
Yes

Min Flicker For 60 fps 
 

60 Hz
120 Hz

60Hz For 60 fps 
 

Yes
No

120Hz For 120 fps 
 

Yes
Yes

Min Flicker for 60 fps in Game Mode 
 

60 Hz
120 Hz

Show text

Motion Interpolation 
 

Motion Interpolation (30 fps) Picture  

LG CX OLED Motion Interpolation (30 fps) Picture
TCL 6 Series/R646 2021 QLED Motion Interpolation (30 fps) Picture

Motion Interpolation (30 fps) 
 

Yes
Yes

Motion Interpolation (60 fps) Picture  

LG CX OLED Motion Interpolation (60 fps) Picture
TCL 6 Series/R646 2021 QLED Motion Interpolation (60 fps) Picture

Motion Interpolation (60 fps) 
 

Yes
Yes

Show text

Stutter 
 

4.9
7.0

Frame Hold Time @ 24 fps 
 

39.9 ms
30.6 ms

Frame Hold Time @ 60 fps 
 

14.9 ms
5.6 ms

Show text

24p Judder 
 

10
10

Judder-Free 24p 
 

Yes
Yes

Judder-Free 24p via 60p 
 

Yes
Yes

Judder-Free 24p via 60i 
 

Yes
Yes

Judder-Free 24p via Native Apps 
 

Yes
Yes

Show text

Variable Refresh Rate 
 

9.4
7.7

Native Refresh Rate 
 

120 Hz
120 Hz

Variable Refresh Rate 
 

Yes
Yes

HDMI Forum VRR 
 

Yes
Yes

FreeSync 
 

Yes
Yes

G-SYNC Compatible 
 

Yes (NVIDIA Certified)
No

4k VRR Maximum 
 

120 Hz
120 Hz

4k VRR Minimum 
 

< 20 Hz
48 Hz

1080p VRR Maximum 
 

120 Hz
120 Hz

1080p VRR Minimum 
 

< 20 Hz
48 Hz

1440p VRR Maximum 
 

120 Hz
120 Hz

1440p VRR Minimum 
 

< 20 Hz
48 Hz

VRR + Local Dimming  

Yes

VRR Supported Connectors 
 

HDMI

Show text

Inputs

Input Lag 
 

9.5
9.4

1080p @ 60Hz 
 

13.6 ms
14.2 ms

1080p @ 60Hz Outside Game Mode 
 

97.0 ms
138.8 ms

1080p @ 120Hz 
 

6.9 ms
5.8 ms

1080p @ 144Hz 
 

N/A

1440p @ 60Hz 
 

13.8 ms
14.2 ms

1440p @ 120Hz 
 

6.9 ms
5.8 ms

1440p @ 144Hz 
 

N/A

4k @ 60Hz 
 

13.6 ms
14.4 ms

4k @ 60Hz + 10-Bit HDR 
 

13.5 ms
13.9 ms

4k @ 60Hz @ 4:4:4 
 

13.6 ms
14.2 ms

4k @ 60Hz Outside Game Mode 
 

97.0 ms
138.6 ms

4k @ 60Hz With Interpolation 
 

92.9 ms
131.9 ms

4k @ 120Hz 
 

6.7 ms
5.8 ms

4k @ 144Hz 
 

N/A

8k @ 60Hz 
 

N/A
N/A

1080p with Variable Refresh Rate 
 

5.9 ms

1440p with VRR 
 

6.2 ms

4k with VRR 
 

5.9 ms

8k with VRR 
 

N/A

Show text

Supported Resolutions 
 

9.6
9.3

Resolution  

4k
4k

480p @ 59.94Hz (Widescreen) 
 

Yes

720p @ 59.94Hz 
 

Yes

1080p @ 60Hz @ 4:4:4 
 

Yes
Yes

1080p @ 120Hz 
 

Yes (native support)
Yes

1080p @ 144Hz 
 

No

1440p @ 60Hz 
 

Yes (forced resolution required)
Yes (forced resolution required)

1440p @ 120Hz 
 

Yes (native support)
Yes

1440p @ 144Hz 
 

No

4k @ 60Hz 
 

Yes
Yes

4k @ 60Hz @ 4:4:4 
 

Yes
Yes

4k @ 120Hz 
 

Yes (native support)
Yes

4k @ 120Hz @ 4:4:4 
 

No

4k @ 144Hz 
 

No

8k @ 30Hz or 24Hz 
 

No
No

8k @ 60Hz 
 

No
No

Show text

PS5 Compatibility 
 

PS5 Screenshot  

LG CX OLED PS5 Screenshot
TCL 6 Series/R646 2021 QLED PS5 Screenshot

Auto Low Latency Mode (ALLM) 
 

Yes
Yes

4k @ 120Hz 
 

Yes
Yes

1440p @ 120Hz 
 

PS5 can't do 1440p
Yes

1080p @ 120Hz 
 

Yes
Yes

HDR 
 

Yes

Xbox Series X Screenshot  

LG CX OLED Xbox Series X Screenshot
TCL 6 Series/R646 2021 QLED Xbox Series X Screenshot

VRR 
 

PS5 can't do VRR yet
Yes

PS5, 4k @ 120Hz + HDR 
 

Yes

PS5, 4k @ 60Hz + HDR 
 

Yes

Xbox Series X, 4k @ 120Hz + HDR 
 

Yes

Xbox Series X, 4k @ 120Hz 
 

Yes
Yes

Xbox Series X, 4k @ 60Hz + HDR 
 

Yes

Xbox Series X, 1440p @ 120Hz 
 

Yes
Yes

Xbox Series X, 1080p @ 120Hz 
 

Yes
Yes

Xbox Series X, Variable Refresh Rate 
 

Yes
Yes

Show text

Xbox Series X|S Compatibility 
 

Xbox Series X Screenshot  

LG CX OLED Xbox Series X Screenshot
TCL 6 Series/R646 2021 QLED Xbox Series X Screenshot

Auto Low Latency Mode (ALLM) 
 

Yes

4k @ 120Hz 
 

Yes
Yes

1440p @ 120Hz 
 

Yes
Yes

1080p @ 120Hz 
 

Yes
Yes

HDR 
 

Yes

VRR 
 

Yes
Yes

Show text

Inputs Specifications  

HDR10 
 

Yes
Yes

HDR10+ 
 

No
Yes

Dolby Vision 
 

Yes
Yes

HLG 
 

Yes
Yes

HDMI 2.0 Full Bandwidth 
 

Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3,4)

HDMI 2.1 Class Bandwidth 
 

Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2)

CEC  

Yes
Yes

HDCP 2.2  

Yes (HDMI 1,2,3,4)
Yes (HDMI 1,2,3,4)

ATSC Tuner 
 

1.0

USB 3.0 
 

No
No

Variable Analog Audio Out  

Yes
Yes

Wi-Fi Support  

Yes (2.4 GHz, 5 GHz)
Yes (2.4 GHz, 5 GHz)

Show text

Input Photos  

Side Inputs Picture  

LG CX OLED Side Inputs Picture
TCL 6 Series/R646 2021 QLED Side Inputs Picture

Rear Inputs Picture  

LG CX OLED Rear Inputs Picture
TCL 6 Series/R646 2021 QLED Rear Inputs Picture

Total Inputs  

HDMI  

4
4

USB  

3
2

Digital Optical Audio Out  

1
1

Analog Audio Out 3.5mm  

1
1

Analog Audio Out RCA  

0
0

Component In  

0
0

Composite In  

1 (incl. adapter)
1 (adapter required, not incl.)

Tuner (Cable/Ant)  

1
1

Ethernet  

1
1

DisplayPort  

0
0

IR In  

0
0

SD/SDHC  

0

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Audio Passthrough 
 

ARC/eARC Port 
 

Yes
eARC

eARC: Dolby Atmos Over Dolby Digital Plus 
 

Yes
Yes

eARC: Dolby Digital Plus 7.1 
 

Yes

eARC: LPCM 7.1 Over Dolby MAT 
 

Yes

eARC: Dolby TrueHD 7.1 
 

Yes

ARC 
 

Yes (HDMI 2)

eARC: DTS:X Over DTS-HD MA 
 

No
Yes

eARC: DTS-HD Master Audio 7.1 
 

Yes

eARC: LPCM Channels (Bitstream) 
 

2.0

ARC: Dolby Digital 5.1 
 

Yes
Yes

ARC: DTS 5.1 
 

No
Yes

Optical: Dolby Digital 5.1 
 

Yes
Yes

Optical: DTS 5.1 
 

No
Yes

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Sound Quality

Frequency Response 
 

7.6
7.4

Frequency Response  

See details on graph tool
See details on graph tool

Low-Frequency Extension 
 

63.50 Hz
80.00 Hz

Std. Dev. @ 70 
 

2.12 dB
4.97 dB

Std. Dev. @ 80 
 

2.12 dB
4.80 dB

Std. Dev. @ Max 
 

5.18 dB
4.39 dB

Max 
 

91.2 dB SPL
95.1 dB SPL

Dynamic Range Compression 
 

5.62 dB
1.87 dB

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Distortion 
 

7.0
8.2

Total Harmonic Distortion 
 

See details on graph tool
See details on graph tool

Weighted THD @ 80 
 

0.085
0.032

Weighted THD @ Max 
 

0.519
0.385

IMD @ 80 
 

2.00%
0.45%

IMD @ Max 
 

10.89%
1.23%

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Smart Features

Interface 
 

8.5
8.0

Smart TV Picture  

LG CX OLED Smart TV Picture
TCL 6 Series/R646 2021 QLED Smart TV Picture

Smart OS  

webOS
Google TV

Version  

5.0
11

Ease of Use 
 

Easy
Average

Smoothness 
 

Average
Very Smooth

Time Taken to Select YouTube 
 

2 s
2 s

Time Taken to Change Backlight 
 

7 s
2 s

Advanced Options 
 

Many
Many

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Ad-Free 
 

0.0
0.0

Ads Picture  

LG CX OLED Ads Picture
TCL 6 Series/R646 2021 QLED Ads Picture

Ads 
 

Yes
Yes

Opt-out 
 

No
No

Suggested Content in Home 
 

Yes
Yes

Opt-out of Suggested Content 
 

No
No

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Apps and Features 
 

8.0
9.0

Apps Picture  

LG CX OLED Apps Picture
TCL 6 Series/R646 2021 QLED Apps Picture

App Selection 
 

Great
Great

App Smoothness 
 

Average
Very Smooth

Cast Capable 
 

Yes
Yes

USB Drive Playback 
 

Yes
Yes

USB Drive HDR Playback 
 

Yes
Yes

HDR in Netflix 
 

Yes
Yes

HDR in YouTube 
 

Yes
Yes

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Remote 
 

9.0
7.0

Remote Picture  

LG CX OLED Remote Picture
TCL 6 Series/R646 2021 QLED Remote Picture

Size 
 

Large
Small

Voice Control 
 

Many Features
Many Features

CEC Menu Control 
 

Yes
Yes

Other Smart Features 
 

Yes
No

Remote App  

LG TV Plus
Android TV

Show text

TV Controls  

Controls Picture  

LG CX OLED Controls Picture
TCL 6 Series/R646 2021 QLED Controls Picture

Show text

In The Box  

In The Box Picture  

LG CX OLED In The Box Picture
TCL 6 Series/R646 2021 QLED In The Box Picture

Show text

Misc  

Power Consumption  

75 W
54 W

Power Consumption (Max)  

178 W
154 W

Firmware  

03.00.45
V8-T615T02-LF1V023

LG CX OLED

TCL 6 Series/R646 2021 QLED

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