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LeEco Super4 TV Review

Tested using Methodology v1.2
Updated Mar 03, 2017 at 08:49 am
LeEco Super4 Picture
Test Methodology v1.2
7.2
Mixed Usage
Value for price beaten by
: Not at the latest test bench
6.5
Movies
7.5
TV Shows
7.1
Sports
7.6
Video Games
6.8
HDR Movies
7.5
HDR Gaming
6.7
PC Monitor
Type LED
Sub-Type
VA
Resolution 4k

The LeEco Super4 is a 4k LED TV. It has above average picture quality and will be best suited in a darker environment. Unfortunately, the picture quality degrades when viewed from a slight angle. On the upside, both motion and input lag will suit most people's needs and the aluminium frame has great build quality. It is also known by the model codes L434UCNN, L554UCNN and L654UCNN depending on the size.

Our Verdict

7.2 Mixed Usage

Decent TV for mixed usage. It has a very narrow viewing angle but picture quality is above average thanks to its very good contrast ratio. The TV will perform best when used in a darker environment since it's maximum brightness is not very high.

See our Mixed Usage recommendations
6.5 Movies

Average for watching movies in a dark room. Blacks are deep and uniform, but the TV lacks any local dimming feature to enhance them even further.

See our Movies recommendations
7.5 TV Shows

Passable set for watching TV in a brighter environment. Narrow viewing angles deteriorate the picture quality at even a slight angle. Acceptable amount of reflections, but the TV doesn't get bright enough to counter-act brighter environments.

See our TV Shows recommendations
7.1 Sports

Slightly above average for watching sports. Mediocre gray uniformity and poor viewing angle cause even colored fields to look blotchy and change color at the slightest angle change.

See our Sports recommendations
7.6 Video Games

Good TV for gaming. Moderate amount of input lag and little motion blur, so everything feels fluid and snappy.

See our Video Games recommendations
6.8 HDR Movies

Decent TV for HDR Movies. Because of its low peak brightness, HDR content will not have much of a visual effect. It does have a wide color gamut which is good.

See our HDR Movies recommendations
7.5 HDR Gaming

Very good for HDR gaming. 4k input lag is not affected by having an HDR input. Peak brightness is limited, however, so the visual effect will not be the most impactful.

See our HDR Gaming recommendations
6.7 PC Monitor

Poor PC monitor. No chroma 4:4:4 support and narrow viewing angles make this TV a bad choice for a PC monitor.

See our PC Monitor recommendations
  • 7.2 Mixed Usage
  • 6.5 Movies
  • 7.5 TV Shows
  • 7.1 Sports
  • 7.6 Video Games
  • 6.8 HDR Movies
  • 7.5 HDR Gaming
  • 6.7 PC Monitor
Pros
  • Excellent contrast ratio
  • Fully featured and snappy smart platform
Cons
  • Very narrow viewing angle
  • Peak brightness is below average
  1. Update 3/12/2018: Converted to Test Bench 1.2. Learn more about our versioned test bench system here.
  2. Update 8/10/2017: Converted to Test Bench 1.1. Learn more about our new versioned test bench system here.

Check Price

43" L434UCNN
Unavailable
B&H
55" L554UCNN
Unavailable
B&H
65" L654UCNN
Unavailable
B&H

Test Results

Design
8.5
Design
Style
Curved No

The design of the Super4 is great, and the TV feels high quality. The wide stand provides good support but requires a very wide table. The build quality is great, and the aluminium frame is nice.

Design
Stand

The L554UCNN has the widest stand of a 55" TV we have seen. The legs support the TV well and are made of aluminum.

Footprint of the 55" TV stand: 10.6" x 47.8"

Design
Back
Wall Mount VESA 400x200

The rear of the TV is quite simple. The top half is brushed aluminum, with visible screws holding the back together firmly. At the middle-top of the TV is a USB socket for webcam support. The cables are still easy to access if mounted to a wall.

Design
Borders
Borders 0.55" (1.4 cm)

The borders are thinner than average and look very good. They feel quality with a machined aluminum edge.

Design
Thickness
Max Thickness 1.46" (3.7 cm)

The Super 4 is one of the thinnest TVs we have reviewed, and looks sleek from the side.

Design
Temperature
Maximum Temperature
115 °F (46 °C)
Average Temperature
97 °F (36 °C)

The bottom of the TV gets noticeably warm to the touch after it has been on a long time, however this shouldn't be a problem during normal use. The backlight appears to be edge lit from the bottom as that is where it is hottest. The bottom is lined with vents to help keep it cool.

8.0
Design
Build Quality

The build quality of the X55 is great. Torx screws on the back allow easily access to the internals if required, and all the machining feels high quality.

Picture Quality
9.3
Picture Quality
Contrast
Native Contrast
6693 : 1
Contrast with local dimming
N/A

The contrast ratio is excellent for this LeEco TV. When set to our calibration goal of 100 cd/m², blacks are very deep and will provide a good movie experience, especially when placed in a dark room.

0
Picture Quality
Local Dimming
Local Dimming
No
Backlight
Edge

There is no local dimming feature on the LeEco Super4 TV. The video is for reference only.

7.4
Picture Quality
SDR Peak Brightness
SDR Real Scene Peak Brightness
279 cd/m²
SDR Peak 2% Window
316 cd/m²
SDR Peak 10% Window
314 cd/m²
SDR Peak 25% Window
308 cd/m²
SDR Peak 50% Window
312 cd/m²
SDR Peak 100% Window
310 cd/m²
SDR Sustained 2% Window
312 cd/m²
SDR Sustained 10% Window
305 cd/m²
SDR Sustained 25% Window
307 cd/m²
SDR Sustained 50% Window
307 cd/m²
SDR Sustained 100% Window
304 cd/m²
SDR ABL
0.002

Decent SDR peak brightness. The TV remains a constant ~300 cd/m² regardless of the content shown, which is good. This is bright enough for a moderately lit room, but in a bright room the TV may appear too dim.

6.1
Picture Quality
HDR Peak Brightness
HDR Real Scene Peak Brightness
284 cd/m²
HDR Peak 2% Window
331 cd/m²
HDR Peak 10% Window
329 cd/m²
HDR Peak 25% Window
328 cd/m²
HDR Peak 50% Window
329 cd/m²
HDR Peak 100% Window
330 cd/m²
HDR Sustained 2% Window
331 cd/m²
HDR Sustained 10% Window
329 cd/m²
HDR Sustained 25% Window
328 cd/m²
HDR Sustained 50% Window
329 cd/m²
HDR Sustained 100% Window
330 cd/m²
HDR ABL
0.001

Mediocre HDR peak brightness. While the measurements are nearly identical to the SDR brightness, HDR content features 1000-4000 cd/m² highlights, so a brighter TV is required to get the best experience. While this TV can't come close to producing the full brightness of those highlights, most of the scene in HDR content is below 200 cd/m², so the brightness of this TV is still passable for watching HDR.

6.7
Picture Quality
Gray Uniformity
50% Std. Dev.
2.568 %
50% DSE
0.212 %
5% Std. Dev.
2.703 %
5% DSE
0.128 %

The gray uniformity of this LeEco is average. The top half of the screen is a bit darker than the bottom, and two large dark vertical bands also go from the top to the bottom. The bottom edge of the screen also seems a bit brighter than the rest of the TV.

On the 5% gray uniformity picture, you can see more easily that the bottom edge is brighter than the rest of the screen. You can also see that both right and left sides seem to be more bright, but this is due to the relatively narrow viewing angle of this TV.

4.1
Picture Quality
Viewing Angle
Color Shift
16 °
Brightness
32 °
Black Level
8 °

The viewing angle of the Super4 is bad. Its picture quality worsens rapidly at an angle, even for a VA TV. Blacks become grayer and colors change after only a small angle, although the brightness change is not as bad.

7.1
Picture Quality
Black Uniformity
Native Std. Dev.
1.243 %
Std. Dev. w/ L.D.
N/A

The black uniformity of this LeEco TV is ordinary. Some clouding can be seen in the bottom of the screen where the edge backlight is situated, but this is mostly visible while displaying our black uniformity test pattern. When watching regular TV content, almost no clouding can be seen.

7.9
Picture Quality
Reflections
Screen Finish
Semi-gloss
Total Reflections
5.1 %
Indirect Reflections
0.6 %

The TV is quite good at handling reflections. For an average room it works well, but for a very bright living room it may be an issue. It has a semi-gloss finish which works to diffuse light directly on the screen.

7.9
Picture Quality
Pre Calibration
Picture Mode
Movie
White Balance dE
3.30
Color dE
2.14
Gamma
2.20
Color Temperature
6418 K

The pre-calibration color accuracy is good on this LeEco TV. The white balance is a bit high, though, but not as bad as seen on other budget TV. The gamma is not flat, but it still has an overall value of 2.2, which is still good. Finally, the color reproduction out of the box is not bad, and overall, for most people, this TV could be used as is, out of the box when set to the right picture mode.

9.4
Picture Quality
Post Calibration
Picture Mode
Movie
White Balance dE
0.19
Color dE
1.52
Gamma
2.20
Color Temperature
6503 K

The post-calibration color accuracy is excellent, and the calibration process was fast and easy to do. The TV as a 2 points and 10 points white balance calibration. Both were responsive and provided good enough control to make it a simple process. Even though it does not have a more advanced 'Color Management Systems', we ended up with a pretty accurate calibration.

You can see our recommended settings here.

7.5
Picture Quality
480p Input

The 480p upscaling of the Super4 is very aggressive with noise reduction, resulting in a very soft image. It still looks quite good though.

8.0
Picture Quality
720p Input

Upscaling of 720p content such as cable is good. Detail is preserved and few issues can be seen.

9.0
Picture Quality
1080p Input

Higher quality content such as Blu-rays are very clear.

10
Picture Quality
4k Input

Content at the native resolution of 4k such as UHD Blu-rays looks great. No issues can be seen.

8.1
Picture Quality
Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
88.08 %
DCI P3 uv
93.41 %
Rec 2020 xy
65.87 %
Rec 2020 uv
75.13 %

The Super4 can display a wide color gamut, so deep colors in HDR content will be shown properly. However there is a problem with the tone mapping of very bright highly saturated colors, they sometimes clip and become a totally different color. This is shown in this color gamut test done at a higher brightness, the extreme blue point turns orange. Because of this we performed the color gamut testing at a less bright stimulus value of 70 rather than our usual 75, though this should not affect the scores very much relative to other TVs.

Update 05/08/2017: The color gamut has been remeasured with the newest firmware update. The tone mapping has changed slightly (and the clipping error still exists) but the results remain about the same.

7.0
Picture Quality
Color Volume
Normalized DCI P3 Coverage ITP
78.5 %
10,000 cd/m² DCI P3 Coverage ITP
32.7 %
Normalized Rec 2020 Coverage ITP
60.8 %
10,000 cd/m² Rec 2020 Coverage ITP
25.2 %

This TV has a decent DCI P3 color volume, so HDR colors will be properly represented at various brightness levels. The TV's high contrast ratio allows it to show very dark colors better than most TVs. However this TV has poor Rec 2020 color volume so HDR content that uses the Rec 2020 color space will not have accurate deep color.

Update 05/08/2017: The Super4 has been tested with the newest firmware update and the color volume remains about the same.

7.8
Picture Quality
Gradient
Color Depth
10 Bit
Red (Std. Dev.)
0.093 dE
Green (Std. Dev.)
0.125 dE
Blue (Std. Dev.)
0.095 dE
Gray (Std. Dev.)
0.155 dE

Overall, the Super4 TV can display our gradient test pattern pretty smoothly. There are only some imperfections in the dark greens and in the darker grayscale portion, which is not bad.

10
Picture Quality
Temporary Image Retention
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 %

This TV does not present any image retention at all. Even right after the 10 minutes burn-in scene, no remnant of the static logo could be seen. This is in line with other VA TVs, which are usually retention-free.

10
Picture Quality
Permanent Burn-In Risk
Permanent Burn-In Risk
No

We don't expect VA panels to experience permanent image retention, as the VA panel in our long-term test appears immune.

Picture Quality
Pixels
Motion
8.0
Motion
Response Time
80% Response Time
6.3 ms
100% Response Time
17.4 ms

Motion blur is great. The response time is quick, resulting in only a short trail following moving objects. Transitions to the 20% level take longer than the other transitions, but this is unlikely to be an issue.

4.7
Motion
Flicker-Free
Flicker-Free
No
PWM Dimming Frequency
180 Hz

The Super4 uses PWM at 180Hz to dim the backlight, starting at 99/100 backlight setting. Lowering the setting shortens the duty cycle, while amplitude lowers slightly. Backlight PWM helps clear up motion slightly, but results in duplications following moving objects. We haven't seen any other TVs with a frequency of 180Hz, but it provides good performance at an even multiple of the 60Hz frame rate but high enough not to be noticeable for most people.

4.6
Motion
Black Frame Insertion (BFI)
Optional BFI
No
Min Flicker for 60 fps
180 Hz
60 Hz for 60 fps
No
120 Hz for 120 fps
N/A
Min Flicker for 60 fps in Game Mode
180 Hz

The LeEco has no options to reduce its flicker frequency, although its 180 Hz PWM backlight does help somewhat to make motion clearer.

7.0
Motion
Motion Interpolation
Motion Interpolation (30 fps)
Yes
Motion Interpolation (60 fps)
No

The Super 4 has a 60Hz panel, and can interpolate lower refresh rate content.

8.1
Motion
Stutter
Frame Hold Time @ 24 fps
24.3 ms
Frame Hold Time @ 60 fps
0.0 ms

The LeEco Super4 is great at displaying content without stutter. Although the response time is quick, it helps to blur the transition between frames to reduce stutter. It may be noticeable for movies (especially for slow panning shows) but isn't an issue for sports.

0
Motion
24p Judder
Judder-Free 24p
No
Judder-Free 24p via 60p
No
Judder-Free 24p via 60i
No
Judder-Free 24p via Native Apps
No

The LeEco Super4 TV is not able to display movies without judder under any of the tested frame rates, unfortunately. Movies playing from a 24p source like a Blu-rays player or a native streaming app, and from 60p sources like cable box all suffer from judder. Note that few peoples can notice judder, though, so this is more important for people that are sensitive to it.

0
Motion
Variable Refresh Rate
Native Refresh Rate
60 Hz
Variable Refresh Rate
No
4k VRR Maximum
N/A
4k VRR Minimum
N/A
1080p VRR Maximum
N/A
1080p VRR Minimum
N/A
VRR Supported Connectors
N/A

The Super4 doesn't support variable refresh rate (FreeSync or G-Sync) and has a 60Hz panel.

Inputs
7.9
Inputs
Input Lag
1080p @ 60Hz
35.3 ms
1080p @ 60Hz + HDR
55.4 ms
1080p @ 60Hz Outside Game Mode
102.2 ms
1080p @ 120Hz
N/A
4k @ 60Hz
35.5 ms
4k @ 60Hz + HDR
35.8 ms
4k @ 60Hz @ 4:4:4
N/A
4k @ 60Hz @ 4:4:4 + 8 bit HDR
N/A
4k @ 60Hz Outside Game Mode
106.3 ms
4k With Interpolation
135.6 ms
4k @ 120 Hz
N/A
4k with Variable Refresh Rate
N/A
1080p with Variable Refresh Rate
N/A

When in game mode the input lag is lower than average and should be good enough for all but the most competitive gamers. All three HDMI ports have the same input lag. The input lag varies by +/- 5 ms every time the TV switches to and from the HDMI input.

Note that when the TV switches to HDR mode it retains the settings from the previous mode it was in, so when gaming in HDR be sure you are in game mode before playing HDR content as you will not be able to switch into game mode once HDR mode is activated.

1.7
Inputs
Supported Resolutions
1080p @ 60Hz @ 4:4:4
No
1080p @ 120Hz
No
1440p @ 60Hz
No
4k @ 30Hz @ 4:4:4
No
4k @ 60Hz
Yes
4k @ 60Hz @ 4:4:4
No
4k @ 120Hz
No

Although the TV could accept 4:4:4 color as an input it did not display it properly. This test image shows how the TV was unable to show all the gaps between the lines for some color patterns. However this is only a concern when using the TV as a PC monitor while displaying text.

To play 4K @ 60 Hz the HDMI input in use needs to be set to 4K@60Hz Compatible in the TV's Input settings.

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

The TV also includes a PC input (VGA with 3.5mm AUX). One of the USB ports is located on the top of the TV for a webcam.

Inputs
Inputs Specifications
HDR10
Yes
Dolby Vision
No
HLG
No
3D
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 (HDMI 1,2,3)
HDMI 2.1 Full Bandwidth
No
ARC
Yes (HDMI 1)
USB 3.0
Yes (2)
HDCP 2.2 Yes (HDMI 1,2,3)
CEC Yes
MHL Yes (HDMI 3)
Variable Analog Audio Out Yes
Wi-Fi Support Yes (2.4 GHz, 5 GHz)

All three HDMI inputs support HDR and HDMI 2.0 at full bandwidth which is good when using multiple HDR capable devices.

Sound Quality
6.2
Sound Quality
Frequency Response
Low-Frequency Extension
142.54 Hz
Std. Dev. @ 70
5.51 dB
Std. Dev. @ 80
5.53 dB
Std. Dev. @ Max
5.35 dB
Max
92.3 dB SPL
Dynamic Range Compression
0.93 dB

Poor frequency response. The Super4 produces very little bass and doesn't get very loud either. The low-end cut-off of 180Hz and maximum volume of 85.5dB SPL are both quite poor, even for a TV. On the plus side, there doesn't seem to be much compression and pumping happening even under maximum load.

7.3
Sound Quality
Distortion
Weighted THD @ 80
0.039
Weighted THD @ Max
0.316
IMD @ 80
3.07 %
IMD @ Max