When comparing Sony X720E (KD43X720E) vs TCL S405 (49S405), the Slant community recommends TCL S405 (49S405) for most people. In the question“What are the best 4K TVs to use as a computer monitor?” TCL S405 (49S405) is ranked 1st while Sony X720E (KD43X720E) is ranked 2nd. The most important reason people chose TCL S405 (49S405) is:
This 4K TV has everything a good computer monitor needs. It has small input lag, barely noticeable motion blur, decent color accuracy, and full 4:4:4 color support. As for responsiveness, the TCL S405 is the fastest TV in its price range because of its small input lag of only 14.9 ms. Furthermore, the full pixel response time of the TCL S405 is 14.4 ms which means that the TV’s pixels can entirely change their colors in 14.4 ms - ten times faster than an average blink. Because of that, fast-moving objects don’t leave trails, so the TV does not suffer from any noticeable motion blur.
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Pro Makes an excellent computer monitor
The Sony X720E makes an excellent computer monitor because of the TV’s short input lag, full 4:4:4 color support, and well-handled motion blur.
The TV has enough processing power to keep its input lag and response time to a bare minimum. Its input lag is 19.7 ms, which ensures that it takes less than 1/50th of a second for the X720E to process an input signal generated by, let's say, a click of a button and display a corresponding image change. Furthermore, the X720E is a very responsive TV. It takes only 7.5 ms for its pixels to switch 80% to the next color; As a result, fast-moving objects don’t leave long trails on a screen which almost cancels out all the motion blur effects.
The full 4:4:4 color support allows the X720E to process native computer-generated video input. As a result, the TV can display sharp and crisp image, without any detail loss. This is especially noticeable while viewing vector graphics such as text.
Pro Great for bright rooms
The combination of reasonably high peak brightness and semi-gloss screen finish allows this TV to deal with reflections and glare efficiently. Its 340 nits of brightness are almost double than what its direct competitor, the TCL S405, offers. Furthermore, the X720E diffuses up to 97.6% of ambient light; thus the TV does not suffer from reflections.
Pro Excellent for console gaming
The Sony X720E is a great companion to latest gen consoles, like the Xbox One X, PS4 Pro, and Wii U because of its 4K60 support, low input lag, and motion blur candling capabilities.
Furthermore, the TV’s full HDR support allows you to fully experience HDR-enhanced games such as World of Tanks, FIFA 18, etc.
Pro Excellent for upscaling content
This TV does a fantastic job when it comes to upscaling low-resolution content. In a nutshell, it can upscale 480p, 720p, and 1080p content to 4K resolution while preserving details and sharp edges. Great for those with a collection of old DVDs or Blu-ray disks.
Pro Ads-free main interface
The main interface of the smart OS does not feature advertisements or sponsored content.
Pro Well-rounded inputs
Regarding connectivity, this TV is has everything you'd currently want. It has three HDCP 2.2 compliant HDMI 2.0 ports, digital and analog audio output ports, and an Ethernet port. Additionally, as the TV has a composite input interface, you can enjoy playing your retro consoles, such as the Nintendo and Sega without having to go through the hassle of signal conversion. HDMI, USB, and analog coaxial ports are situated on the side of the TV so you won’t have any problem accessing them even if it’s mounted on a wall.
Pro No problems with image retention
Unlike the majority of OLED panels, this LED TV does not suffer from image retention problems. You can leave the TV on for long periods without having to worry about pixel damage.
Pro Suitable for viewing up-front
The reasonably small panel size of 43-inch means you can still be comfortable looking at the screen up close. You can conveniently use this TV as a computer monitor and sit as close as 2.2 feet away from it.
Pro The stand does not take up too much space
The 43-inch model of Sony X720E does not take up too much space on a work desk as the TV comes with a compact, 9.4-inch by 21.9-inch stand. In comparison, the TCL S405 takes up almost 30% more table space.
Pro Excellent viewing angles
The X720E has excellent viewing angles because of its IPS panel, which gives you greater freedom than VA panels when it comes to finding a good viewing spot. In fact, you will only notice a minor color shift if your viewing angle is greater than 41 degrees.
Pro Works well as a computer monitor
This 4K TV has everything a good computer monitor needs. It has small input lag, barely noticeable motion blur, decent color accuracy, and full 4:4:4 color support.
As for responsiveness, the TCL S405 is the fastest TV in its price range because of its small input lag of only 14.9 ms.
Furthermore, the full pixel response time of the TCL S405 is 14.4 ms which means that the TV’s pixels can entirely change their colors in 14.4 ms - ten times faster than an average blink. Because of that, fast-moving objects don’t leave trails, so the TV does not suffer from any noticeable motion blur.
Pro Reasonable picture quality
The S405's VA panel has a reasonably high native contrast ratio of 4171:1, acceptable grey uniformity, excellent black uniformity, and good color accuracy.
Pro Excellent value for money
Priced below $350 , this 4K TV has enough functionality to compete against more expensive competitors. You’d be hard pressed to find a similar TV in this price range with a better picture quality and broader feature set.
Pro Good for sports
The TCL S405 is an excellent solution for those who like to watch highly dynamic content, such as sports because the TV does not suffer from noticeable motion blur effect. As the TV's pixels need only 6.3 ms to change their color 80% through; fast-moving objects don't leave visible trails on the screen. As a result, the motion blur effect is eliminated.
Pro Intuitive user interface
The S405 runs the Roku TV smart OS platform. It has broad app selection and is noticeably simpler to navigate than the Android TV, WebOS, and Tizen.
Pro Can be used up-front
Because of its reasonably small panel size and small minimum viewing distance of 2.2 ft, you can place the 43-inch model of the TCL S405 on top of your work desk and use it as a computer monitor.
Pro Displays colors accurately
Out of the box, the TLC S405 does an excellent job of color reproduction. In fact, you probably won’t even need to calibrate it.
Pro Ads-free interface
The main interface of this TV does not have advertisements. It even has a function to limit ads even in third-party applications.
Pro Good for gaming
Its well-handled motion blur, full HDR support, and low SDR and HDR input lag make it a great choice for gaming. The TCL S405 also works well with new-gen consoles like the Xbox One X and PS4 Pro because of the TV’s native 4K60 refresh rate.
Con Can’t unleash full potential of HDR content
Even though this TV does support HDR10 media, the low HDR peak brightness, poor native contrast, lack of local dimming, and lack of wide color gamut severely limit the quality of HDR playback. Even some lower tier TVs will produce higher quality HDR images.
Con Not compatible with Dolby Vision
When it comes to HDR content, the X720E cannot display Dolby Vision-compliant content as it is only limited to HDR10 content. Even though HDR10 has more available content, multiple services require Dolby Vision for HDR playback.
Con Built-in speakers don’t sound right
The X720E comes with an integrated 20W 2.0 stereo speaker system. While it can get pretty loud (around 100 dB), the quality of sound is very weak, especially when it comes to bass. The speakers sound unclear and muddy.
Con Dark scenes look shallow
Because of the really low native contrast ratio of 907:1, dark scenes look washed out if the TV is placed in a dark environment.
Con Not suitable for competitive gaming
While the TV's input lag of 19.7 ms is noticeably smaller than the overwhelming majority of TVs on the market, it still can not compete with rapid TN gaming monitors when it comes to fast and competitive gaming. The input lag of such panels can go all the way down to 3 ms.
Con Requires an external power brick
Both the 43-inch and 49-inch models of the Sony X720E have large and bulky external power bricks. Bulky PSUs can be a hassle to deal with especially if you’re mounting your TV on a wall.
Con Non-intuitive smart OS
Unlike other Sony TVs, the X720E has a custom, Linux based operating system which runs the Opera TV application store. OS is unintuitive and confusing to use.
Con Narrow viewing angles
Due to its limited viewing angles, the TCL S405 looks good only when you sit right in front of it. This viewing angle limitation is very common among VA panels, making such TVs not suitable for group watching.
Con Not all HDR formats are supported
This TV is compatible with HDR10, but not with Dolby Vision content. While HDR10 has more content, Dolby is aggressively pushing Dolby Vision towards content makers.
Con Not suitable for bright rooms
This TV is not bright enough to fight glare when placed in a luminous environment.
Con Poor sound quality
The stereo speaker system sounds horrible and cannot get louder than 91 dB. Adding a relatively cheap speaker system or a soundbar will make a huge difference.
Con Remote lacks functionality
The TCL S405's remote is very basic and has limited functionality. It can only be used for navigation and sound level control, which is not that much since many modern TV remotes have advanced functions.