When comparing Samsung KS9000 vs TCL S405 55" (55S405), the Slant community recommends TCL S405 55" (55S405) for most people. In the question“What are the best 4K TVs to use as a computer monitor?” TCL S405 55" (55S405) is ranked 1st while Samsung KS9000 is ranked 4th. The most important reason people chose TCL S405 55" (55S405) is:
The S405 strikes a nice balance between picture quality, screen size, and input lag, all for an affordable price of below $500. It's a great choice for watching and gaming casually without breaking the bank. Compared to its direct competitors, it offers decent picture quality that is a tad below them, bigger screen size, and lower input lag. Content looks decent enough for most casual viewers - the black levels are sufficiently deep, colors are vivid, and it gets bright enough for most types of content in a dark room. The size difference is pretty huge as options with similar size of 49", or even smaller, cost fairly more than the S405. Its low input lag of ~15ms contributes to a more responsive gaming experience. It's barely noticeable, and it’s also one of the lowest among 4K TVs, which is an impressive feat in this price bracket.
Ranked in these QuestionsQuestion Ranking
Pro Amazing for gaming
This is one of the best screens that can be used for gaming as this 4K TV manages to deliver absolutely excellent motion control with no noticeable motion blur problems. Input lag measures around 20 ms in FullHD, 4K or 4K+HDR modes. This means that the action on the screen will not be blurred out nor will it lag behind the actual input from the buttons that you pressed on the controller or keyboard.
Pro Spectacular picture quality
KS9000 screen quality and combination of black levels, contrast and color saturation is one of the best you can get from an LCD TV. Colors are true to life and very vivid. Bright and dark areas of the screen are excellent and even the slightest details are noticeable. Combining all this - movies and video games will look outstanding, especially HDR ones.
Pro Excellent movie playback and motion interpolation
Movie watchers will be pleased by how it excellently handles 24 fps movies and delivers judder-free playback due to its 120Hz screen. Motion interpolation also works even on a 60fps signal, if it is needed. Pixel response time is 16ms, resulting in almost no motion blur in fast paced scenes.
Pro Pleasant to the eye
The bezel of this TV is only 1 cm thin and has a premium polished metal finish. It's stand has a chrome finish. The back of the TV is well-designed and has a premium finish with no visible inputs or ventilation holes.
Pro Respectable frequency response
Frequency cut-off is respectable for a TV. The low end gets cut off at only 71Hz and there is no significant drop on high tones.
Pro Speakers suitable for small rooms
The TV can get loud if needed, but it is only good enough for a small room, as the maximum volume reaches 87dB and there is no significant distortion noticeable at high volumes.
Pro Sharp, clear text in PC mode
Chroma 4:4:4 input is recognized in PC mode, so text will look sharp and clear.
Pro Above average colors
The TV uses a 10-bit panel and HDR processing, meaning it can produce 64 times more color than an 8-bit ordinary panel and covers 97% off color space range used in movie industry standards.
Pro No issues when used on sunlit rooms
The TV can produce more than 500 nits of overall brightness, so the picture can be bright even in bright, sunlit rooms, as well as can produce a short term localized brightness of more than 1000 nits letting HDR content look stunning. The glossy TV screen doesn’t have harsh reflections or purple tinting in dark areas,
Pro Very good for dark scenes and environments
The black color is deep, even and does not seem grey or bluish, resulting in wonderful dark scenes and excellent picture quality in a dark environment. Only OLED TVs can provide a better result.
Pro Excellent contrast ratio
It has a contrast ratio of 6800:1 which is excellent for a LCD TV and results in a natural and dynamic picture with deep blacks and detailed bright scenes.
Pro Sleek design
The TV’s design is sleek and modern, and should fit anywhere, even the back of the TV looks well designed.
Pro Easy to connect external devices
Samsung KS9000 has a small external box called OneConnect, that has all the HDMI and USB connections for the TV, making it easy to access them, as you do not need to reach for the back of the TV.
Pro Useful for professional work
The set supports chroma 4:4:4, meaning that small details or text displayed on the screen will remain accurate and undisturbed by the lack of color data. As the screen panel covers 97% of the color space range that is used by the film industry, it can be used as a monitor for accurate video or photo editing as well when properly calibrated.
Pro Excellent value for money
The S405 strikes a nice balance between picture quality, screen size, and input lag, all for an affordable price of below $500. It's a great choice for watching and gaming casually without breaking the bank.
Compared to its direct competitors, it offers decent picture quality that is a tad below them, bigger screen size, and lower input lag.
Content looks decent enough for most casual viewers - the black levels are sufficiently deep, colors are vivid, and it gets bright enough for most types of content in a dark room.
The size difference is pretty huge as options with similar size of 49", or even smaller, cost fairly more than the S405.
Its low input lag of ~15ms contributes to a more responsive gaming experience. It's barely noticeable, and it’s also one of the lowest among 4K TVs, which is an impressive feat in this price bracket.
Pro Decent for casual movies/TV watching
The S405 is a decent, affordable pick if you're a casual viewer. You'll get decent picture quality and a good 4K experience, but the HDR performance might be lacklustre due to the lack of local dimming, wide color gamut, and low HDR peak brightness.
Pro Works well as a computer monitor
The S405 works well as a computer monitor thanks to its low input lag, barely noticeable motion blur, and full 4:4:4 color support. The 43" model can even be used up close due to its small minimal viewing distance.
The low input lag and low motion blur of ~15ms makes it highly responsive to input and gives it the ability to handle dynamic content well.
It also has full 4:4:4 color support, so text or shapes with hard edges on the screen won't be blurry.
Pro Decent for watching sports
The S405 is a good pick for watching sports thanks to its low motion blur and reasonably consistent color uniformity.
Fast-moving objects, like footballs, won't leave any visible trails on the screen due to the low motion blur of ~15ms. While there are slight uniformity inconsistencies in the edges of the panel when displaying large, same-color objects on screen, like football fields, the issues generally go unnoticed by most.
Pro Intuitive & smooth user interface
The S405 runs on the Roku TV smart platform, touted for its simple, straightforward, and lag-free UI.
It’s easy for anyone to grasp how navigation works, thanks to its two-column design with the menu on the left and options on the right.
There’s also no noticeable lag during navigation or menu selection.
Pro Excellent for gaming
The S405 is excellent for gaming - the overall experience will be very responsive and fluid, thanks to the really low input lag and barely noticeable motion blur.
It has an input lag of ~15ms that makes the TV highly responsive to user input - gamers will have no issues keeping their actions in sync with what's on the display. The panel can fully change its pixels color in under 15ms, resulting in fast-moving objects not leaving any trails on the screen, eliminating virtually all motion blur.
It's also suitable for HDR gaming because there is no increased input lag for HDR, and it has full 4K suport @ 60 FPS, which makes it suitable for all new 4K games.
Pro Colors are easy to calibrate
Color calibration can be performed easily via the Roku mobile app. You won't have to fiddle with the remote trying to set the values correctly.
Pro Main interface has no ads
The S405 has no ads on its main interface, although there can be ads in third-party applications. Third-party ads can't be blocked, but the tracking and personalisation can be limited through the TV's settings.
Pro Highly versatile
The S405 is versatile enough to be used as a general-purpose display.
The picture quality is decent for movies and TV shows, and it checks all the boxes that makes a TV suitable for gaming, sports, and as a computer monitor: low input lag, low motion blur, good screen uniformity, and full 4:4:4 color support.
Pro Well-balanced side inputs
Even when the S405 is mounted on a wall, you'll still have access to all essential inputs and outputs which are situated on the side of the unit.
Pro Colors are accurate even without calibration
The S405 is excellent at reproducing colors accurately out of the box.
Even without calibration, the colors are spot-on - they're very close to what the source signal demands, and any inaccuracies are generally considered imperceptible to most end users.
The overall average difference between the source signal and the panel's reproduction of the color is measured in Delta-E, where lower means better accuracy. The S405 has a Delta-E of below 2.0, and anything below 3.0 is generally considered accurate for most end users.
Pro Decent picture quality
The S405 looks decent with adequately deep black levels, above-average color accuracy, and sufficient peak brightness levels for most content.
It’s especially great at reproducing dark scenes thanks to the panel’s contrast ratio of about 4000:1, which means blacks can get really dark at about 4000 times darker than the brightest white it can produce.
Colors are spot-on even without calibration, and the panel can get bright enough with a peak brightness level of ~200 nits to make them pop in dark environments.
The best viewing experience will be in a dark environment where the panel won’t have to compete with light. The S405’s screen can’t really get bright enough to perform as well in bright environments.
Con Somewhat narrow viewing angles
Because of the display technology used, pictures will only look best in a narrow viewing angle as it significantly loses color accuracy and brightness at a wider viewing angle.
Con Troublesome to fit on some TV tables
The TV stand's large size and cumbersome design might not make it suitable for some TV tables.
Con Some harmonic distortion
Harmonic distortion is even as the volume increases, but significant distortion is present in the low-mids.
Con No support for signals above 60 Hz
The TV supports signals up to 4K resolution and 60Hz with HDR support, meaning that most formats are supported except for 1080p at 120Hz.
Con HDR support is basic
The S405 can't reproduce HDR pictures very well because it lacks various important features.
HDR won't look much different from SDR due to the lack of wide color gamut and low peak brightness. It can't reproduce the full range of colors necessary for HDR, and the brightness level of only ~200 nits is barely enough for HDR content to stand out.
The black levels are also insufficient for highlights to stand out, and it won't be as dynamic as one would expect for HDR due to the lack of local dimming.
Con Can't fight glare very well
The S405 can deal with low amounts of light, such as sunlight through curtains, but it won't be able to deal with significantly bright light.
Apart from being unable to get bright enough, its handling of reflections is only average. The panel has a semi-gloss finish which helps in reducing reflections a little, but its peak brightness level of ~200 nits is not enough for fighting glare.
Con Remote lacks functionality
The S405 has a basic remote that is only capable of navigation, playback control, and volume control. It doesn't have fancy stuff like voice command found in remotes of other TVs.
Con Poor sound quality
The speakers on the S405 are too bassy, so distortion becomes a huge problem at high volumes. A relatively cheap speaker system or a soundbar will make a huge difference in sound quality.
Con Lacks support for Dolby Vision
The S405 only supports the HDR10 format for HDR content.
Con Not suitable for group watching
The S405 has a narrow viewing angle that makes it unsuitable for watching with groups.
People sitting away from the center of the screen will not experience the same picture as those sitting in the center because the picture quality starts to deteriorate significantly when viewing from just ≥30° away from the screen's center.