The TCL 6 Series (R617/R615) is a very good 4k TV for a wide range of usages. It has good dark scene performance due to the full-array local dimming and high native contrast so blacks appear deep even in a dark room. It is also great for HDR, as it has a great brightness. Although it can produce a wider color gamut than Rec. 709, it isn't as wide as other great HDR TVs. It also has an excellent low input lag for gamers, and unlike last year's TCL P607 it can flicker the backlight to clear up fast motion and interpolate low frame rate content.
The TCL 6 Series is also known as the R615 or R617 depending on the manufacturer variant.
The design of the TCL 6 Series is decent, similar to most TCL TVs we have tested. The stand is wide but very stable, and the TV feels slightly bulky due to the square design of the TV's bezel. It will not stand out as a premium TV but is quite functional.
Like most TCLs, the R617 has a stand that is nearly the full width of the TV. You will need a very wide table to put it on. It is made from metal and feels strong and sturdy. This change in material is nice from the plastic feel of older TCL models.
Footprint of the 55" TV stand: 47.8" x 10.6"
The legs can also be reversed, in which case the stand measures 28.5" x 10.6".
The rear of the TV is simple. The top half is metallic and the body is plastic.
There is no cable management, so it can look a bit messy for those who enjoy clean setups with hidden cables.
The TCL 6 Series stays quite cool. In fact, it scored one of the lowest average temperatures of the TVs we tested in 2017-8.
It has two big vents, one on the bottom and one in the back allowing the temperature on the screen to be fairly uniform.
The TCL 6 Series has very good picture quality. The native contrast is excellent, and it has a decent local dimming feature that can further boost the black levels. While blacks aren't as deep as the P607, this is still a great TV for dark room viewing. The TV is much brighter than last year's P607, this is especially noticeable in HDR. Gray uniformity is decent, but we have received reports from many people with much worse uniformity. Like the P607, the viewing angle is bad. Out of the box, colors have good accuracy, and the calibration is easy and fast with the TCL app. Decent color volume, but deep dark colors aren't displayed very well.
The TV has amazing contrast. It matches many of the high end TVs we have tested. Although it does not reach the contrast levels of the TCL P607/605 models it certainly follows their legacy of excellent contrast.
The contrast increases with local dimming since the full array panel manages to darken the blacks without sacrificing much brightness. This is great for dark room performance.
The local dimming on the TCL R615/617 series is decent, and it can produce deeper dark scenes which is very noticeable especially when viewed in a dark room.
On the other hand, there is some obvious clouding around the moving objects. This is because of the inherent limitations of FALD technology and should not worry most people.
Update: The text has been updated to better explain why we see some clouding.
Great SDR peak brightness, it performs well in a bright room. The TV boosts the bright sections of the screen when other areas are dimmer. This is shown by how the smaller window tests are brighter than the larger ones.
The TCL R617/615 has great HDR peak brightness. Bright highlights in HDR content will be shown fairly bright, very close to the level of 1000-4000 cd/m² they're intended to be.
Overall the HDR brightness is much better than last year's TCL P605/607 which is great.
The gray uniformity of our TCL 55R617 is decent. Especially in the 50% image, clouding is present and there is some dirty screen effect, this is especially noticeable when there is a panning shot during sports.
We have received many reports of gray uniformity issues with the TCL 6 Series. The results of our TV seem typical of this model, but many people have received TVs with worse uniformity. Gray uniformity results will vary from unit to unit.
The viewing angle is poor. Blacks and colors shift rapidly as you move away from the front, and the brightness drops quickly as the angle increases a few degrees.
As with most TCLs we have reviewed it is most suitable for a narrow viewing environment.
The Sony X720E is a better choice for a wide viewing angle.
The black uniformity of the TCL 6 Series is good. Although there is some clouding in the native black uniformity, the performance improves when local dimming is enabled. This reduces clouding only around the test cross.
The TCL 6 Series has a semi-gloss finish that works well in diffusing reflections across the screen. However, when viewed in a bright room the reflections may be somewhat distracting especially if the source is facing the TV.
Out of the box, the TCL 55R617 has good color accuracy. The color temperature is quite warm, so everything it slightly red/yellow. Gamma already follows our target well. White balance and color dE are low enough that most people won't notice much of a difference.
The 617/615 has to calibrated with the TCL app. Calibration is very easy to do and both the white balance and the CMS respond very well to calibration. The blue dE was not as easy to correct, but remains accurate.
Post calibration, the TV is one of the most accurate TVs on the market. Gamma follows the target curve perfectly, and white balance and color dE are nearly perfect. The overall color temperature is a bit warm still, but very close to the target 6500K.
See our recommended settings here.
There are some artifacts visible with 4k content due to the sub-pixel dimming. This performs similarly to the P607 (see here), but shouldn't be an issue for most people and is mostly noticeable when used as a PC monitor.
This type of dithering is uncommon, and is only seen on some TCL TVs, including the S517 and R617. Most people won't notice it much, but occasionally it causes artifacts when it interferes with spatial dithering in games such as this green or purple shadow. (Note: the images are from the S517, but we expect them to be the same on the 6 Series.)
Update 29/05/2018: We have received a report that the 49" S515/S517 has similar crosshatching to the S405, as seen here and we expect this to be the same in the R615/R617. This will bother some people especially when used as a PC Monitor.
The TCL 6 Series has a good color gamut, but slightly worse than last year's P607. It supports a wide color gamut, but it isn't as wide as other HDR TVs. HDR will look good, but bright outdoor scenes will lack some detail due to the TV's limited green reproduction.
Note that for this test, a PC was used as a pattern generator. Like many other TCL TVs, the TV detects the PC from the AVI infoframe and automatically switches to a PC mode which behaves a little bit differently. Using a HDFury Integral to mask the AVI infoframe results in a color gamut in the same ballpark, but slightly lower at around 65.8% Rec. 2020 uv.
The TCL 6 Series has decent color volume. In the P3 volume, it covers the gamut well; this is a great improvement over the TCL P607. In both color volumes, the darker colors are not displayed very well, and blues don't get very bright.
The performance is comparable to the 2017 TCL P605/P607 model although not quite as good. There is some small banding visible in dark reds, greens and grays, but no major banding in any color. Those minor imperfections are not likely to ruin a good HDR movie watching experience.
There is no image retention on this TV. As always this is good news for gamers and PC users who might use this TV as a monitor.
We don't expect VA panels to experience permanent image retention, as the VA panel in our long-term test appears immune.
The TCL 6 Series has good motion handling. The response time is great, and motion appears clear and relatively flicker-free due to the high backlight refresh rate. It can reduce the backlight frequency to help reduce stutter, but this results in some strange duplications. Movies look great and are judder-free.
Very good response time. Most of the blur in the above photo is due to persistence. Pixel response is similar to the P607. There is almost no overshoot in any of the transitions.
The TCL 55R617 mainly dims the backlight through PWM, although there is some amplitude dimming as well. The backlight flicker is hardly noticeable, as it flickers at 480Hz, a significant improvement over the 120 Hz flicker on the P607.
The TCL 6 Series has a new optional black frame insertion feature that can adjust the backlight flicker to help clear up motion by introducing flicker.
This can be enabled by going to Options->Advanced Picture Settings and turning LED Motion Clarity On.
The TV can flicker as low as 60 Hz, even in game mode, but there are some strange results. It appears to flicker each color individually, resulting in visible duplications of different colors, as seen here. This is also noticeable when moving around with BFI enabled.
The TV can interpolate lower frame rate content as high as 60 fps. Motion can look a little strange to some people when enabled, this is commonly known as the Soap Opera Effect. This does not work when connected to a PC, and there is no way to bypass this as this TCL automatically detects when it is connected to a PC.
Motion interpolation is new this year on the TCL R617, and it can be enabled by going to the Advanced picture settings menu, and setting Action Smoothing to either Off, Low, Medium or High.
The TCL 6 Series can display most content without stutter, but there is some noticeable stutter when playing 24p content - like Blu-ray movies. This is mostly noticeable in wide-panning shots.
The TV is judder free when playing native 24p content from a Blu-ray player. To remove judder from other sources, Natural cinema must be enabled in the Advanced Picture Settings menu. This is a significant improvement over all other TCL TVs we have reviewed.
The TCL 6 Series doesn't support any of the Variable Refresh Rate technologies like AMD Freesync. We tested on a PC with an AMD Radeon RX 580.
The TCL 6 Series has excellent low input lag, as long as Game mode is enabled. The input lag is extremely low, great for console gaming. When in PC mode, Game mode must be enabled to get the lowest input lag.
Like the 2018 Samsung TVs we have tested, there is no DTS passthrough, so it is recommended to connect your Blu-ray player or game console directly to your receiver if you want surround sound on movies.
Update 01/09/2019: We retested the DTS passthrough with the new firmware and it works properly thus giving you more options regarding your external device connectivity.
The TCL 6 Series has excellent low input lag, as long as Game mode is enabled. With Game mode disabled, input lag is extremely high. 1080p and 4k input lag is very similar. The TV is a 60Hz panel, as such 120Hz input is not supported.
For use as a PC monitor, the TV automatically detects when it is connected to a PC. If it doesn't automatically detect it, changing the input label to Computer will enable PC Mode. For the lowest input lag in PC mode, Game mode must also be enabled.
The TV supports most resolutions without issue. For use as a PC Monitor, PC mode must be enabled; either by the TV's auto-detection or by changing the input label to Computer. The TV must be in PC mode for chroma 4:4:4 to work.
All of the inputs are directed out the side. There is an included mini break out cable for composite input, but no component input.
Unlike the P607, there is no headphone output on the remote. To connect headphones, the audio output on the side of the TV is the only option.
Unlike the P607, there is no headphone output on the remote. To connect headphones, the audio output on the side of the TV is the only option.
For the audio return channel to work, CEC must be enabled in Settings -> System -> Control other devices (CEC) -> ARC (HDMI 3).
For 5.1 passthrough on the ARC, the Audio Mode must be set to Auto in the Settings -> Audio menu, with S/PDIF and ARC set to "Dolby D, DTS". With other settings no sound was getting passed through to our receiver, not even stereo PCM.
DTS passthrough doesn't work, which is unexpected since it did on last year's P607.
Update 06/05/2018: To support HDR on HDMI ports connected to an Xbox One, the HDMI ports must be manually set to HDMI 2.0 as the Auto setting will not automatically switch to HDMI 2.0 due to a detection issue.
Update 01/09/2019: We retested the DTS passthrough with the new firmware and now it works properly.
The TCL 6 Series has a sub-par sound quality. This TV does get loud enough for most situations and produces clear dialogs. However, it doesn't produce much bass and doesn't have a room correction system either. For a better sound, dedicated speakers or soundbars are recommended.
The frequency response is sub-par. The LFE (Low-frequency extension) is at 143Hz, which means this TV won't produce any thump or rumble, and not a lot of body and punch either. The response above the TV's LFE is relatively well-balanced, which is important for producing clear dialogs. However, since this TV doesn't have a room correction system, it wasn't able to remove the mode of our test room around 200Hz. Additionally, it gets loud enough for most situations, and doesn't produce an excessive amount of compression artifacts under heavier loads.
The distortion performance is about average. The overall amount of harmonic distortion is within good limits at 80dB SPL, but slightly elevated at max volume. This TV also produces high amounts of intermodulation distortion, which could translate to a less transparent treble. Both the effect will be subtle and won't be noticeable to most users.
The TCL 6 Series runs the Roku TV smart platform. The interface isn't as fancy as the competition, but it is very smooth and easy to use. The interface is remarkably fluid, and there are no frames drops or lagging. The Roku companion app is the best one out there, and the TV can cast the audio from native apps to your smartphone, great for late night listening. The remote doesn't have the audio headphone jack from last year's P607.
The interface is easy to use and smooth. There are no serious performance issues or dropped frames.
There are ads in the home menu, and there is no way to disable them. During our testing, we were presented with ads for other Roku devices compared to the suggested content ads that were present on previous TCL TVs.
The TCL 6 Series has a wide selection of available apps through the built-in Roku smart interface. There are also hundreds of streaming channels available, many of them free. The built-in apps are able to play pretty much everything. It is one of the best smart TVs we've tested in 2018.
The remote included with the TV doesn't use IR, so it does not require line of sight. Unlike the enhanced remote included with the P607, the R617 does not have an audio output on the remote. With the removal of this feature the remote is quite a bit lighter and thinner than the P607 remote.
The basic remote on the R615 requires line-of-sight to the TV, and does not have voice control options.
The TCL remote app is the best one out there. Aside from working as a replacement remote, it can cast the TV's audio (from apps only) to your phone. You can also browse the Roku Streaming Channels store and add apps and channels to your TV from there. It also provides easy access to more advanced settings, and is the only way to access the white balance calibration of the TV.
We tested the 55" (55R617). For the most part, we expect our review to be valid for the 65" version (65R617) as well. We have received wide reports of issues with gray uniformity. While we expect our results to be representative of most people's experience, results may vary.
If someone comes across a different type of panel or if their TCL R617 doesn't correspond to our review, let us know and we will update the review.
The variant found at Bestbuy (55R615) is the same TV, but it has a simpler IR remote that requires line-of-sight and does not have the voice control feature.
Warehouse outlets will sell the R613, which is identical to the R617 including the voice remote, but still does not include the private listening feature of the P607.
|Size||Model||Best Buy Variant||Warehouse Varient|
In Europe, the TCL models are completely different and do not directly correspond with the U.S. models.
Update 01/07/2019: TCL has announced the addition of a 75" model. It has more local dimming zones, and there have been some reports that it has a native 120 Hz panel, but we don't know for sure.
The TCL R617 is a great, versatile TV that offers excellent value. It outperforms most of the competition in the same price bracket and is the best Roku TV we've tested so far. See also our recommendations for the best TVs under $1,000.
The Vizio P Series 2018 is better than the TCL 6 Series R617 (R613/R615). The Vizio P Series has better motion handling than the TCL R617 thanks to the higher refresh rate, and is nearly flicker-free. It also has a better local dimming feature that improves dark room viewing. The Vizio P's motion interpolation feature is more advanced thanks to the native 120 Hz panel, and it can interpolate 60 fps content up to 120 Hz.
The Samsung NU8000 and the TCL 6 Series (R617) have very similar performance. The TCL R617 has better local dimming performance, so blacks look deep in a dark room and better HDR peak brightness that makes highlights pop in HDR content. The Samsung NU8000, on the other hand, supports FreeSync variable refresh rate which can eliminate tearing if you play video games. Finally, the Samsung NU8000 has better gray uniformity, so the image is free from clouding or shadows in slow panning uniform-color shots like a hockey arena or a soccer field.
The TCL R617 (6 series) is significantly better than the TCL S517 (5 series). The TCL R617 incorporates local dimming support to improve blacks in a dark room, and at the same time, it can get brighter which is great for a bright room with glare. The TCL R617 has better response time so only a small blur trails the image when you watch sports and has an optional black frame insertion to introduce flicker and make the image crisper. Finally, the TCL R617 has much better HDR performance.
The TCL R617 6 Series is much better than the Samsung NU7100. The TCL R617 can deliver deeper blacks with its local dimming support, and this is great for watching movies in a dark room. The TCL 6 Series also has a faster response time and thus a smaller blur trail, and better HDR performance with highlights that pop. The Samsung NU7100, on the other hand, has a lower input lag which is great for fans of video games and better gray uniformity for an image without clouding.
The TCL 6 Series R617/R615/R613 is better than the Hisense H9E Plus. The TCL R617 is a lot brighter than the H9E Plus, so it is better able to overcome glare in a bright room. HDR performance is much better on the R617 as it features a full array local dimming feature, great for dark room viewing, and it is brighter, so bright highlights really stand out in HDR. The R617 also has lower input lag and supports chroma 4:4:4, great for use as a PC monitor.
The Sony X900F is better than the TCL 6 Series (R617). The Sony X900F displays deeper blacks in a dark room due to better local dimming, and this is great if you watch movies. The Sony X900F can also handle reflections better and has a faster response time that leaves only a small blur trail. It also has better gray uniformity for an image without clouding or shadows. On the other hand, the TCL R617 has a lower input lag which is great if you play video games.
The TCL 6 Series R617 is slightly better than the Vizio M Series 2018. The TCL R617 can get brighter to fight glare in a bright room but can also display deeper blacks in a dark room since it has better native contrast ratio and support for local dimming. Also, the TCL R617 has a lower input lag which is great if you play video games. It has better HDR performance and better motion handling features as it has support motion interpolation. The Vizio M Series 2018, on the other hand, has better reflection handling and better gray uniformity which is great if you watch sports in a room with many lights.
The TCL 6 Series R617 is somewhat better than the TCL P607. The TCL R617 has a motion interpolation feature which will please the soap opera effect fans and a slightly better SDR peak brightness which is great if you watch TV shows in a brighter room. The TCL R617 also has better black frame insertion (BFI) that clears the image blur in fast action. On the other hand, the TCL P607 has slightly better contrast, which is great if you watch movies in a dark room and a lower input lag to please those who play video games.
The TCL R617 is much better than the Sony X750F. The TCL has better blacks and better HDR performance due to the high native contrast ratio and local dimming support. It also has better brightness and a wide color gamut, and in HDR, it can make highlights pop. It has lower input lag which is important if you play games or use the TV as a PC monitor. On the other hand, the Sony has better viewing angles and is more suitable for wide seating arrangements.
The TCL R617 is a better TV than the LG UK7700. The TCL617 has a VA-panel and can display deeper blacks and brighter highlights due to the better contrast ratio and better brightness, so you will enjoy watching movies and HDR movies more on the TCL. On the contrary, the LG UK7700 has an IPS panel and is better for watching TV shows and sports, as it can better handle the reflections of a room with many light sources, has better gray uniformity and wide viewing angles to accommodate for wide seating arrangements.
The TCL 6 Series R617 is much better than the TCL C807. The R617 is brighter, and also has better dark room performance thanks to the full array local dimming feature and better black uniformity. Motion looks crisper with less blur thanks to the faster response time, and the better black frame insertion feature can further improve motion clarity.
The Vizio P Series 2017 is slightly better than the TCL 6 Series R617. The Vizio P Series 2017 is much better for watching movies as it has better local dimming and better black uniformity and also has better motion interpolation. The TCL R617 has better input lag which is great if you play video games or use the TV as a PC monitor. If you watch a lot of TV shows, the TCL has better upscaling and can handle reflections slightly better.
The TCL 6 Series R617 is much better than the LeEco Super4. The R617 is much brighter and has a local dimming feature that is great for dark room viewing. The R617 is able to consistently remove judder from all 24p sources, great for watching movies, and the R617 has a better black frame insertion feature that improves the clarity of motion. The R617 also has much lower input lag, which is great for gamers.
The Sony X720E is a decent budget TV released in late 2017. Overall performance is worse than the R617. It has a poor contrast ratio and no local dimming feature, so dark room performance isn't great. For sports, it is a trade-off between the two. The R617 is brighter, but the X720E has a better viewing angle and has fewer issues with gray uniformity, so it depends on your needs. For use as a PC monitor, get the X720E, otherwise, the R617 is better.
The LG UK6300 is a decent budget TV. The R617 is better than the UK6300 in almost every way. Similar to the X720E, the UK6300 has better gray uniformity and a wider viewing angle. If your main use is for sports or for use as a PC monitor, the UK6300 or Sony X720E are better choices due to the gray uniformity issues with the R617. Otherwise, the TCL is a better TV.