The Samsung KU6600 is a UHD LED TV with good picture quality. It is almost the same TV as the often recommended Samsung KU6300, with a curve. It provides good performance in a dark room, and supports a HDR10 signal but doesn't benefit from the extra information. Unfortunately the motion handling isn't as good as some other TVs and the image degrades when viewed at an angle.
The design is similar to most other Samsung TVs. It has a central stand which looks quite good and works well for those with smaller tables.
The stand is very similar to last year's JS8500. It attaches to the centre of the TV but is still quite wide. This does result in quite good support.
Footprint of the 55" TV stand: 13.0" x 34.1"
The curve does make the TV appear thicker than usual, but it also has a thicker back than most Samsung TVs such as the KU7000 or the KS series.
The Samsung KU6600 has a good picture quality. The blacks are really deep and dark scene performance is great due to the high native contrast ratio and also due to the excellent black uniformity. Even though the KU6600 can display HDR content, the performance is restricted by the lack of local dimming, the average peak brightness and the limited color gamut. Blu-rays look really good on this TV and even lower resolution content like DVDs look great once upscaled to a 4k resolution. Finally, this TV might not be the best to watch sport with a lot of friends, since dirty screen effect is noticeable and also because it has a relatively narrow viewing angle, diminishing the picture quality a lot when viewed from the side.
The native contrast ratio is excellent for the KU6600 TV. Blacks look very deep which should provide a very good dark room performance. Dark scene in movies will be especially very nice without too much loss of detail in the very dark scenes.
The KU6600 doesn't support any local dimming features. The video is for reference only.
Note that on this set, we did notice some dimming occurring automatically. This is due to 'CE Dimming' often found on Samsung TVs, but this is not a local dimming feature. The only way to disable 'CE Dimming' is to put the TV in PC mode.
The peak brightness is average and almost the same in SDR and HDR, which is a good thing for when you watch normal content. Some HDR TVs can only obtain max peak brightness when an HDR signal is detected leaving normal peak brightness much lower.
The peak brightness is average for the KU6600 TV. The smaller size windows peak brightness is relatively lower than the rest of the other test windows. This is due to the strong 'CE dimming' implemented on this TV, making the screen dim a lot when displaying any scene with only a small bright highlight on a generally dark screen.
Gray uniformity is average for this Samsung TV. Like many other mid range direct lit LED TVs, the rows of LEDs of the backlight drive can be seen. Both left and right borders of the TV are darker than the center with 3 horizontals bands which are darker that the rest of the screen. Some warmer spots are also visible here and there.
Dirty screen effect is visible and is relatively comparable to what you get on the Samsung KU6300. Sport fans will notice it when watching sports like hockey or football, but during movies or other TV shows, it should still be acceptable.
Viewing angle is average but is in line with some of the best 2016 Samsung LED TVs. When viewed from the side, the contrast diminishes considerably and the colors lose saturation, leaving the screen looking much darker than when it is when viewed front straight on.
Update: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results.
Black uniformity is also very good on this set. When looking at our test picture, some faint clouding can be seen in the top left part of the screen, but this is the only moment that we could really notice this. No clouding could be seen while watching normal content nor even when looking at our test image.
The KU6600 can display our test image without too many problems and without any gradation marks normally seen on an 8 bit panel. Like the Samsung KU6300, there are some little imperfections in the darker shades and especially in the green, but nothing that would really be noticeable when watching normal content.
Prior to calibration the results are quite good. The white balance is a little bit too warm, but for most people a calibration is not necessary.
Calibration is relatively easy. The white balance isn't as responsive as some other Samsung TVs but provided good results. You can see our recommended settings here.
Doesn't support a wide color gamut. This test was performed with a HDR10 signal. This result is good enough for Rec. 709 content, but will not display an increased range of colors for HDR.
Similar performance to other TVs without wide color gamut support, such as the KU6300. Fine for SDR content but can't produce a wide range of colors for HDR.
The TV has a semi-gloss finish. This helps to diffuse direct reflections across the screen, making them less intense. It is more reflective than most other TVs, and is better suited to a room without too much direct light.
This TV doesn't support 3D.
Motion performance is average. Some blur can be seen following fast moving objects, which may be an issue for sports or fast paced games. Judder is present when watching movies from all sources, but this isn't an issue as most people aren't sensitive to it. Some motion interpolation features are available for those who like the soap opera effect.
The motion performance of the KU6600 is average. Some motion blur can be noticed following moving objects. For most people this won't be an issue, but may be distracting for fast paced content. The backlight uses PWM flickering to dim below about 50%. This can be seen in the repetitions following the logo. This is a bit worse than the similar model KU6300.
The KU6600 uses PWM at 120Hz to dim the backlight. It is also possible to enable black frame insertion to clear up moving images, but this produces a visible flicker. Unfortunately this isn't available when in game mode.
Movies from any source play with some judder. Most people aren't sensitive to it, so this isn't an issue.
The KU6600 has a 60Hz panel, which is able to interpolate lower refresh rate content for those who enjoy the soap opera effect.
The KU6600 is good TV for those looking for a computer monitor or to pair your latest generation gaming console. It can display with high detail pretty much all the most demanding resolutions and input lag is also great even when HDR is detected. Even though the number of HDMI ports is limited, they are all fairly easily accessible, even if the TV is installed with a wall mount.
Input lag is low, which is good. For best results, use the 'Game' viewing mode. With the PC icon selected for chroma subsampling support the input lag is slightly higher, but still quite good.
To enable support for higher bandwidth resolutions, activate 'HDMI UHD Color' from the picture menu. This is only possible on HDMI 1. To display chroma subsampling correctly, label the HDMI input to 'PC'.
HDR Blu-rays play through all HDMI ports on the TV, but some 8 bit gradations can be seen when using HDMI 2 or HDMI 3.
The TV supports 5.1 passthrough for Dolby Digital and DTS, but it is necessary to select the correct audio type in the sound settings, since it doesn't change automatically.
Sound quality is average for a TV. At louder volumes the frequency response deteriorates and distortion increases. A soundbar would be an improvement over the TV speakers.
Note: Sound Quality test for TVs reviewed before 2017 was performed at 75dB, 85dB, and Max SPL. Starting 2017, the target SPL levels have been changed to 70dB, 80dB, and Max dB SPL.
Average performance. Frequency response is decent at lower volumes, but pumping and compression will be present at higher volumes. Maximum loudness is pretty good at 90.1dB but low-frequency extension of 142Hz is poor, even for a TV.
Average harmonic distortion performance. The amount of harmonic distortion produced at 75dB and 85dB is quite decent. However, there is a significant jump in distortion at maximum volume, mostly in the Mid Range.
The KU6600 has the newest version of Samsung Tizen smart platform. It works well and is improving in speed and stability each year. It isn't the best looking offering, but is intuitive to use and provides a wide range of apps and features. Netflix, Amazon Video, Hulu and YouTube are all available, with many more downloadable from the app store. The TV features device discovery for CEC, allowing it to easily and automatically interface with connected devices. It is also possible to play files directly from a USB.
When a new device is detected (such as when a computer is woken from sleep while plugged into an HDMI port) the TV automatically switches to this device. This may be an annoyance if you are watching other content at the time.
The remote is the same as other 6 series Samsung TVs, such as the K6250 or the KU6500. It is minimal and easy to use.
We tested the 55" (UN55KU6600), version FA01. This is the only size available at the moment.
If someone comes across a different type of panel or if their Samsung KU6600 doesn't correspond to our review, let us know and we will update the review.
The Samsung KU6600 has good picture quality, but competes in a price range with strong competition. For a mid-range TV it provides a good all-round experience.
The Samsung KU6300 is almost the same TV, with slightly different design (flat screen) and slightly better motion handling. For both TVs the picture quality degrades when viewed at an angle. They are both a good choice for a wide range of usages, and at the price point offer a lot of value. Go with whichever is cheapest.
The Sony X700D is another versatile TV with a wide range of features. It offers better performance for those with wide seating, but is less suited to a dark room due to the low native contrast ratio. It offers much better motion handling for sports and video game fans. For those with wide seating in a bright room it's a very good choice, otherwise the Samsung KU6600 is a better option.
The Vizio M Series 2016 is usually sold for slightly more, but provides much better picture quality in dark scenes due to the local dimming features. It also handles motion better for fast paced games or sports, and offers low input lag for video games. Unfortunately it doesn't support chroma subsampling for PC use. If you can afford it, go with the Vizio M Series 2016.
The LG UH7700 is available for a higher price, but provides much better picture quality when viewed at an angle. Unfortunately the dark room performance is limited by the low native contrast ratio. It has better motion handling and performs better in a bright room. For those who watch TV in a dark room the Samsung KU6600 is the way to go, but for a bright room get the LG UH7700 if you can afford it.