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Sony KD-55XG8577 Review: Is this 2019 model still worth it?

Last year Sony presented us with a series of televisions that stood out for including several of the most recent technologies for that time, however, it has been almost a year of that and the question of a lot is is it still worth it? Especially if we consider that new models continue to come out at a good price that could put aside the teams of that year.

However, the Sony KD-55XG8577 maintains a good performance , and its characteristics are still quite useful, so, we are going to learn more about everything it can offer us.


We have a simple design that has the necessary details to consider it good

The design is nothing to write home about , however, that simplicity makes it more striking than you might think , in addition, it has a very interesting elaboration that stands out in different points. In general terms we are going to witness a slightly elegant aesthetic that gives a modern and subtle touch in any environment.

First of all, we must talk about its front that offers us thin bezels that will take advantage of the screen quite well , here we can use about 94% of the useful area that will be a good space for content playback. Its sides are a bit wider, but the frames as such will be thin and are a good complement to the rest of the design.

The rear part gives us a good workmanship that shows cleanliness and a different style to what we have seen in different models . The only thing we find in this space are the connectors that are located in a good way to access it more easily. The building materials are a bit weak , so we need to be careful when placing it.

Its supports have a good size and thickness, therefore, they turn out to be very useful unlike others that are sometimes even cumbersome. In any case, we can choose to remove them and use the VESA that allows us to place the television on the wall, with this we will achieve a better integration with the design that is in the home . Remember that this is presented in silver with black.


This theme is not a problem and we have a large number of connectors that can be used for different actions. If you want to know in more detail what they are and the available tuners, we have left you a table of specifications at the top . In this case, the most important thing is its three USBs, where we highlight that one is version 3.0, therefore, it will be perfect for transmitting large files. Likewise, there are four HDMI 2.0 ports (eARC; CEC). In the wireless we can use Wi-Fi, Bluetooth 4.2 and DLNA.

Image quality and functions in general

Image quality is acceptable thanks to the different technologies implemented

Let’s talk about the image quality offered by the Sony KD-55XG8577, which we think is quite good and meets our expectations very well. To begin with, with an Edge LED panel that could be one of the weak points, since the quality difference is quite noticeable with the Direct LED that the 2020 models integrate , so, it will be a point to consider.

In any case, it maintains some positive things , for example, its viewing angles that allow us to maintain the same definition from any position we maintain, in addition, it offers us a refresh rate of 100 Hz – 120 Hz , which is still a characteristic of high-end televisions. With this we get the movements to be more fluid without any type of cut.

Likewise, we are going to have spectacular colors, in fact, many experts consider that Sony has the best tones on the market . In this case we have Live Color Technology and Triluminos Display that allow us to visualize completely natural and precise scenarios. As if that were not enough, the dynamic contrast will be exact to obtain great lighting in any environment .

Without a doubt, colorimetry is one of the strongest points that even make us want to buy this TV. None of this would be possible without the support of a well-powered processor . For this model we find the X-1 that does not reach the quality of the Ultimate, but maintains a good performance, in addition, it allows to enjoy an interesting scaling with a Super Bit mapping system .


The audio quality is not bad , it even seems sufficient to us at certain times or specific content . The only detail that we find as negative is the power of its speakers that still seems a bit limited. In this case we have 20W that will fall short in more demanding content, however, the inclusion of technologies such as DTS Digital, Dolby Digital Plus and Dolby Atmos offer us a more enveloping and clean sound. But the best thing is to buy an external sound bar that gives us all that missing audio.

Software review / Smart TV and other notable features

One of the most attractive things is its operating system

Finally, the Sony KD-55XG8577 offers us a very competitive operating system that has even been considered one of the best today. We are talking about Android 9.0 Pie , although we must mention that some televisions still integrate version 8.0 Oreo, so you should take a good look before purchasing it. With this system we get the broadest catalog of applications that reaches more than 5,000 options , so our entertainment is fully insured.

Obviously it has compatibility with an advanced voice assistant that allows us better control of the television, since we can access actions very easily with the commands that we can create. Another interesting option is its compatibility with Dolby Vision, HDR10 and HLG dynamic formats that are responsible for further improving the image quality in order to achieve greater details about each scene that we are viewing.

We finish by mentioning that it includes the 1000 Hz MotionFlow XR technology that allows us to enjoy a better behavior when playing games, since it considerably reduces Input Lag and movements are usually more fluid and precise. Of course, this is the only option we have available for this topic , although it can be a great option to start with.

Sony KD-55XG8577: Pros and Cons



  • Good design
  • Connectivity
  • Image quality is good
  • Dolby Atmos and Dolby Digital Plus
  • Android 9.0 Pie
  • Voice assistant compatible


  • Power of your speakers
  • Its price is still a bit high

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