Sony KD55X81JAEP, Dolby Vision and Atmos for all budgets

sony kd55x81jaep foto destacada.jpg
sony kd55x81jaep foto destacada.jpg

When choosing a television we can get lost with countless technologies and technical data. For this reason, many buyers are carried away by names and brands established in the market and that have always enjoyed a great quality / price ratio. Sony is one of those manufacturers that have stayed in homes for decades. Perhaps the Sony KD55X81JAEP will probably end up in many homes by another benchmark in the industry, Dolby.

The  Sony KD-55X81 television is one of the models of the Japanese manufacturer for this 2021. It belongs to the mid-range, but it is one of the cheapest models. However, the Sony KD-55X81J teams up with Dolby to offer the best audiovisual experience. We added a 55-inch panel and AI visual enhancement technology to the formula for success.

Design and materials

We begin the review of the Sony KD-55X81J television talking about its design. Belonging to a mid-range, this model follows the clear minimalist trend of these products. With this objective, the aim is that the television is integrated into the living room and goes unnoticed. For this reason, the Sony KD-55X81 bets on a compact body with a thickness of 7.1 cm. It is true that it is not one of the slimmest televisions of the brand, but it is still a good candidate for wall mounting with VESA support.

The bezels aren’t the narrowest either, but they still give a good immersive feeling in the displayed images. The percentage of the approximate surface of the panel with respect to the front is close to 91%, which is a good figure. Another highlight of the model is that it rests on two V-shaped legs that can be placed in two positions . We can select a standard fit near the ends or a narrower fit for small furniture. The space that remains under the TV is enough to place a sound bar without obstructing the viewing.

support leg versatility
support leg versatility

Given the price of the Sony KD55X81JAEP we cannot ask for a metal rear, so we have to settle for the use of plastic. Of course, both the body construction and the legs have good finishes and there are no creaks from heat or pressure. The dimensions of the TV are 124.3 x 78.7 x 33.8 cm and it weighs 18.3 kg with the legs. This model is only available in black, a common one of these Sony products.

Technical characteristics of the Sony KD55X81JAEP



Make model Sony KD55X81JAEP / Sony KD-55X81 / Sony KD-55X81J
Size 55 ″ (139 cm), flat
Resolution UHD (3820 x 2160 px)
Aspect ratio 16: 9
Frequency 50 – 60Hz
Backlighting D-LED
Processor 4K Sony X1 processor
Smart tv Android TV 9.0
Bluetooth Yes, 4.2
HDR Yes, HDR10, HLG and Dolby Vision
Interpolation Motionflow XR 400/480 Hz
Main features
  • 4K HDR Processor X1
  • Object-based HDR
  • Compatible with Google Home and Chromecast built-in
  • Compatible with Apple AirPlay / Apple HomeKit
Sound 20W, 2.0ch, Dolby Atmos
Dimensions without stand (Height x Width x Depth) Approx. 124.3 x 71.9 x 7.1 cm
Dimensions with stand (Height x Width x Depth) Approx. 124.3 x 78.7 x 33.8 cm
Weight (Without / With stand) 15.7 kg / 18 kg
VESA compatibility Yes, 300 x 300
HDMI ports 4 x HDMI 2.0 (one of them eARC)
USB ports 2 x USB 2.0
Other connections
  • Ethernet
  • Composite video
  • Optical audio output
  • RF
  • WiFi 5Ghz
CI + Integrated Yes, v1.4
Energy Class Category G 114W



Image quality

This model is armed to the teeth with all the news for the brand’s mid-range. It is one of the most affordable models, but we were pleasantly surprised to check the characteristics of its interior. It mounts a 55-inch diagonal panel and a 4K resolution, obtaining a pixel density of 80 dpi. Equipped with 10-bit D-LED backlight (8-bit + FRC). It renders at a maximum brightness of 380 cd and achieves a 1,100: 1 contrast ratio. Therefore, it is capable of offering a good result in HDR.

Its technical Sony 4K HDR Processor X1 uses algorithms to optimize the visual response of the panel, greatly reducing visual errors such as noise and improving the level of definition to appreciate even the smallest detail. It also makes good use of its intelligent image scaling in resolutions lower than 4K, either from DTT or a Blu-Ray Disc player. Although it is also thanks to the use of 4K X-Reality PRO technology implemented in this processor.

We have talked about sharpness and that is something that is often lost with action scenes or in video games. However, the Sony KD55X81JAEP does not have a big problem with the Motionflow XR 400Hz tool This technology inserts additional frames between the originals. Therefore, we have a viewing of these scenes with great fluidity and in which we do not lose information.

The importance of colors and HDR

One of Sony’s key technologies is TRILUMINOS PRO, a feature that analyzes the visual characteristics of programs or content. Thus it is able to show faithful and natural images at the level of saturation and tone of the colors that make up the scene. By the way, in the TV settings it incorporates several modes to obtain the desired effect such as the usual Cinema, Videogames or Dolby Vision.

ambient light sensor for automatic adjustment of displayed images
ambient light sensor for automatic adjustment of displayed images

In fact, Dolby makes an appearance twice, visually and soundly, as we will see later. The Sony KD-55X81J is compatible with the most popular HDR standards, highlighting the implementation of HDR 10 and Dolby Vision . In addition, it includes Object-based HDR technology, which is responsible for analyzing the scenes individually. So HDR images explore hues with adaptive brightness and expanded contrast.

Connectivity, Smart TV and sound of the Sony KD55X81JAEP

Connectivity is resolved for most users. It incorporates a total of 4 HDMI 2.0 inputs (ARC, HDCP2.3), composite video, Ethernet input, optical and 3.5 mm audio output. We add two USB ports suitable for DTT recording and multimedia content playback. Finally the WiFi 5GHz, DLNA and Bluetooth 4.2.

As we are used to, your remote control has a microphone to access the Google Assistant voice functions. And it is that Sony KD55X81JAEP implements the Google ecosystem with Chromecast built-in and its Android TV 10 with access to the most popular services and apps. Additionally, Apple device users will benefit from Apple AirPlay streaming.

share your content from an android or apple device
share your content from an android or apple device

Previously we talked about the arrival of Dolby to the television twice. As we saw in the Sony KE-55XH8196 , Dolby Atmos makes an appearance to offer an immersive sound experience at home. On the contrary, its sound system is rather simple. We have a 2.0 ch configuration and 20W RMS power. However, it employs X-Balanced Speaker speakers, which are innovatively designed to deliver crisp, nuanced response.

Sony KD-55X81: Pros and Cons




  • Elegant design with versatile legs
  • X1 4K HDR Processor
  • Motionflow XR
  • Compatible with Google Assistant and Chromecast built-in
  • HDR10 and Dolby Vision
  • Apple AirPlay 2




  • Improved sound but still insufficient
  • It has no visual enhancements for video games





Image quality
System / Smart TV
Price / quality ratio


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