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Updated April 10, 2024·
If you're on a budget and primarily watch TV in a room that isn't too bright, the Amazon 4-Series could be a suitable choice. However, the overall picture quality and performance in bright environments are not its strengths, and it generally performs poorly for gaming, sports, and movies. In contrast, the Sony X90K costs more but offers good to very good performance across the board, including movies, sports, and gaming, even in bright rooms. It also has superior motion processing, better sound, and is better suited for HDR content due to its support for Dolby Vision and HDR10+. If you can afford it, the Sony X90K provides a more versatile viewing experience. Give Feedback
this description is based on the product variant with some specs and product variant with some specs. At the time of writing, the variant with some specs cost some dollars and the variant with some specs cost some dollars.
Advantages of the Amazon 4-Series (LCD)
- The Amazon 4-Series (LCD) has no clear advantages over the Sony X90K (LCD).
Advantages of the Sony X90K (LCD)
- Very good for bright room
- Good for dark room
- Very good for gaming
- Good for movies & TV
- Good for sports
- Very good for news, talk, & other TV
- Very good for cartoons & animation
- Good for use as monitor
- Best in class for upscaling
- Best in class motion processing
Key differences
Picture Quality
5.7
7.7
7.13/10
CONTRAST
7.38/10
6.2/10
COLOR VOLUME SCORE
7.8/10
LED
PANEL TYPE
LED FALD
VA
PANEL SUB-TYPE
TBD
The Sony X90K (LCD) has good picture quality, while the Amazon 4-Series (LCD) has poor picture quality.
Movies & TV
5.2
7.5
7.13/10
CONTRAST
7.38/10
5.9/10
BLACK UNIFORMITY
6.1/10
6.6/10
UPSCALING
10.0/10
Yes
HDR10 SUPPORT
Yes
No
HDR10+ SUPPORT
No
No
DOLBY VISION SUPPORT
Yes
The Sony X90K (LCD) is good for movies & TV, while the Amazon 4-Series (LCD) is poor.
Sports
5.7
7.1
2.5/10
MOTION PROCESSING
10.0/10
60Hz
REFRESH RATE
120Hz
8.0/10
INPUT LAG SCORE
7.0/10
6.6/10
UPSCALING
10.0/10
6.8/10
SDR BRIGHTNESS SCORE
8.7/10
Yes
HLG SUPPORT
Yes
The Sony X90K (LCD) is good for sports, while the Amazon 4-Series (LCD) is poor.
Gaming
5.5
8.1
5.6/10
RESPONSE TIME SCORE
8.0/10
8.0/10
INPUT LAG SCORE
7.0/10
2.5/10
MOTION PROCESSING
10.0/10
0.0/100
GAMING LOCAL DIMMING
76.0/100
5.7/10
GAME HDR BRIGHTNESS SCORE
8.6/10
The Sony X90K (LCD) is very good for gaming, while the Amazon 4-Series (LCD) is poor.
Cartoons & Animation
5.4
8.0
5.9/10
COLOR GAMUT SCORE
7.7/10
6.2/10
COLOR VOLUME SCORE
7.8/10
6.8/10
SDR BRIGHTNESS SCORE
8.7/10
3.4/10
COLORS OUT OF THE BOX SCORE
7.0/10
5.9/10
GRAY UNIFORMITY
6.6/10
The Sony X90K (LCD) is very good for cartoons & animation, while the Amazon 4-Series (LCD) is poor.
News, Talk, & Other TV
5.7
8.7
6.8/10
SDR BRIGHTNESS SCORE
8.7/10
6.6/10
UPSCALING
10.0/10
The Sony X90K (LCD) is very good for news, talk, & other TV, while the Amazon 4-Series (LCD) is poor.
Bright Room
6.1
8.0
5.2/10
VIEWING ANGLE
5.4/10
6.8/10
SDR BRIGHTNESS SCORE
8.7/10
5.6/10
HDR BRIGHTNESS SCORE
8.3/10
6.3/10
REFLECTIONS SCORE
6.3/10
The Sony X90K (LCD) is very good for bright room, while the Amazon 4-Series (LCD) is only fair.
Cost
$330
$1,028
$0
$500
$1,000
$1,500
$2,000
The Amazon 4-Series (LCD) has a price of $330 and the Sony X90K (LCD) costs $1,028.
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How the Amazon 4-Series (LCD) and the Sony X90K (LCD) compare to other TVs
Spec Comparison
 |  | |
| Amazon 4-Series (LCD) | Sony X90K (LCD) |
GENERAL | |||
|---|---|---|---|
| Price | |||
$330 | $1,028 | ||
Brand | |||
Brand | Amazon | Sony | |
Release Date | |||
Release Date | August 3, 2021 | May 1, 2022 | |
Full name | |||
Full name | 4K55N400A | XR-55X90K | |
Screen Size | |||
Screen Size | 55" | 55" | |
Screen Resolution | |||
Screen Resolution | 4K | 4K | |
TV FEATURES | |||
|---|---|---|---|
Operating System | |||
Operating System | Fire OS | Android TV | |
Sound Quality Score | |||
Sound Quality Score | 6.1/10 | 8/10 | |
NextGen Ready | |||
NextGen Ready | No | Yes | |
HDMI Ports | |||
HDMI Ports | 4 | 4 | |
Coax Ports | |||
Coax Ports | 1 | 1 | |
DISPLAY QUALITY SCORES | |||
|---|---|---|---|
Picture Quality Score | |||
Picture Quality Score | 5.8/10 | 7.7/10 | |
Bright Room Score | |||
Bright Room Score | 6.1/10 | 8/10 | |
Gaming Score | |||
Gaming Score | 5.6/10 | 8.1/10 | |
Movies & TV Score | |||
Movies & TV Score | 5.3/10 | 7.5/10 | |
Sports Score | |||
Sports Score | 5.8/10 | 7.2/10 | |
PHYSICAL | |||
|---|---|---|---|
Dimensions w/o Stand (H x W x D) | |||
Dimensions w/o Stand (H x W x D) | 28.3" x 57.2" x 3.5" | 28" x 48.5" x 2.8" | |
Dimensions with Stand (H x W) | |||
Dimensions with Stand (H x W) | 29.8" x 57.2" | 29.2" x 48.6" | |
Weight without Stand | |||
Weight without Stand | 42.5 lbs | 38.5 lbs | |
VESA Mount | |||
VESA Mount | 300 x 300 | 300 x 300 | |
DISPLAY | |||
|---|---|---|---|
Color Depth | |||
Color Depth | 10 bit | 10 bit | |
Black Frame Insertion | |||
Black Frame Insertion | No | Yes | |
Auto Low Latency Mode | |||
Auto Low Latency Mode | Yes | Yes | |
Contrast | |||
Contrast | 7.1/10 | 7.4/10 | |
Local Dimming | |||
Local Dimming | 2.5/10 | 7.2/10 | |
SOUND | |||
|---|---|---|---|
Speaker Setup | |||
Speaker Setup | 2.0 | 2.0 | |
Speaker Power | |||
Speaker Power | 16 W | 30 W | |
Dolby Atmos | |||
Dolby Atmos | Bypass only | Yes | |
DTS:X | |||
DTS:X | No | Up to DTS Digital Surround, Bypass only | |
Shopping
Amazon 4-Series (LCD)
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Dig into reviews and images
Tech Advisor
Jim Martin | May 2023
"The attraction here is that the 4-Series uses Amazon’s Fire TV interface. Picture quality is good but unexceptional. At the discounted prices, which can seemingly be had regularly, they are better value."
Sony X90K (LCD)
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Dig into reviews and images
Techradar
Al Griffin | December 2022
"As Sony’s next-to-flagship LCD TV, the X90K series delivers impressive performance for the price. The XR90K had fairly accurate out-of-box color. The TV’s multi-position stand lets you either set the screen flush with any stand its mounted on or elevate it to clear space for a soundbar. With the latter option, you get around 3 inches of clearance enough to accommodate most soundbars. The X90K’s excellent suite of gaming features ranks it up there with the best 120 Hz 4K TVs."
Get a great deal on the Amazon 4-Series (LCD) or the Sony X90K (LCD)
About Amazon
Amazon, the largest online retailer in North America, has forged partnerships with TCL and Hisense to produce white-label TVs incorporating their Fire OS software. These Amazon-branded TVs typically compete in the low-end and mid-range segments, offering compelling price points. Leveraging their strong reputation, Amazon has swiftly built brand trust in the TV market despite being relatively new to it. To enhance their popularity, these TVs integrate features from the Amazon ecosystem, including Alexa, providing users with a seamless and interconnected TV experience.
About Sony
Sony stands as a highly experienced and widely trusted TV manufacturer, earning a reputation that surpasses all others. A Japanese company, Sony has been making TVs for far longs than it has been making Playstation game consoles. Sony's high-end TVs are often regarded as the ultimate choice for videophiles, representing the epitome of quality, albeit at a premium price point. Renowned for their advanced and precise motion handling, as well as their cutting-edge local dimming algorithms, Sony consistently delivers unparalleled performance in these areas. They include Google TV software with all their TV sets, which grants access to the largest selection of apps available and they also include Bravia Core which is a movie streaming platform specifically for Sony TVs that offers higher picture quality by using more bandwidth.
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This information was produced and vetted by the PerfectRec TVs team. We are a product research and recommendation organization that meticulously reviews and evaluates the latest TV information and makes it digestible for you.
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