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4K55N400A
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KD-55X77L
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What we think

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The PerfectRec TV team Learn more
Updated April 10, 2024·

Choosing between the Amazon 4-Series and the Sony X77L depends on what you prioritize. If keeping costs low is your main concern and you're okay with lower performance across various content types like movies, sports, and gaming, the Amazon 4-Series is more budget-friendly. However, the Sony X77L, while more expensive, offers better picture quality in bright rooms, improved sound quality, and additional accessibility features such as voice commands. The Sony X77L also supports HDR formats like HLG and Dolby Vision, which enhances the viewing experience for content that utilizes these technologies. If picture quality, a wider color gamut, and compatibility with more HDR formats matter to you, and you're willing to pay more, then the Sony X77L would be the better choice. 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 X77L (LCD).
Advantages of the Sony X77L (LCD)
  • Good for upscaling
  • Very good motion processing
  • Good viewing angle

Key differences

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Sports

5.7
4K55N400A
KD-55X77L
6.8
2.5/10
MOTION PROCESSING
8.5/10
60Hz
REFRESH RATE
60Hz
8.0/10
INPUT LAG SCORE
8.7/10
6.6/10
UPSCALING
7.0/10
6.8/10
SDR BRIGHTNESS SCORE
7.2/10
Yes
HLG SUPPORT
Yes
The Sony X77L (LCD) is only fair for sports, while the Amazon 4-Series (LCD) is poor.

Cartoons & Animation

5.4
4K55N400A
KD-55X77L
6.0
5.9/10
COLOR GAMUT SCORE
5.9/10
6.2/10
COLOR VOLUME SCORE
6.3/10
6.8/10
SDR BRIGHTNESS SCORE
7.2/10
3.4/10
COLORS OUT OF THE BOX SCORE
8.8/10
5.9/10
GRAY UNIFORMITY
7.7/10
The Sony X77L (LCD) is only fair for cartoons & animation, while the Amazon 4-Series (LCD) is poor.

Cost

$330
4K55N400A
KD-55X77L
$498
Product image
Product image

$100

$200

$300

$400

$500

$600

$700

$800

The Amazon 4-Series (LCD) has a price of $330 and the Sony X77L (LCD) costs $498.
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Key similarities

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Picture Quality

5.7
4K55N400A
KD-55X77L
5.6
7.13/10
CONTRAST
3.58/10
6.2/10
COLOR VOLUME SCORE
6.3/10
LED
PANEL TYPE
LED
VA
PANEL SUB-TYPE
IPS
The Amazon 4-Series (LCD) and Sony X77L (LCD) both have poor picture quality.

Movies & TV

5.2
4K55N400A
KD-55X77L
5.2
7.13/10
CONTRAST
3.58/10
5.9/10
BLACK UNIFORMITY
5.8/10
6.6/10
UPSCALING
7.0/10
Yes
HDR10 SUPPORT
Yes
No
HDR10+ SUPPORT
No
No
DOLBY VISION SUPPORT
No
The Amazon 4-Series (LCD) and Sony X77L (LCD) are both poor for movies & TV.

Gaming

5.5
4K55N400A
KD-55X77L
5.8
5.6/10
RESPONSE TIME SCORE
5.9/10
8.0/10
INPUT LAG SCORE
8.7/10
2.5/10
MOTION PROCESSING
8.5/10
0.0/100
GAMING LOCAL DIMMING
5.0/100
5.7/10
GAME HDR BRIGHTNESS SCORE
6.4/10
The Sony X77L (LCD) and Amazon 4-Series (LCD) are both poor for gaming.

News, Talk, & Other TV

5.7
4K55N400A
KD-55X77L
6.0
6.8/10
SDR BRIGHTNESS SCORE
7.2/10
6.6/10
UPSCALING
7.0/10
Although they have very similar scores, PerfectRec considers Sony X77L (LCD) to be only fair for news, talk, & other TV, while the Amazon 4-Series (LCD) is poor.

Bright Room

6.1
4K55N400A
KD-55X77L
6.0
5.2/10
VIEWING ANGLE
7.7/10
6.8/10
SDR BRIGHTNESS SCORE
7.2/10
5.6/10
HDR BRIGHTNESS SCORE
6.2/10
6.3/10
REFLECTIONS SCORE
6.3/10
The Amazon 4-Series (LCD) and Sony X77L (LCD) are both only fair for bright room.

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How the Amazon 4-Series (LCD) and the Sony X77L (LCD) compare to other TVs

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Spec Comparison

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Amazon 4-Series (LCD)Sony X77L (LCD)
Amazon 4-Series (LCD)Sony X77L (LCD)

GENERAL

Price
$330
$498
Brand
AmazonSony
Release Date
August 3, 2021July 3, 2023
Full name
4K55N400AKD-55X77L
Screen Size
55"55"
Screen Resolution
4K4K

TV FEATURES

Operating System
Fire OSGoogle TV
Sound Quality Score
6.1/106.1/10
NextGen Ready
NoNo
HDMI Ports
43
Coax Ports
11

DISPLAY QUALITY SCORES

Picture Quality Score
5.8/105.6/10
Bright Room Score
6.1/106/10
Gaming Score
5.6/105.8/10
Movies & TV Score
5.3/105.2/10
Sports Score
5.8/106.9/10

PHYSICAL

Dimensions w/o Stand (H x W x D)
28.3" x 57.2" x 3.5"28.5" x 49" x 2.9"
Dimensions with Stand (H x W)
29.8" x 57.2"31.1" x 49"
Weight without Stand
42.5 lbs33.8 lbs
VESA Mount
300 x 300300 x 300

DISPLAY

Color Depth
10 bit10 bit
Black Frame Insertion
NoYes
Auto Low Latency Mode
YesYes
Contrast
7.1/103.6/10
Local Dimming
2.5/103/10

SOUND

Speaker Setup
2.02.0
Speaker Power
16 W20 W
Dolby Atmos
Bypass onlyYes
DTS:X
NoUp to DTS Digital Surround, Bypass only

Shopping

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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 X77L (LCD)

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Dig into reviews and images

HDTVs and more

Milton Clark | September 2023
"For an entry-level model, Sony’s X77L is a decent 4K TV. It’s color reproduction, along with crisp and clean picture images revealed plenty of detail and clarity thanks in part to Sony’s excellent video processing."

Get a great deal on the Amazon 4-Series (LCD) or the Sony X77L (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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Why trust us

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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.

By the numbers

385
TVs evaluated
33,110
TVs stats compiled
21
Proprietary TVs ratings developed
121,230
Recommendations made
18,185
Consumer hours saved

About the TV team

Joe Golden, Ph.D

CEO and TVs Editor
Joe is an entrepreneur and lifelong electronics enthusiast with a Ph.D in Economics from the University of Michigan.

Jason Lew

Staff Expert & Software Engineer
Jason is a staff expert and software engineer that has been making laptop recommendations for 7 years and moderates one of the largest laptop subreddits.

Chandradeep Chowdhury

Staff Expert & Software Engineer
Chandradeep is a staff expert and software engineer and expert in televisions and monitors. He’s been making monitor recommendations for ten years.

Jaime Roldán

TVs Expert
Jaime is a Colombia-based TV expert. He is an electronics engineer with 8 years of experience in the telecom sector and has been making TV recommendations for 12 years.

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