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4K55N400A
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OLED55B1
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What we think

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

If you're on a tight budget and need a TV, the Amazon 4-Series (LCD) is an economical choice, but it offers poor performance across most content including movies, sports, and gaming, and isn't ideal for dark or bright rooms. However, if you can invest more, the LG B1 (OLED) excels in overall picture quality, especially in dark rooms, with its excellent viewing angles making it great for movies and series. Its performance is also very good for sports and gaming, but it may not be as bright as some other TVs in very sunny rooms. The LG B1 also supports advanced features like Dolby Vision and has better sound, but keep in mind, OLED screens are at a risk of permanent burn-in, so they may not be best for static content like using as a PC monitor. 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 LG B1 (OLED).
Advantages of the LG B1 (OLED)
  • Good for bright room
  • Very good for dark room
  • Very good for gaming
  • Very good for movies & TV
  • Very good for sports
  • Very good for news, talk, & other TV
  • Very good for cartoons & animation
  • Very good for use as monitor
  • Very good for upscaling
  • Very good motion processing
  • Excellent viewing angle
  • Excellent reflections

Key differences

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Picture Quality

5.7
4K55N400A
OLED55B1
8.4
7.13/10
CONTRAST
10.00/10
6.2/10
COLOR VOLUME SCORE
7.1/10
LED
PANEL TYPE
WOLED
VA
PANEL SUB-TYPE
WBC
The LG B1 (OLED) has very good picture quality, while the Amazon 4-Series (LCD) has poor picture quality.

Movies & TV

5.2
4K55N400A
OLED55B1
8.9
7.13/10
CONTRAST
10.00/10
5.9/10
BLACK UNIFORMITY
10.0/10
6.6/10
UPSCALING
8.0/10
Yes
HDR10 SUPPORT
Yes
No
HDR10+ SUPPORT
No
No
DOLBY VISION SUPPORT
Yes
The LG B1 (OLED) is very good for movies & TV, while the Amazon 4-Series (LCD) is poor.

Sports

5.7
4K55N400A
OLED55B1
8.3
2.5/10
MOTION PROCESSING
8.0/10
60Hz
REFRESH RATE
120Hz
8.0/10
INPUT LAG SCORE
8.0/10
6.6/10
UPSCALING
8.0/10
6.8/10
SDR BRIGHTNESS SCORE
7.0/10
Yes
HLG SUPPORT
Yes
The LG B1 (OLED) is very good for sports, while the Amazon 4-Series (LCD) is poor.

Gaming

5.5
4K55N400A
OLED55B1
8.9
5.6/10
RESPONSE TIME SCORE
9.4/10
8.0/10
INPUT LAG SCORE
8.0/10
2.5/10
MOTION PROCESSING
8.0/10
0.0/100
GAMING LOCAL DIMMING
100.0/100
5.7/10
GAME HDR BRIGHTNESS SCORE
6.7/10
The LG B1 (OLED) is very good for gaming, while the Amazon 4-Series (LCD) is poor.

Cartoons & Animation

5.4
4K55N400A
OLED55B1
8.1
5.9/10
COLOR GAMUT SCORE
8.1/10
6.2/10
COLOR VOLUME SCORE
7.1/10
6.8/10
SDR BRIGHTNESS SCORE
7.0/10
3.4/10
COLORS OUT OF THE BOX SCORE
7.1/10
5.9/10
GRAY UNIFORMITY
9.6/10
The LG B1 (OLED) is very good for cartoons & animation, while the Amazon 4-Series (LCD) is poor.

News, Talk, & Other TV

5.7
4K55N400A
OLED55B1
8.5
6.8/10
SDR BRIGHTNESS SCORE
7.0/10
6.6/10
UPSCALING
8.0/10
The LG B1 (OLED) is very good for news, talk, & other TV, while the Amazon 4-Series (LCD) is poor.

Bright Room

6.1
4K55N400A
OLED55B1
7.0
5.2/10
VIEWING ANGLE
9.1/10
6.8/10
SDR BRIGHTNESS SCORE
7.0/10
5.6/10
HDR BRIGHTNESS SCORE
6.6/10
6.3/10
REFLECTIONS SCORE
9.2/10
The LG B1 (OLED) is good for bright room, while the Amazon 4-Series (LCD) is only fair.

Cost

$330
4K55N400A
OLED55B1
$1,497
Product image
Product image

$0

$500

$1,000

$1,500

$2,000

$2,500

The Amazon 4-Series (LCD) has a price of $330 and the LG B1 (OLED) costs $1,497.
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How the Amazon 4-Series (LCD) and the LG B1 (OLED) compare to other TVs

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Spec Comparison

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Amazon 4-Series (LCD)LG B1 (OLED)
Amazon 4-Series (LCD)LG B1 (OLED)

GENERAL

Price
$330
$1,497
Brand
AmazonLG
Release Date
August 3, 2021March 1, 2021
Full name
4K55N400AOLED55B1
Screen Size
55"55"
Screen Resolution
4K4K

TV FEATURES

Operating System
Fire OSwebOS
Sound Quality Score
6.1/107.8/10
NextGen Ready
NoNo
HDMI Ports
44
Coax Ports
11

DISPLAY QUALITY SCORES

Picture Quality Score
5.8/108.4/10
Bright Room Score
6.1/107/10
Gaming Score
5.6/108.9/10
Movies & TV Score
5.3/109/10
Sports Score
5.8/108.3/10

PHYSICAL

Dimensions w/o Stand (H x W x D)
28.3" x 57.2" x 3.5"27.8" x 48.3" x 1.8"
Dimensions with Stand (H x W)
29.8" x 57.2"29.3" x 48.3"
Weight without Stand
42.5 lbs41.7 lbs
VESA Mount
300 x 300300 x 200

DISPLAY

Color Depth
10 bit10 bit
Black Frame Insertion
NoYes
Auto Low Latency Mode
YesYes
Contrast
7.1/1010/10
Local Dimming
2.5/1010/10

SOUND

Speaker Setup
2.02.2
Speaker Power
16 W40 W
Dolby Atmos
Bypass onlyYes
DTS:X
NoNo

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."

Get a great deal on the Amazon 4-Series (LCD) or the LG B1 (OLED)

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 LG

LG, a prominent TV brand from Korea, has played a significant role in popularizing OLED TVs. OLED technology is hailed as the future of TV technology. Their TVs employ WebOS, a proprietary smart TV software that not only offers seamless functionality but also includes gaming-specific features, earning praise from players worldwide. Often regarded as the gateway to unparalleled viewing experiences, LG's mid-range OLEDs come highly recommended, making them a worthwhile investment for those willing to stretch their budget for superior quality.

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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
54,930
Recommendations made
8,240
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.

Nick Landia, Ph.D

Chief Data Scientist
Nick is a machine learning expert with a Ph.D in recommendation systems from the University of Warwick.

Aaron Koller, Ph.D

Head of Product
Aaron is a product leader and recommendation enthusiast with a Ph.D in philosophy from Syracuse University.

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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