47.62"
26.79 "
55"
6'2"

Hitachi 55HAK6351

ABOUT THIS TV

Hitachi 55HAK6351 400x400 Image Hitachi 55HAK6351

Launched in the year 2021, the 55HAK6351 is a 55" 4K TV from Hitachi. It features a 10-bit IPS panel. It can achieve a maximum resolution of 3840 x 2160 @ 60 Hz with a pixel density of 80 ppi.

Picture Quality

After screen size and resolution, the next important specification of a display that impacts picture quality is its Color Gamut.

Hitachi did not provide a color gamut rating for this TV. So we have to take a guess. Considering the TV features amassive 55 inch screen, it won't come with a cheap panel, so here we can assume its equivalent sRGB coverage to be 90-100% or above. The color accuracy on this TV should be Lifelike! It will produce color accurate images.

What Color Gamut means ?

Color gamut spec of a display is a measure of the range of colors that the TV can show.

A display with poor color reproduction will produce washed out colors that will spoil the immersion.

It is specified in different units - sRGB,sRGB (standard RGB), NTSC 1953, DCI P3 Adobe RGB, rec.2020.

But don't worry, below is a chart that will help you choosing a TV with good color accuracy.

Color Gamut Chart

After color gamut, next in the list of important specifications that will impact your experience is Static Contrast.

Understanding the static contrast ratio

A TV with low static contrast ratio will not produce deep blacks and can bleed backlight as shown in the below image:

Backlight bleed exampleThe image is an example of another display, it is not this one

The static contrast ratio of above TV is rated 800:1. So make sure you get a TV with a static contrast of >= 1000:1. More is better.

Like resolution, the static contrast ratio is also equally responsible for details. To put it into perspective, a TV with low contrast ratio will produce less shades of colors, thus lesser detail overall.

If given a choice, always prefer a FHD TV with high contrast ratio over a 4K TV with low contrast ratio.

This TV comes with a static contrast ratio of 8000:1., good enough to achieve deep blacks. For the record, it also comes with local dimming backlight which is a plus.

HDR is also supported on this TV in form of HDR10, HLG (Hybrid Log Gamma) and Dolby Vision.

Coming to brightness, it is can produce a maximum brightness of 350 nits. The panel of this TV is powered by Direct LED backlight.

Gaming Performance

If you are planning to use your TV only for content consumption, you can safely ignore these specs. But if you are also planning to use the TV for playing games or use it as a PC monitor, make sure to get a TV with the lowest input lag and response time.

Unfortunately, Hitachi did not specify the input lag on this unit. But since this is not a cheap TV, input lag on this TV could be 20ms or below.

What is Input lag ?

This lag is the latency at which device inputs changes the content of your display. For casual Non-FPS games, input lag doesn't matter much.

But ideally, look for a TV that comes with an input lag and response time of less than 20ms.

Ergonomics and Dimensions

Coming to ergonomics — VESA mount is supported on this TV with an interface size of 200 x 200 mm. There is no Swivel, Tilt or Pivot feature support on this TV.

The TV measures 55 inches vertically and 48.58 inches horizontally. Coming to thickness, it is 3.23 inches thick.

It weighs around 11.24 kilograms, another 2.5 kgs if you include stand.

Hardware and Audio

The core of Hitachi 55HAK6351 is powered by 4-Core CPU. There is no mention on the total RAM on this TV.

The UI on this TV is powered by Android TV Operating System.

For display connectivity, Hitachi has provided three HDMI 2.0 (ARC; CEC) ports on this TV.

For connecting USB devices, it includes two USB 2.0 ports. Other connectivity ports include — 1x Satellite In (F-type female), 1x CI+, 1x Antenna (RF) and 1x Ethernet RJ45.

For connecting to this TV wirelessly, the manufacturer has provided a 5Ghz Wi-Fi, 2.5 Ghz Wi-Fi, Wifi-Direct, Bluetooth and DLNA.

Coming to audio, Hitachi has provided 2 x 10W built-in speakers on the 55HAK6351.

In terms of power usage, the TV consumes 131.2 Watts on average and 0.5 Watts on standby.

It supports a power outlet of 220 V - 240 V/50 Hz.

SPECSHEET

GENERAL
Brand
Hitachi
Type
Smart TV
Size
55" (inches)
Model Series
N/A
Model Number
55HAK6351
Operating System
Powered by Android TV
Launch Year
2021
DISPLAY
Panel
55" 10 bit IPS Panel
Bit Depth
10 bits (8 bits + FRC) ~1073741824 colors
Resolution
4K - 3840 x 2160 ~80 ppi
Refresh Rate
60 Hz
Response Time
N/A
Input Lag
N/A
Brightness
350 Nits
Backlight Source
Direct LED
Static Contrast
N/A
Dynamic Contrast
N/A
Display Coating
N/A
Color Gamut
sRGB: 90-100% (approx.)
DCI P3: N/A
NTSC 1953: N/A
Rec 2020: N/A
Adobe RGB: N/A
HARDWARE
Display Ports
3 x HDMI 2.0 (ARC; CEC)
Network Connectivity
  • LAN
  • Wi-Fi
  • 802.11a (IEEE 802.11a-1999)
  • 802.11b (IEEE 802.11b-1999)
  • 802.11g (IEEE 802.11g-2003)
  • 802.11n (IEEE 802.11n-2009)
  • 802.11n 5GHz
  • Bluetooth
  • Wi-Fi Direct
  • DLNA
  • 1 x Ethernet RJ45
Other Ports
  • 1 x Satellite In (F-type female)
  • 1 x CI+
  • 1 x Antenna (RF)
  • 2 x USB 2.0
Audio
Speakers: 2 x 10W
Inbuilt Subwoofer: N/A
Ports: 1 x 3.5 mm Audio Out ,
1 x Optical Audio Out
Chipset
RAM: N/A
CPU: 4 Core CPU
GPU: N/A
Power Consumption
Average: 82 W
Maximum: 49.2 W
Standby: 0.5 W
Power Outlet
220 V - 240 V @ 50 Hz
Energy Class
G
FEATURES AND TECHNOLOGY
Marketed Features
Screen Interpolation
Value: N/A
Technology: N/A
Frame Rate Control
Yes
DIMENSIONS AND WEIGHT
Screen
Width: 47.62 " (inches)
Height: 26.79 " (inches)
Diagonal: 55" (inches)
Body
Width: 48.58 " (inches)
Height: 27.99 " (inches)
Depth: 3.23 " (inches)
Weight: 12.3kg
Body with Stand
Width: 48.58 " (inches)
Height: 29.25 " (inches)
Depth: 9.49 " (inches)
Weight: 13.74 kg
ERGONOMICS
Viewing Angle
Horizontal: 178 °
Vertical: 178 °
Pivot Support
Left Pivot: N/A
Right Pivot: N/A
Tilt Support
Forward Tilt: N/A
Backward Tilt: N/A
Swivel Support
Left Swivel: N/A
Right Swivel: N/A
Height Adjustment
No
Vesa Mount Support
Yes
Interface: 200 x 200 mm
ENVIRONMENT LIMITS
Altitude
Storage: N/A
Operation: N/A
Temperature
Storage: N/A
Operation: N/A
Humidity
Storage: N/A
Operation: N/A

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