The 58A6GQ is a 58 inch 4K TV from Hisense. It was launched in 2021. It features a 10-bit VA panel.
The max. resolution it can display is 3840 x 2160 @ 60 Hz with a pixel density of 76 ppi.
Picture Quality
After screen size and resolution, the next important spec to look for in a display is its Color Reproduction (defined by its color gamut specification).
This TV is rated with a 95% DCI P3 color gamut coverage. FYI, this is equivalent to 129.55% sRGB coverage. The color accuracy on this TV should be Lifelike!
Understanding the Color Gamut Specification
Color gamut specification of a TV indicates the range of colors that the display can display.
In layman terms, it determines the ability of a TV to produce accurate colors. A display with low color gamut coverage will miss out on some colors (such as deep red), so the image produced will look "washed out" in colors.
It is specified in different units - sRGB,sRGB (standard RGB), NTSC 1953, DCI P3 to name a few.
For example, the color gamut of this TV is specified in DCI P3.
But you don't need to worry about that, below is a chart that will help you choosing a TV with good color accuracy.
Other than color accuracy, the static contrast of a TV similarly impacts its picture quality.
Understanding Static Contrast
A TV with low static contrast ratio will not produce deep blacks and possibly bleed backlight as below:

The above TV's static contrast is rated 800:1. So make sure you get a TV with a static contrast of >= 1000:1. More is better.
Also, static contrast ratio and resolution go hand in hand when it comes to details. To put it into perspective, a TV with low contrast ratio will show both dark gray and black as black, so lesser detail overall.
This TV comes with a static contrast ratio of 4000 : 1., good enough to produce deep blacks. The panel comes with local dimming feature which is a plus.
Dolby Vision, HDR10, HLG (Hybrid Log Gamma) and HDR10+ are also supported on this TV.
Coming to brightness, it is can achieve a peak luminance of 300 nits, which is powered by Direct LED backlight.
Gaming Performance
If you aren't interested in gaming, you can safely ignore these specs. But if you are also going to use the TV for playing games or use it as a PC monitor, you should get a TV with the lowest input lag and response time.
The input lag on this TV is 20 ms and its minimum response time is N/A. It is acceptable for casual and non-FPS games but is not suitable for competitive or FPS games like COD.
Understanding Input lag and response time
This lag is the latency at which your key-presses or mouse movements changes the content of the TV. For casual Non-FPS games, input lag doesn't matter much.
For best of both worlds, get a TV that comes with an input lag and response time of less than 20ms.
Dimensions and Ergonomics
The vertical and horizontal measurements of this TV are 50.98 inches and 31.97 inches respectively. It is just 2.76 inches thick. It weighs 12.5 kilograms, another 0.1 kgs including stand. So plan your space accordingly.
Coming to ergonomics — VESA mount is supported on this TV with an interface size of 200 x 300 mm. The unit doesn't come with either Swivel, Tilt or Pivot support.
Hardware and Audio
The internals of this TV is powered by Quad Core (2x ARM Cortex-A73 + 2x ARM Cortex-A52) CPU and a (ARM Mali-G51) GPU.. However, Hisense didn't provide any information on the total RAM on the TV's official specsheet.
Speaking of OS, the Hisense 58A6GQ runs VIDAA U5.0 Operating System.
For display connectivity, there are three HDMI 2.0 (CEC) ports and one AV Composite In 3.5 mm jack port on this TV.
To connect USB devices, you have — 1x USB 2.0 and 1x USB 3.0. Other connectivity ports include — 1x Satellite In (F-type female), 1x Antenna (RF) (female), 1x CI+ 1.4 and 1x Ethernet RJ45 (100 Mbps).
Wireless connectivity options on the Hisense 58A6GQ include a 5Ghz Wi-Fi, 2.5 Ghz Wi-Fi, Wifi-Direct and Bluetooth 5.0.
The Audio unit of this TV is powered by 2 x 8W built-in speakers.
Now, coming to power consumption, on average, it consumes around 113.57 watts. On standby, it uses 0.5 watts.
It supports a power outlet of 100 V - 120 V/50 Hz - 60 Hz.