The 65A9G is a 65 inch 4K TV from Hisense. It was launched in 2021. It features a True 10-bit OLED panel. It can display a max resolution of 3840 x 2160 with a refresh rate of 120 Hz and pixel density of 68 ppi.
Picture Quality
Now, the next important spec of a display that impacts picture quality is its Color Gamut.
This TV comes with 97% DCI P3 color gamut coverage. This is equivalent to 132.27% sRGB coverage. The color quality on this TV will be Lifelike!
What is Color gamut ?
Color gamut specification of a TV indicates the range of colors that the TV can produce.
A panel with poor color accuracy will produce undersaturated/washed out colors that will not be pretty to look at.
It is specified in different units - sRGB,sRGB (standard RGB), NTSC, DCI P3 to name a few.
As for this TV it is specified using DCI P3.
But you don't need to worry about that, here is a chart that you can use to choose a TV with good color accuracy.
Other than color accuracy, you should look at the static contrast specification as it impacts the picture quality the same way.
Understanding Static Contrast
There are two types of contrast specifications for a TV. Static and Dynamic. We are interested in static contrast ratio as dynamic doesn't matter much.
This specification defines the intensity of black levels. That is, a TV with SC ratio less than 1000:1 will produce black images something like this:

Apart from this, such TVs are also prone backlight bleeds that will rob your experience — as shown below.

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 produce less shades of colors, so lesser detail overall.
Given this TV comes with an OLED panel, its static constrast should be Infinity : 1. So no need to worry about this at all.
HDR is also supported on this TV in form of Dolby Vision, HLG (Hybrid Log Gamma), HDR10+, Dolby Vision IQ and HDR10.
Coming to brightness, the peak brightness it can achieve is 800 nits.This amount of brightness is good enough even for a well-lit room!
Gaming Performance
If you are not into gaming, you can safely ignore these specs. But if you are also going to use the TV for gaming or use it as a PC monitor, make sure to take 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 1 ms. 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 inputs changes the content of your TV. For casual Non-FPS games, input lag doesn't matter much.
But ideally, get a TV that features an input lag and response time of less than 20ms.
Dimensions and Ergonomics
Vertically, the TV measures 65 inches and horizontally 57.36 inches. It is just 4.29 inches thick.
Overall the TV weighs around 42.0 kgs (including stand). Without stand, it weighs 27.9 Kilograms. So plan your space accordingly.
Now, speaking of ergonomics — VESA mount is supported on this TV with an interface size of 300 x 200 mm. Swivel, Tilt or Pivot features are not supported on this unit.
Hardware and Audio
The internals of this TV is powered by 4-Core (2x ARM Cortex-A73 + 2x ARM Cortex-A52) CPU and its graphics engine is handled by a (ARM Mali-G51) GPU.. There is no data about the available RAM on this TV.
To power its UI, the TV runs VIDAA U5.0 Operating System.
For display connectivity, Hisense has provided four HDMI 2.0 (CEC) ports and one AV Composite In (Video + L/R) 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).
For wireless connections on this TV, you will have — a 5Ghz Wi-Fi, 2.5 Ghz Wi-Fi, Wifi-Direct and Bluetooth.
Speaking of speakers, it is packaged with 6 x 10W built-in speakers. It also comes with a built-in subwoofer. So you don't have to invest on any external sound system.
Now, coming to power usage, the TV uses 124 Watts on average and 0.5 Watts on standby.
It supports a power outlet of 100 V - 120 V/50 Hz - 60 Hz.