Hanns.G HL231 review

Price when reviewed

Hanns.G’s HL231 is a fine-looking monitor. Gloss black plastic reaches all around and, thanks to the external power supply, it’s beautifully slim.

Hanns.G HL231 review

At this price, though, it would be churlish to expect a high-quality LCD panel or luxuries such as an adjustable stand. Instead, there’s a 23in LED-backlit Full HD TN panel, and the slender stand tilts back and forth but nothing more. There’s no HDMI input, either: only D-SUB and DVI, plus an audio input for the tinny integrated speakers.

First impressions are less than stellar. Contrast was set way too high by default and as a result the HL231 delivered a washed-out image.

Thankfully, it’s a deficiency that’s easily fixed. Reducing contrast to 60 in the onscreen menu dropped brightness from 270cd/m2 to 230cd/m2, but also improved colour accuracy, bringing the average Delta E down from 5.3 to 2.4. With gamma at 2.1 and colour temperature at 6,813k, the HL231 is about as good as budget monitors get.

Hanns.G HL231

In fact, the HL231 has few serious weaknesses. There’s backlight leakage around the panel’s edges but it isn’t too intrusive, and while the backlight is a touch uneven, it isn’t bad for a budget TN panel.

Greyscales exhibit mild banding, blacks look a little grey and pastel shades aren’t as well handled as they are by pricier IPS-based monitors panels, but the HL231 puts in an impressive performance in movies, photos and games.

Our Avatar Blu-ray looked fantastic on it, with the rich assortment of blues and greens never veering into oversaturation. Our selection of test photos were well handled, too, with crisp detail and neutral skintones.

The final feather in its cap is its power consumption. While drawing 18W at a measured brightness of 120cd/m2 isn’t exemplary, it is noticeably more frugal than the IPS-based panel of Viewsonic’s VP2365wb.

Despite stiff competition in the budget arena, Hanns.G’s HL231 can hold its head high. If you really can’t stretch to the extra outlay of Viewsonic’s superlative VP2365wb, the HL231 guarantees good image quality at a very low price.


Image quality4

Main specifications

Screen size23.0in
Aspect ratio16:9
Resolution1920 x 1080
Screen brightness250cd/m2
Pixel response time5ms
Contrast ratio1,000:1
Horizontal viewing angle170 degrees
Vertical viewing angle160 degrees
TV tunerno
TV tuner typeN/A


DVI inputs1
VGA inputs1
HDMI inputs0
DisplayPort inputs0
Scart inputs0
Upstream USB ports0
USB ports (downstream)0
3.5mm audio input jacks1
Headphone outputno
Other audio connectorsNone

Accessories supplied

Other cables suppliedVGA
Internal power supplyno

Power consumption

Peak power consumption27W
Idle power consumption1W

Image adjustments

Brightness control?yes
Contrast control?yes
Extra adjustmentsClock, phase, sharpness


Forward tilt angle5 degrees
Backward tilt angle15 degrees
Swivel angleN/A
Height adjustmentN/A
Pivot (portrait) mode?no
Bezel width19mm


Dimensions547 x 189 x 352mm (WDH)

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