By default, the monitor has 90% brightness and 80% contrast. To achieve a 100nit brightness of white I reduced the brightness and contrast settings to 56% and 55%, respectively. Increasing the contrast up to the maximum value does not lead to a loss of lights on this monitor, as opposed to most other models. The monitor controls its brightness by means of modulation of the power of the backlight lamps at a frequency of 340Hz.
Color gradients look striped on this monitor irrespective of the current settings. Another drawback is that at a contrast of 35% and lower dark tones merge into a single black color.
The gamma curves are neat enough, but the image will look pale due to the rise of the curves in the middle part of the diagram. At the reduced contrast the left part of the curves becomes almost horizontal in the leftmost fifth of the diagram, especially the blue curve, which explains the poor reproduction of darks when the contrast setting is low.
There are only three color temperature modes, but they are quite satisfactorily set up: the difference of temperatures within one mode is not bigger than 1000K. The temperature values correspond to the names of the modes: the Warm mode is indeed rather warm and the Cold one is reasonably cold.
The monitor offers a curious setting called Skin Tone which can be set at Reddish, Normal, and Yellowish. It’s not quite clear what or whose skin they mean because the image becomes so Reddish and so Yellowish that I can’t think of a possible application for this menu option.
The monitor’s response time is a typical example of a modern TN matrix with RTC: an average of 3.1 milliseconds with a maximum of 4.7 milliseconds. This maximum is recorded not on switching between close color tones, but on switching to white when the compensation mechanism does not work.
The RTC error is 14.7% on average with a maximum lower than 50%. This is not perfect and any user can see this error as light trails which are most obvious when the monitor is switching between two tones with similar brightness levels.
The monitor’s contrast ratio is average for this matrix type while the maximum brightness is a little lower than the common value of 250 nits.
A curious thing about the ASUS MB19TU is that its specified characteristics are similar to the more expensive PG191 but in reality these two models only have the same response time. The MB19TU has a much more accurate color temperature setup than the PG191, but has a problem with reproducing darks at reduced contrast which was not observed in the PG191. If it were not for this problem and for the high level of RTC errors, the MB19TU might be recommended as an inexpensive, nice-looking and very fast monitor. The mentioned drawbacks spoil the impression from it somewhat, though.