The Panasonic TX-65GX800 is one of the most affordable Ultra HD models from the Japanese manufacturer. Ultra high definition at a discount or good value for money? This is what we will see in this test …

Presentation

The Panasonic TX-65GX800 has a 65-inch (approx. 165 cm) VA panel displaying an Ultra HD definition of 3,840 x 2,160 pixels. The manufacturer announces compatibility with all HDR standards, whether HDR10, HLG, HDR10 + and even Dolby Vision, which is interesting in this price range. In terms of the audio system, you have to make do with two 10 W speakers. As for the heart of the TV, it is entrusted to the My Home Screen 4.0 home system.

This television is currently sold for less than € 1,000, and sometimes even much less, which sometimes makes it a very good deal. It is also available in 40 (102 cm), 50 (127 cm) and 58 inch (140 cm) versions at the respective prices of 600, 750 and 800 €.

Image quality

This television uses a VA (Vertical Alignment) type LCD panel. This display technology provides good contrast by effectively blocking light from the backlight. In return, the viewing angles are smaller than on an IPS or Oled LCD television.

The Panasonic TX-65GX800 does have a VA panel, easily recognizable by its sub-pixels.

We measured a variation in brightness of 65% at 45 °, a little less than on other VA televisions (around 70%), with the exception of very high-end models using an optical filter improving the viewing angles ( Samsung QE85Q85R / QE65Q90R or Sony 65XG9505 ). This is very far from what Oled technology offers (only 25% variation at 45 °).

True Cinema mode provides the most accurate rendering. In this mode, we measured a delta E of only 2. The colors can thus be considered as faithful to those sent by the source. Only a few shades exceed a Delta E of 3, a threshold above which the human eye perceives colorimetric drift.

By setting the TV’s gamma to 2.3, the measured curve is stable over the entire spectrum (average at 2.29). The grayscale rendering is therefore generally very good.

By default, the average color temperature is measured at 6,890 K, a value fairly close to the reference value (6,500 K) and above all the curve is stable over the entire spectrum.

With a ratio of 4,620: 1, the contrast is excellent for an LCD TV. However, Panasonic has given in to the sirens of dynamic brightness to improve contrast. The white measured at 150 cd / m² on our target at 35% thus goes to 168 cd / m² on our target containing 1% of white, i.e. an average of 159 cd / m² on the white and 0.04 cd / m² on the black. This contrast ratio makes it possible to display deep blacks, even in a room without light.

The Full HD version scaled on the left and the native Ultra HD version on the right. [/ Media]

The scaling engine allows you to resize SD, HD and Full HD content so that they display correctly on this Ultra HD panel. This fairly basic engine produces a smoothed image that does not distort the original source and limits the artifacts.

In terms of motion compensation, the motor does its best to limit jerks, but it cannot improve sharpness in the absence of a 100 Hz panel. The 50 Hz prevents the insertion of black images via scanning backlight.

HDR

The Panasonic is one of the rare televisions compatible with the two dynamic metadata formats HDR10 + and Dolby Vision in addition to the classic HDR10 and HLG. Remember that HDR10 + and Dolby Vision are particularly effective on entry-level TVs since they take into account the capabilities of the TV and thus avoid clipping (white saturation).

 

Clouding

The Panasonic 65GX800 uses an Edge-Led backlight system which only has one backlight bar located at the base of the panel. If we did not find clouding problems on the model we tested, the risk is present, because the diffusion filter is fragile and can be damaged during transport. This results in the appearance of grayish spots on a uniform background . Finally, we did not notice any light leakage on our test model; on the other hand, vertical blooming is sometimes annoying, especially on the subtitles, and more generally on all light objects on a black background.

Audio

The audio system consists of two 10 W speakers. The sound is fine for a TV. Speakers offer the luxury of going down quite low and covering a fairly wide spectrum between 90 and 20,000 Hz. As often, it is still better to opt for a sound bar, a home theater kit or even a PC speaker kit .

Consumption

We measured consumption at 77 W on our target with a white set at 150 cd / m², a relative consumption of only 66 W / m², much lower than the average of the televisions tested (around 100 W / m²). This TV directly competes with the most energy-efficient models, such as the Samsung QE65Q60R with 66.1 W / m², the TCL 55DC760 with 66 W / m² or the Sony KD-65XG8505 – the most economical TV in our comparison – which only consumes 55.8 W / m². Standby consumption is always less than 1 W.

CONCLUSION

The Panasonic TX-65GX800 is a good Ultra HD TV. It displays a quality image, good finishes, a certain ease of use, but like other televisions in this price range, it cannot boast of displaying a beautiful HDR image. For this, we must turn to more expensive models like the Sony 65XF9005 which currently offers one of the best HDR quality / price ratios on this diagonal.