Panasonic TX-40EX700E: A small interesting LCD TV

Panasonic TX-40EX700E: A small interesting LCD TV

Panasonic TX-40EX700E: A small interesting LCD TV
Panasonic TX-40EX700E Review. The Panasonic EX700 series can be considered as the mid-range of the manufacturer's Ultra HD TVs. On paper, the 40-inch TV we're testing here, the Panasonic TX-40EX700E, is one of the smallest high-performance TVs on the market. Let's see what he has in store for us.

We went to the Cobra Parmentier store located in the 11th arrondissement of Paris to test the Panasonic TX-40EX700E TV. This model features a 40-inch 10-bit (8-bit + FRC) VA panel with an Ultra HD resolution of 3840 x 2160 px. The frequency is here limited to 50/60 Hz, unlike that of EX780 which embeds a slab 100/120 Hz. The 40EX700 is also content with a Quad Core processor for image processing, while higher-end models opt for the Panasonic Studio Color HCX2 home processor. It is still compatible with the HDR10 and the HLG (HDR standard chosen for television). For this model, Panasonic announces a fluidity index of 1600 Hz, an expanded color space and a modular foot to meet all expectations. The Panasonic TX-40EX700E is sold around 650 €. It is also available in 50 and 58 inch versions at the respective rates of € 750 and € 1,000.

We are in the presence of a slab VA. It provides good contrast, at the expense of narrower viewing angles than on an IPS panel. On this model, we found a loss of brightness of up to 72% at 45 ° and blacks are also shallower. The screen is brilliant and the antireflection treatment is not really effective; it will therefore be necessary to ensure that the TV is correctly placed in the living room. Fortunately, the phenomenon is less present once the TV is turned on.
The contrast ratio of 5 070: 1 is simply excellent for an LCD model. It allows you to enjoy deep blacks, even in the dark. Panasonic offers by default a dynamic contrast that varies the intensity of the backlight, but it is not useful with this type of slab whose native contrast is already sufficient. We measured the maximum brightness at 356 cd / m² on our white test pattern; a rather limited value to enjoy the HDR.
Cinema Pro mode offers the best rendering. The average delta E is here 3.2. The difference between the theoretical colors and the colors displayed is slightly visible (it is when the delta E is less than 3 that the eye no longer makes the difference) and certain shades, such as blue, cyan or brown- red exceed a delta E of 4.
If the gamma shifts to the reference value (2.2), the curve lacks stability at the beginning of the spectrum, which results in slightly overexposed light gray. 
The temperature curve is stable over the entire spectrum and the average, measured at 6,630 K, is very close to the 6,500 K reference. 

The scaling of Panasonic's Remastering Engine is still as efficient. It allows to display a 1080p image on a Ultra HD panel without distorting the original source, while taking advantage of the increased definition of the slab. We did not find any artefacts with the default settings. 

We measured the persistence time at 16 ms, a fairly average value since the best Ultra HD TVs go down to 12 ms ( Sony KD-65XF9005 ) and the worst ones exceed 20 ms ( Samsung UE40MU6175). Fortunately, the compensation engine implemented by Panasonic works wonders and displays a sharp image in motion, even on this slab 50 Hz. 

In Cinema mode, we measured the delay in display at 105 ms, a very average value , classic for this type of mode. Once the game mode is activated, the display delay increases to 25 ms, a little less than two frames behind the source an excellent score that will be perfect for players, even fans of FPS and nervous games . One of the big advantages of TVs over the competition is the decoupling between the game mode and the chosen display mode. Indeed, it is possible to activate the game mode in any preset, which ensures colorimetry just during the game.

The Panasonic TX-40EX700F uses an Edge Led backlight system, consisting of a single bar at the bottom of the screen. We have not seen any  clouding issues on our test copy, but that does not mean that all models in this reference are immune. Indeed Edge Edge technology is sensitive to shock and the filter can be damaged during transport, which can result in the presence of white spots on a black background.

The homogeneity of the white.
The average difference in uniformity of white over the entire slab is measured at 8%: a good value for a 40-inch model. Remember that the eye perceives a difference when the difference is greater than 20%.

The design of the Panasonic TX-40EX700E is quite classic; the metal outline is quite thin and the reversible aluminum legs can be positioned from here in two different ways, one way or the other. On models 50 and 58 inches, the feet can also be placed in the center of the TV, but it is not possible on the model 40 inches: here, the feet can be positioned only on the sides.

In profile, the Panasonic TV is not necessarily very thick. The size of the TV on the TV stand is in any case dependent on that of the foot. That of the Panasonic TV has a depth of 31.5 cm, which is a lot for a TV of only 40 inches. It is therefore necessary to provide a piece of furniture 40 cm deep. The back of the TV is sober, but not particularly attractive. Fortunately, Panasonic has the good idea to offer caches to hide the connectivity. On the other hand, there is no cable management system.

The connector consists of three HDMI 2.0a ports, two USB 2.0 ports, a USB 3.0 port, an optical digital audio output (S / PDIF), an Ethernet port and a component input (via supplied adapter). The TV also ships Wi-Fi, but it ignores Bluetooth. There is also a DVB-T / T2 / C tuner. The Firefox OS was buried by the Mozilla Foundation, Panasonic has taken over the source code and renamed the operating system "My Home Screen 2.0". Overall, the system remains very close to Firefox OS. It is still colorful and pleasant to use. It does not give pride to apps like Android TV or Tizen but focuses on the essentials. The fluidity is at the rendezvous and navigation, whether in the setting menus or applications, is fast enough. The notification system on the sides is well thought out and this new version allows you to pin favorites on the home page, whether it is a source, an application or a channel. We still find the most popular applications, such as Netflix, YouTube, Arte or Deezer. The media player is doing very well, since it accepts a very large number of file types, including Ultra HD content.

The basic remote control, but effective.
The Panasonic TV TX-58DX700F is supplied with a single remote control, very (maybe even too much) classic. It contains all the settings keys, the numeric keypad for direct access to channels, the choice of sources, direct access to applications or the home screen and essential multimedia keys. It still lacks voice recognition for easy searching, as well as the backlighting of the keys.

Tested in store, this TV could not go through our audio lab, but a brief listening shows that it is no miracle. The sound is far from exceptional, however the two speakers of 10 W deliver a correct sound for TV shows. The voices are well reproduced, but it is necessary to make a cross on the low, the low mediums and even a part of the high of the spectrum. It is best to go through an external system to enjoy a better immersion (sound bar , PC speakers , home theater and even Bluetooth speakers ).

We measured the consumption of the Panasonic TX-40EX700E at 48 W on our test pattern (TV set at 150 cd / m²). The relative consumption is limited to 109 W / m², a value slightly higher than the average consumption of the televisions of our comparative (100 W / m²). A modern TV is expected to now consume less than 100 W / m², like the Sony 65XF9005, which despite its full-LED backlight is only 71 W / m², or the Samsung UE55KS9000, which 72 W / m². Standby power consumption is still below 1 W. Finally, the maximum consumption is 84 W (356 cd / m²).

Our measurements and settings
The best picture quality is obtained in "True Cinema" mode. We adjusted the brightness to 56 to get a white close to 150 cd / m². We then adjusted the gamma to 2.3 in advanced settings (keep gamma at 2.4 for Ultra HD content). One must also think about disabling dynamic contrast control and adaptive backlight control that distorts the gamma curve. The detailed results obtained with these settings:

  1. Real contrast: 5,070: 1
  2. Black: 0.03 cd / m²
  3. Gamma quality: 4/5
  4. Delta E: 3.2
  5. Homogeneity gap of the slab: 8%
  6. Angles of vision: 3.1 / 5
  7. Consumption: 48 W
  8. Media Player: 4.3 / 5

Contrast greater than 5000: 1.
Effective image processing and motion compensation engine.
Nice interface to use.
Reduced display delay.

Loyalty of perfectible colors.
Limited viewing angles.
Only 3 HDMI inputs.

The Panasonic TX-40EX700E is a good TV, although it is still far from the big hours of the Panasonic TX-55CX700E with its 100 Hz panel. However the EX700E does not demerit, offering a good image quality, a very high contrast for an LCD model and flawless image processing.
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