Hisense E7Q / E79Q vs TCL C8L / QM8L

Hisense E7Q / E79Q is a television with average brightness, whose peak luminance level is around 350-380 nits. This is an absolute minimum that allows for watching HDR content in a way that is close to the creators' intentions, although without a clear "wow" effect. The results of synthetic tests on white images have been confirmed in practice – in movie scenes, the bright parts of the image are stable and fairly uniform, but it is hard to speak of a true "lighting impact" here. In everyday use, for example, while watching Netflix or YouTube, the HDR effect is acceptable and is completely sufficient for most users. However, it must be stated clearly – this is not the level of top screens, and one should not expect that at this price point. Fortunately, the Hisense E7Q / E79Q has an advantage that allows it to gain quite a few points: it is a PFS LED QLED panel, utilizing an additional phosphor layer that improves color reproduction. The measured range of the DCI-P3 palette is around 92%, which means that the colors in most scenes are vibrant, well-saturated, and pleasing to the eye, especially for this price range.

In terms of HDR, the TCL C8L turns out to be a hellishly bright television – and I mean literally. On a synthetic chart of 5%, our measuring equipment indicated a result exceeding 4500 nits. This is a result that is downright cosmic, considering that reference director monitors, which we often refer to in our materials, typically operate around 4000 nits. Does this mean that the C8L breaks barriers and climbs to the technological peak of Mini-LED? Not exactly. Dry synthetic tests are one thing, and real movie images are another. In real, varied scenes, the C8L achieves a peak of around 1600 nits. This is still a very good result, ensuring a very high level of HDR dynamics, but also clearly lower than what the manufacturer boasts in the specifications. The trouble starts with very small flashes of light – then brightness can drastically drop to around 600 nits. The algorithm tries at all costs to maintain deep black and minimize halo effect, but it does so at the expense of HDR impact. This is perfect evidence that laboratory charts rarely correspond to what we ultimately see on the screen.

Huge applause is due for color reproduction, all thanks to the new generation of SQD (Super Quantum Dot) quantum dots. The coverage of the DCI-P3 palette reaches 97%, but the true jaw-dropper is the measurement of the extremely demanding BT.2020 space. The C8L achieves as much as 90% in it, placing it alongside today's top screens that boast RGB backlighting. Importantly, unlike some screens with Micro/Mini RGB backlighting, this effect is stable regardless of the scene displayed. Of course, one must remember that content mastered for such a wide gamut in films or series is still a rarity. However, the mere fact that the panel has such a "color reserve" deserves immense admiration.

In Filmmaker mode, the Hisense E7Q / E79Q television was able to really surprise positively. Even after the first measurements, it turned out that the white balance is quite well calibrated, and the only minor deviation was a slight tendency toward a purple hue, which we mentioned earlier. However, this did not significantly affect the overall character of the image – it remained coherent and pleasant to perceive. A much larger problem turned out to be the brightness characteristics (gamma) in SDR content and the EOTF curve in HDR films. The television clearly brightened the image, flattening the contrast and taking away its depth. Gamma values could drop from the reference 2.4 down to about 1.9, making the image appear as if it were covered with a thin, milky layer. Fortunately, this is a problem that can be relatively easily corrected through calibration.

We tested the TCL C8L in the best factory picture mode available in this TV’s menu for image fidelity. That, of course, is Filmmaker Mode, which appeared in this brand’s software relatively recently (a year ago in the "K" series). Thanks to it, an average user can get a pretty good color reproduction straight out of the box, although it is certainly not a perfectly tuned mode. Looking at the factory white balance of our unit, both in SDR and HDR material, the red component was clearly lacking, which made the image noticeably cooler and caused a slight shift toward bluish-green tints. The issue of brightness management is also ambiguous, as we mentioned earlier. While for SDR content the gamma linearity is actually correct and holds steadily at the reference value of 2.4, in HDR things look much worse. Tracking the EOTF curve clearly shows the TV has a significantly boosted brightness across the range, which can make the final image overly bright and inconsistent with the creators’ intent, and that in a mode that by definition should avoid that. Of course, like every sample in our lab, this one also underwent professional calibration, and its results are shown below.

The biggest beneficiary of calibration for the Hisense E7Q / E79Q turned out to be the SDR mode without a doubt. It managed to achieve nearly perfect picture quality – most errors in the Color Checker test dropped below a value of 3, and often even below 2, which is a remarkable result for this class of equipment. The greatest improvement came from aligning the brightness characteristic (gamma), making the picture no longer look washed out and regaining its natural depth. In HDR content, colors were also improved, and the purple tint we mentioned earlier was eliminated, but errors in the Color Checker measurements were still noticeable. This is due to the fact that – as is often the case with Hisense televisions – the screen manipulates brightness quite strongly, oversaturating some colors. This was also indicated by the EOTF curve, which was slightly above the reference values, suggesting these minor problems with excessive brightening. Despite this flaw and the construction limitations that arise with HDR content, the Hisense E7Q / E79Q gained a lot after calibration. In everyday use, the television presents a cohesive, natural, and pleasant-to-the-eye picture, and the difference compared to factory settings is truly vast.

As you can see, the results of a professional calibration of the TCL C8L are really promising, thanks to the extensive adjustment tools the manufacturer put at our disposal in the menu. Above all, we were able to completely correct the white balance — we eliminated the red deficiency, so the image finally stopped drifting toward unwanted cool tones. After that adjustment, errors in the ColorChecker test fell to near-reference levels, regularly landing below a Delta E of 2, which is below the threshold of human perception.

If the test patterns look this perfect, you might ask: why then the lower final score in this category? The answer lies in the brightness management discussed earlier. Although the menu includes sliders that let you precisely straighten the EOTF curve on synthetic signals, when confronted with actual movie material (I recommend enabling the EOTF filter when watching movies), you can see that in most scenarios the TV still reacts to HDR metadata its own way. As a result, the picture can be slightly over-brightened and not faithful to the creators' intent, and it was precisely this lack of consistency with real films that cost the C8L a few points.

In the case of Hisense E7Q / E79Q, upscaling and digital image processing are not the strongest features of this television. It is clear that the manufacturer opted for simplicity rather than advanced image processing algorithms. The television does not offer any functions for smoothing tonal transitions or systems for improving image clarity, which means that lower resolution materials simply look very raw. On the screen, subtle compression edges can be noticed, which better processors in other models can effectively hide.

During tests of HD materials, we noticed that the E7Q tries to artificially enhance detail, which sometimes works and sometimes has the opposite effect – the image becomes soft, slightly smeared, at times even "watery." There is no aggressive sharpening that ruins naturalness, but there is also no finesse in detailing that better image processors offer.

This year the C8 series and higher models received probably the biggest and most anticipated upgrade in TCL’s history, and it specifically concerns digital image processing. The C8L is the lowest-end model in the manufacturer's lineup to be equipped with the latest flagship chip, the MediaTek Pentonic 800 (listed in the menu as MT9655). Thanks to its processing power, the feature called "Gradual Smoothing" finally works as it should. The algorithm effectively eliminates unwanted posterization (ugly tonal transitions/color banding), doing so intelligently enough that it does not degrade the sharpness of other details.

The processor also handles upscaling lower-resolution content to 4K very well. Although evaluating this element can be mostly academic, because the differences between today's TVs in this class are very subtle. The most important takeaway is that TCL finally has nothing to be ashamed of compared to the competition.

Hisense E7Q / E79Q is a television with a 60 Hz screen, so 4K sports fans may feel a slight disappointment – we simply won't see such smooth images here as in more expensive models with higher refresh rates. Fortunately, when it comes to movies, the situation is much better. Cinematic materials recorded at 24 frames per second can be displayed here using a motion smoothing feature, allowing the user to adjust the image to their preferences – more cinematic with a visible frame or smoother, in a theatrical style.

The TCL C8L is equipped with a fast panel that has a native 144 Hz refresh rate. That spec will be most appreciated by demanding PC gamers, while most users, who rely on consoles or TV broadcasts, will use a steady 120 Hz. It is at 120 Hz that motion processing algorithms handle image rendering for movies, series, and sports. In the TV’s menu you’ll find a "Motion Clarity" option that lets you adjust the motion smoothing to your preferences. The algorithms handle cinematic material at 24 or 30 frames per second (fps) as well as dynamic sports broadcasts at 50 or 60 fps, maintaining appropriate smoothness.

Hisense E7Q / E79Q is truly a successful television for gamers, even though it doesn't support 4K signal at 120 Hz. However, the manufacturer has included a set of features that until recently could only be found in more expensive models. There is ALLM, or automatic switching to low-latency mode, which allows the television to activate game mode with very low input lag. We also have VRR, functioning up to 60 Hz – this may not seem impressive on paper, but in practice, it is fully sufficient, as most games on consoles do not exceed this limit. All these settings can be quickly found in the Game Bar panel, a convenient menu created specifically for gamers. From this level, you can change picture modes, turn on a frame rate counter, or even… a crosshair on the screen – in the Vidaa system humorously named "target point," which is a result of awkward translation by the Chinese manufacturer.

Particularly praiseworthy is the ability to play in 1080p at 120 Hz, which realistically improves the smoothness and responsiveness of the image. This way, if someone wants to play a few titles at a higher refresh rate, they can simply lower the resolution and enjoy significantly smoother motion. Despite the lack of 4K@120Hz, Hisense E7Q / E79Q really performs well as a television for gamers – especially those who are not looking for perfection, but a solid and fast screen for everyday gaming.

For gamers – especially for those with powerful PCs and several consoles at the same time – the TCL C8L is a true beast. It’s the first model in the manufacturer’s lineup equipped with four full HDMI 2.1 ports with a maximum bandwidth of 48 Gbps. This is directly thanks to the new Pentonic 800 processor we wrote about earlier. Additionally, the TV seamlessly supports virtually every gaming feature. It has an automatic game mode (ALLM) that reduces latency to minimal levels and full frame synchronization (VRR) operating in an impressive range of up to 288 Hz. We’re also talking about standards like G-Sync or FreeSync from Nvidia and AMD. When it comes to image display standards, there are also no compromises: the C8L offers complete support for HDR formats in games, including gaming Dolby Vision and the HGiG profile. All of these features can be conveniently managed from a very readable game bar (Game Bar), which we can customize according to our preferences. From a purely gaming perspective, there really isn’t anything to complain about in the C8L – well, maybe aside from the previously mentioned slight ghosting. But other than that? It’s an unflawed machine for gamers.