TCL P7K / P79K vs Sony BRAVIA 2 II (S25M2)

When it comes to assessing HDR performance, we need to be clear and straightforward without any marketing fluff: the P7K/P79K is not and never was meant to be a champion in this area. The maximum peak brightness that this panel can generate hovers around just 300 nits. This represents a threshold, a sort of thin red line between what can be considered barely satisfactory HDR signal and what is, in reality, only slightly better than standard dynamic range (SDR), unfortunately leaning towards the latter. Synthetic tests confirmed this harsh reality – our measurements taken during movie sessions showed that the luminance in key bright scenes rarely exceeded 200-250 nits. Therefore, this is not a TV that would allow content created in a wide tonal range to truly shine, and that must be openly acknowledged.

Unfortunately, the issue of colour reproduction is presented just as conservatively. Although the manufacturer positions this model within the "QLED" family, owing to the use of a PFS LED filter, the results do not match the heightened expectations. The coverage of the wide DCI-P3 colour gamut reaches only 86%. Compared to the market, this is at best an average result, since most devices that utilise additional layers to expand the colour spectrum easily achieve values at a minimum of 90-92%.

Sony Bravia 2 II isn't a particularly bright TV and unfortunately that's immediately obvious in HDR. In our measurements brightness stayed around 300 to 330 nits, which is far too low for the brightest parts of the image to look truly impactful. In practice HDR here doesn't differ that much from regular SDR. Bright highlights, the sun or lamps are of course visible, but they lack the intensity you'd expect from HDR content. The Bravia 2 II is therefore much better suited to standard SDR material, where its limited brightness will be least noticeable.

Colour gamut coverage

The Sony Bravia 2 II also doesn't impress when it comes to colour. The TV doesn't use any extra gamut-expanding filter, such as the quantum dots found in QLED sets or a PFS phosphor layer. In our measurements it covered about 78% of the DCI-P3 gamut and roughly 57% of the very wide BT.2020. That's definitely too little to deliver truly saturated colours in HDR material. More intense reds, greens or turquoises will simply be less striking than on TVs with an expanded colour gamut. The Bravia 2 II is much better matched to the standard Rec.709 gamut used for films, series and SDR broadcast.

Every reliable assessment of image quality must start with selecting the most optimal, factory preset mode. In the case of the tested P7K/P79K model, the choice was made without hesitation for the "Film" mode. It is the mode that presents an image closest to the intentions of its creators, avoiding both the exaggerated brightness of the dynamic mode and the excessive dimming known from eco settings. And it must be admitted that, for a device in this price range, the factory calibration is surprisingly decent, although it is not without a few stumbles. The most noticeable shortcoming turned out to be the not entirely correctly set white balance. A slight dominance of the blue component gives the image a subtly cool, frosty character, straying from the ideal neutrality that the director intended to show us. The television handles the reproduction of greyscale in the standard dynamic range much better – the gamma curve is almost exemplary. The only slight reservation can be made for the darkest parts of the image, where a delicate deviation from the norm causes a loss of some detail in the shadows. The most significant challenge, however, for the TCL software was interpreting the HDR signal, as illustrated by the EOTF curve. The television follows its own, rather free path here – the darkest details are disproportionately brightened, followed by a noticeable slowdown in brightness increase for mid-tones. Fortunately, most of these imperfections are of a software nature, which can be eliminated. With that thought in mind, we proceeded to the process of professional calibration.

The out-of-the-box colour reproduction in Kino mode was really quite good, at least for ordinary SDR material. The Bravia 2 II had a slight tendency to boost reds, which made some colours lean a bit warmer, at times with a faint pinkish tint. That wasn't a major fault and during normal viewing the picture still looked fairly natural. There was a bit more going on with image brightness. Looking at the gamma curve, Sony doesn't stick perfectly to the reference value. The darkest areas are slightly lifted, while as brightness increases the gamma gradually rises and a large part of the image becomes darker than it should. However, the difference isn't big enough to seriously bother during everyday watching. Overall, SDR straight out of the box performs quite decently.

The situation is much worse in HDR. We've already mentioned the limited colour gamut, but on top of that the Bravia 2 II quite aggressively manipulates image brightness. The EOTF curve sits below the reference for much of the range, which means the TV renders most mid and brighter parts of the scene darker than the source material intends. Only towards the very end of the range does the curve flatten out, as the panel reaches the limits of its capabilities. Combined with a peak brightness of around 300 nits, this gives HDR that not only lacks much punch but can simply look too dark.

The calibration process turned out to be spot on, especially in the context of standard dynamic range (SDR) content. We successfully managed to eliminate the tendency of the television to showcase cool tones, restoring white to its natural neutrality. Moreover, the precise adjustment allowed us to correct a slight error in the gamma curve, enabling the darkest parts of the image to regain proper depth, without any signs of unnatural brightness. The results are measurable and impressive – in the ColorChecker test, the vast majority of colour reproduction errors fell below the perceptual threshold, achieving a deltaE value of below 2. This is a result that more expensive models would not be ashamed of. Unfortunately, in the case of HDR content, we encounter a wall in the form of the panel's structural limitations. And although we managed to bring the colours into line, the software's specifics mean that the television still adapts brightness in its own way, as evidenced by the persistent, non-standard EOTF curve. To summarise, calibration adds tremendous value, but it is important to be aware that it won't overcome certain physical barriers. The slightly elevated blacks, resulting from the lack of local dimming, and limited peak brightness mean that HDR content won't always be able to showcase its full potential. This is simply not the main task of this display; its true strength, especially after professional tuning, lies in viewing SDR material.

Calibration did a lot for the Bravia 2 II, especially with SDR content. Above all, we managed to even out the white balance and tidy up the gamma, which now stays much closer to the reference value. As a result, the image no longer has the earlier pink cast, and the brightness across different areas is much better organised. You can also see it in the colour errors, which after calibration dropped to a very low level (with only minor issues in the most saturated reds).

We also partly managed to rein in the Bravia 2 II in HDR, especially in the way the TV handles image brightness. However, there is one thing no calibration can fix: the panel's capabilities. A narrow colour gamut means the TV physically can't reproduce the most saturated colours recorded in HDR content. On top of that, the low contrast of the IPS panel causes darker scenes to be covered in a grey haze, which robs colours of some of their depth. So we can improve how the Bravia 2 II uses its capabilities, but we can't overcome the panel's inherent limitations.

After a series of harsh evaluations, thankfully, it’s time for some praise, and this is deserved by the TCL AiPQ image processor for its work in the field of digital processing and content scaling. It should be noted right away that we are not talking about the level known from flagship models; nonetheless, in the price segment represented by the P7K/P79K, the results achieved are more than solid. The function that smooths tonal transitions performs particularly well, effectively eliminating posterization, which are the characteristic bands often visible in materials with higher compression, for instance, from choose.tv. The algorithm can elegantly remove unwanted gradients, which ultimately looks really good. The television also handles upscaling competently, which means the task of raising low-resolution materials to 4K standard. The resulting image, although it may seem a bit too sharp out of the box, is fortunately not a problem. The software allows for free adjustment of this parameter using a sharpness slider, allowing the final appearance to be easily tailored to personal preferences.

Upscaling on the Bravia 2 II performs quite well and the TV maintains the standard we've come to expect from Sony. Lower-resolution material is sensibly upscaled to 4K, and the image is slightly smoothed without excessive edge sharpening. It's less successful at dealing with content that shows visible compression artefacts. That's down to the "Digital Noise Reduction" function, which on the "High" setting can smooth some ugly banding. The problem is it does so quite aggressively and, along with the imperfections, removes a lot of fine detail, including natural film grain. What's more, when there's more motion on screen its effectiveness drops considerably and the improvement is minimal. For that reason we generally didn't use this feature for everyday viewing.

The issue of fluidity and sharpness of motion image is inextricably linked to the fundamental parameter of the panel, and in the case of the TCL P7K/P79K, we are dealing with a panel that has a native refresh rate of 60 Hz. This specification at the outset defines its capabilities and makes it hard to unequivocally recommend it to enthusiasts of dynamic sports broadcasts. During quick camera movements, the image loses sharpness, and the panel also shows a slight tendency to smudge, which may be noticeable to more sensitive viewers. Fortunately, not everything in this aspect has been left to chance. The manufacturer has implemented a simple motion smoothing system, which is primarily used in film materials recorded at 24 or 30 frames per second. Thanks to a dedicated slider, the user can decide on the final nature of the motion – from maintaining a fully cinematic, slightly jerky image, to achieving a very smooth, almost theatrical effect. It is a simple yet effective tool that allows one to adjust the viewing experience to their own preferences.

Bravia 2 II uses a 60 Hz panel and, for what it is, handles motion quite well. However, bear in mind it’s an entry-level panel and its limitations are especially noticeable with sports. The TV can’t interpolate 50/60 fps material to a higher refresh rate, so it can’t further improve the sharpness of fast-moving objects. For films and series there’s a conventional motion-smoothing feature that can reduce the judder typical of 24 fps material.

Although on paper the native 4K@60Hz matrix might suggest that the TCL P7K/P79K is not a TV tailored for gamers, the reality turns out to be surprisingly different. On the contrary, the manufacturer has ensured a rich set of features that make it a very friendly companion for next-generation consoles. Onboard, we find key technologies such as ALLM, which provides automatic switching to low-latency mode, and VRR, or variable refresh rate, which eliminates screen tearing. The list is rounded off with support for Dolby Vision Gaming and a simple yet functional Game Bar. However, the real and extremely pleasant surprise is something else. It turns out that the TV effortlessly supports a high refresh rate signal of 120Hz, but at lower resolutions – 1080p and 1440p. This is fantastic news for console owners, who know how rarely games run in native 4K at a full 120 frames per second. The option to choose between higher resolution and doubled smoothness is therefore an incredibly sensible compromise.

In summary, while the P7K/P79K may not be the target screen for the most passionate, tournament gamers, it offers a package of options for casual or occasional console users that is hard to find among many competitors at this price point.

The Bravia 2 II isn’t a TV that’s particularly suited to gaming, and the feature list makes that clear pretty quickly. You basically only get automatic low-latency ALLM and a simple Game Bar where you can view basic signal info and change a few settings. That’s where the positives end. The TV doesn’t support VRR or 120 Hz (not even at lower resolutions) and on top of that it has problems correctly implementing HDR HGIG. It’s fine for occasional console play and, thanks to low input lag, the controls remain responsive, but if you’re after a TV primarily for gaming the Bravia 2 II is a significantly limited choice.