待翻譯：The TCL QM8L proves it's worth the upgrade in our lab testing

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Follow ZDNET: Add us as a preferred source on Google.ZDNET's key takeawaysThe 2026 has much of the same in terms of audio and picture quality as the older model. It is competitively priced compared to high-end rivals from Samsung and Sony. There are plenty of picture and sound modes for a personalized experience. If you're anything like me, when you find a piece of tech you like, you want to replace it with the exact same thing when it's time for an upgrade or something breaks. Or, at least, you want as close to the same thing as you can get. Thankfully, that's easier to do with TVs than it is with other smart devices. For the past few years, each brand's flagship TVs have featured more software-focused upgrades than physical tech innovations. And the which was released in April, splits the difference with a host of both physical and digital features that help it stand out from the 2024 model. But are the new features enough to justify the $700 price increase?Also: We tested 7 TVs for color accuracy and we found two winnersWhen testing TVs in ZDNET's Louisville lab, I not only focus on practicality and visual appeal, but I also test against specific claims brands make about features like color accuracy and screen brightness. At first glance, the differences between the 2024 and 2026 versions of the QM8 might not seem all that significant, but they can make a big difference in how your favorite shows, movies, and video games look, sound, and perform.Looking at what kind of panel each TV uses, it just seems like a lot of letters that don't mean much. However, the QM8L (2026) packs a punch with an impressive display that blows the 2024 model's picture quality out of the water. Model yearScreen sizePanel typeRefresh ratePeak brightnessHDRAudioPrice2024 (TCL QM8K)65 - 98 inchesQD-Mini LED144Hz5,000 nitsDolby VisionDolby Atmos, IMAX Enhanced 2026 (TCL QM8L)65 - 98 inchesSQD-Mini LED144Hz6,000 nitsDolby Vision IQDolby Atmos, Speakers by Bang & Olufsen The Super Quantum Dot (SQD) Mini LED panel strikes a balance between OLED and traditional LED, delivering incredible color accuracy and contrast without sacrificing brightness or risking burn-in. In addition to serving as a buzzworthy marketing term, the Quantum Dot layer is a highly engineered color filter set in front of a refined lighting panel that uses blue LEDs rather than white LEDs to increase the number of colors the display can reproduce. TCL claims the QM8L (2026) can recreate up to 100% of the BT.2020 color spectrum, and our Calman testing achieved an impressively spot-on 99.9% (compared to the QM8K's respectable 90%). Also: TCL QM8 reviewSince Mini LED bulbs are much smaller than traditional ones, more can be packed into the lighting panel. This enables designers and engineers to create tens of thousands of dimming zones to mimic the pixel-level contrast of a high-end OLED. And with so many LEDs, you can get some almost eye-wateringly bright images. The TCL QM8L (2026) has a maximum brightness of 6,000 nits -- that's an almost 20% increase over the QM8K (2024). To put that into perspective, 1 nit is equal to the brightness of a single candle within a square meter of total darkness. The QM8K (2024) would be more like a modern spotlight, and the QM8L (2026) would feel like seeing those annoying blue LED headlights in your rearview mirror. Having peak brightness that high is great for rooms that get a lot of sun exposure during the day, or for commercial spaces with very harsh overhead lighting and direct sunlight. But for a typical living room with a few hours of sun or a couple of lamps, it's a bit much. Thankfully, both models allow you to manually adjust the brightness so you don't accidentally sear your retinas trying to catch up on the news headlines after work or watch a movie in bed.Also: Get better color accuracy on your TV with these simple stepsAnother big difference is that the QM8L (2026) features speakers designed by the high-end audio brand Bang & Olufsen. Known for its premium, often stylized speaker systems and excellent audio quality, Bang & Olufsen paired with TCL seems like a match made in heaven. With Dolby Atmos virtual surround sound, the built-in speakers deliver 3D audio for a more immersive experience. But if you want something more robust, you can easily connect a (also designed by Bang & Olufsen, and annoyingly sold separately) for 3.1.2CH audio in a sleek, modernist package. ZDNET's verdictThe TCL QM8K might be a few years old, but it can still hold its own against both later refreshes and competitors from bigger brands like Samsung and LG. However, it does show its age in a few ways, particularly in color accuracy, brightness, and contrast. You'll still get a great picture for everything from black-and-white Hollywood classics to color-soaked kids' shows and video games.The new ekes out a win for me with its lab-proven 99.9% color accuracy and better brightness, coming in third place for color reproduction out of the seven TVs we extensively tested in the lab. It also has a cleaner, richer sound than its predecessor, with Bang & Olufsen-designed speakers and Dolby Atmos support for virtual surround sound.