TCL S5 55S551G 55"
TCL’s AIPQ processor drives Motion Rate 240 with MEMC for smooth sports and movies, while Game Accelerator 120 enables 120Hz VRR and auto low-latency mode for responsive gaming. Its high brightness direct LED backlight supports Dolby Vision HDR and is housed in a sleek metal bezel-less design that looks more expensive than it is. This 55-inch 4K TV is best for budget-minded gamers and streamers seeking fluid VRR performance, punchy HDR, and a premium build.
Snapshot
The 30-Second Version
The TCL 55S551G is a bright, feature-packed 4K TV with a best-in-class Google TV smart platform and top-tier HDR support. Picture quality is just average, with no local dimming for deep blacks, but the high brightness makes it great for daytime rooms. It's a killer value if you can find it at the low end of its $114 to $333 price range. Best for streamers who want a brilliant, easy-to-use smart TV, but home theater fans and competitive gamers should look at mini-LED or 120Hz alternatives.
Pros & Cons
Pros
- Excellent smart TV platform with Google TV, ranking in the 98th percentile for smart features. 99th
- Top-tier HDR format support including Dolby Vision and HDR10+, in the 95th percentile. 95th
- High brightness LED backlight makes it great for daytime viewing in bright rooms. 88th
- Snappy performance and a clean, modern interface with Google Assistant built-in. 78th
- Solid value with a price range starting as low as $114 from some vendors.
Cons
- Picture quality is just average, scoring in the 36th percentile with no local dimming for deep blacks.
- Native 60Hz panel limits true 4K 120Hz gaming, despite the "Game Accelerator 120" marketing.
- Audio is a weak spot, with 10W speakers that sound thin and score in the 71st percentile.
- Outdoor visibility is poor, scoring a low 37.9 out of 100, making it a bad choice for patios.
- Wi-Fi 5 instead of the newer Wi-Fi 6 standard, which is a minor but notable omission.
What owners think
The Word on the Street
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The proof
Performance
Let's talk about what that AIPQ processor actually does. It's the brains behind the operation, constantly analyzing the picture to optimize color and contrast. The result is a 4K image that looks crisp and vibrant, especially with native 4K HDR content from Netflix or Disney+. The high brightness LED backlight is the real star here, making the picture pop even in a well-lit room. It's one of the best on the market for combating glare at this price, which is a huge practical win. The Motion Rate 240 with MEMC frame insertion does a decent job smoothing out judder, though purists will probably want to turn it off for movies to avoid the dreaded soap opera effect.
The gaming story is a bit of a mixed bag. TCL markets a "Game Accelerator 120" which is a bit of marketing magic, as the panel itself is a native 60Hz. It achieves a 120Hz VRR signal by dropping the resolution to 1440p or 1080p. For a PS5 or Xbox Series S, this is actually a neat trick that can deliver a smoother experience in performance modes. The Auto Low Latency Mode (ALLM) works instantly, and input lag feels snappy. But a true 4K at 120Hz this is not. The gaming score sits right around average in our database, which perfectly sums it up: it's fine for casual gaming, but a competitive PC gamer will want a higher native refresh rate.
Specifications
Full Specifications
Display
| Size | 55" |
| Resolution | 4K |
| Panel Type | LED |
| Backlight | Direct LED |
| Aspect Ratio | 16:9 |
| Curved | No |
Picture Quality
| Motion Tech | Motion Rate 240 with MEMC Frame Insertion |
| Processor | TCL AIPQ Processor with Deep Learning AI |
HDR
| HDR Formats | Dolby Vision, HDR10+, HDR10, HLG |
| Dolby Vision | Yes |
| HDR10+ | Yes |
| HLG | Yes |
Gaming
| Refresh Rate | 120 Hz |
| VRR | VRR |
| ALLM | Yes |
| Game Mode | Yes |
Smart TV
| Platform | Google TV |
| Voice Assistant | Google Assistant, Alexa |
| Screen Mirroring | AirPlay 2, Chromecast |
| Works With | Amazon Alexa, Google Home, Apple Home |
Audio
| Speaker Config | 2 |
| Wattage | 10 |
| Dolby Atmos | Yes |
| Surround Sound | DTS Virtual:X |
| eARC | Yes |
Connectivity
| HDMI Ports | 3 |
| HDMI Version | 2.1 |
| USB Ports | 1 |
| Wi-Fi | Wi-Fi 5 |
| Bluetooth | 5 |
| Ethernet | Yes |
| Optical Audio | No |
| VESA Mount | 300x300 |
Power & Size
| Power | 262 |
| Energy Star | Yes |
| Annual Energy | 262 |
| Weight | 10.5 kg / 23.2 lbs |
vs Competition
The TCL S5's most direct rival is the Hisense U6 Series. The Hisense typically uses a mini-LED backlight with full-array local dimming, which gives it a massive advantage in contrast and black levels. If you watch a lot of movies in a dark room, the Hisense is the better picture quality pick, hands down. The TCL fights back with a brighter overall panel and, in our opinion, a much cleaner and more responsive smart TV interface with Google TV. It's a classic software versus hardware showdown.
Stepping up to something like the Sony BRAVIA 3 K65S30 gets you Sony's superb picture processing and better motion handling for sports, but you'll pay a significant premium. The LG QNED 82 series is another step up, offering a 120Hz panel for real 4K 120Hz gaming, but again, at a higher cost. The TCL S5's sweet spot is for the buyer who prioritizes a bright screen and a top-notch smart experience over absolute picture quality. If you can live with average contrast, it's a smarter buy than paying extra for a Sony or LG with a similarly basic LED panel.
| Spec | TCL S5 55S551G 55" | Sony BRAVIA 9 K85XR90 | Samsung Neo QLED QN900F | LG OLED evo AI 4K G5 Series OLED97G5WUA | Hisense U7 Series 75U75QG | Roku Pro Series 65R8C5 |
|---|---|---|---|---|---|---|
| Screen Size | 55 | 85 | 85 | 97 | 75 | 65 |
| Resolution | 4K | 3840x2160 | 7680x4320 | 3840x2160 | 4K | 3840x2160 |
| Panel Type | LED | Mini-LED | Mini-LED | OLED | Mini-LED | Mini-LED |
| Refresh Rate | 120 | 120 | 120 | 120 | 165 | 120 |
| Hdr | Dolby Vision, HDR10+, HDR10, HLG | HDR 10, Hybrid Log-Gamma (HLG), Dolby Vision | HDR10, HDR10+, HLG | HDR10, Dolby Vision, HLG | Dolby Vision, HDR 10+, HDR 10, Hybrid Log-Gamma (HLG) | Dolby Vision, HDR 10+, Hybrid Log-Gamma (HLG) |
| Smart Platform | Google TV | Google TV | Tizen | webOS | Google TV | Roku TV |
| Dolby Vision | true | true | false | true | true | true |
| Dolby Atmos | true | true | true | true | true | true |
| Hdmi Version | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 | 2.1 |
| Compare | Compare | Compare | Compare | Compare |
| Product | Hdr | Audio | Smart | Gaming | Display | Connectivity | Social Proof | Picture Quality |
|---|---|---|---|---|---|---|---|---|
| TCL S5 55S551G 55" | 95.1 | 77.3 | 99.1 | 78.4 | 22.6 | 69.5 | 88.1 | 36 |
| Sony BRAVIA 9 K85XR90 Compare | 76.3 | 96.6 | 92 | 78.4 | 94.2 | 93 | 88.1 | 79.1 |
| Samsung Neo QLED QN900F Compare | 93.5 | 98.9 | 77.4 | 88.1 | 99.7 | 96.7 | 99.9 | 93.5 |
| LG OLED evo AI 4K G5 Series OLED97G5WUA Compare | 96.6 | 99.9 | 78.2 | 88.1 | 98.7 | 83.6 | 77 | 96.5 |
| Hisense U7 Series 75U75QG Compare | 91.1 | 93.4 | 95.9 | 94.8 | 49.2 | 96.7 | 88.1 | 97.7 |
| Roku Pro Series 65R8C5 Compare | 76.3 | 84.5 | 85.2 | 88.1 | 84.2 | 93 | 94.6 | 36 |
Price
Value & Pricing
Pricing on this set is all over the map, with a spread of $219 between the lowest and highest vendors we track. At the low end around $114, this TV is an absolute steal. You're getting a feature set, especially in smart and HDR capabilities, that rivals sets costing twice as much. At the higher end near $333, the value proposition gets a little shaky, as you start bumping into the territory of competitors with better picture quality like the Hisense U6 Series with its mini-LED backlight.
For the best deal, you'll want to shop around. The price match guarantee at Best Buy is a good safety net, but if you can snag it from a vendor at the bottom of that price range, the price-to-performance ratio for a smart, bright 55-inch 4K TV is hard to beat. You're essentially paying for a fantastic smart platform and a very bright screen, and getting a perfectly decent picture for everyday use thrown in for free.
Read more
Overview
The TCL S5-Series 55S551G is a 55-inch 4K TV that punches way above its weight class in smart features and HDR support, landing in the 98th and 95th percentiles respectively in our database. That's a fancy way of saying the Google TV interface is snappy and it handles basically every HDR format you can throw at it, including Dolby Vision. For a budget-friendly set, that's a genuinely impressive combo. It's clearly designed for someone who wants a modern, connected TV experience without spending a fortune, and who mostly watches in a living room or bedroom, not a sun-drenched patio.
But here's the thing: the picture quality itself is solidly middle-of-the-pack. The display and raw picture quality scores sit in the 18th and 36th percentiles, which means you're not getting the deep blacks of a pricier QLED or OLED. What you are getting is a very bright LED backlight that TCL pairs with some clever processing tricks. The AIPQ processor and Motion Rate 240 tech work hard to clean up motion and upscale content, making sports and fast-paced shows look smoother than you'd expect from a 60Hz panel. It's a classic case of software trying to make up for hardware, and for the most part, it works.
This TV is a smart choice for a very specific person: the cord-cutter who lives in the Google ecosystem, wants a bright picture for daytime viewing, and occasionally fires up a game console but isn't chasing 120fps. The built-in Google TV, Assistant, and Apple AirPlay 2 cover all the streaming bases. Just don't expect it to be a home theater hero in a pitch-black room. That's not what this is, and that's okay.
Common Questions
Q: Can this TV actually do 120Hz for gaming?
It's a bit of marketing trickery. The panel itself is a native 60Hz display. The "Game Accelerator 120" feature allows the TV to accept a 120Hz signal, but it does so by dropping the resolution to 1440p or 1080p. So you can get a smoother 120fps experience, but not in full 4K. For a PS5 or Xbox Series S, this is a nice bonus for performance modes, but a true 4K 120Hz TV will cost significantly more.
Q: How is the sound quality without a soundbar?
It's a weak spot. The 2.0 channel, 10W speakers are adequate for news and casual sitcoms, but they lack bass and can sound thin with movies or games. It does support Dolby Atmos decoding and has an eARC port, so it's ready to pass high-quality audio to a soundbar or receiver. For a better experience, most people will want to budget for at least an entry-level soundbar.
Q: Is this a good TV for a bright room?
Yes, this is actually one of its main strengths. The high brightness LED backlight is designed to produce a brilliant picture even in rooms with a lot of ambient light. It handles reflections well and doesn't look washed out during daytime viewing, making it a great pick for a living room with lots of windows.
Q: What's the difference between this and the Hisense U6?
The main difference is the backlight technology. The Hisense U6 Series uses a mini-LED backlight with full-array local dimming, which gives it much better contrast and deeper blacks, making it superior for dark-room movie watching. The TCL S5 counters with a brighter overall panel and a smoother, more polished Google TV smart interface. You're choosing between better picture quality (Hisense) and a better smart experience with higher brightness (TCL).
Who Should Skip This
Home theater fans who love watching movies in a dark room should definitely skip this one. The direct LED backlight without local dimming means black bars on widescreen movies will glow gray, and shadow detail gets muddy. You'll be much happier with a set that has full-array local dimming, like the Hisense U6 Series, which will give you that contrast and pop you're looking for.
Competitive gamers chasing the highest frame rates should also look elsewhere. While the VRR and ALLM features are nice, the 60Hz panel is a bottleneck. If you have a gaming PC or a PS5 and want to play at a true 4K 120fps, you'll need to step up to a TV with a native 120Hz panel, such as the LG QNED 82 series or a higher-end TCL QM7 model. This set is for casual gaming, not topping leaderboards.
Verdict
For the everyday streamer, the TCL 55S551G is an easy recommendation. It's a brilliant choice for a bright living room or bedroom where you'll be watching a mix of cable news, Netflix sitcoms, and YouTube. The Google TV interface is the best in the business, and the high brightness means you won't be squinting during daytime viewing. It's a hassle-free, smart-first TV that just works, and at the right price, it's a fantastic value.
For the home theater enthusiast or serious gamer, we'd steer you elsewhere. The lack of local dimming means movie night in a dark room will look a bit washed out, with grayish blacks instead of inky ones. And while the gaming features are a nice bonus, a true 120Hz panel from a set like the LG QNED will provide a noticeably smoother and more detailed gaming experience. This TCL is a jack of all smart trades, but a master of none when it comes to raw picture performance.