TCL 55S517 55-Inch 4K Roku Smart TV

TCL 55S517 55-Inch 4K Roku Smart TV — image 1
TCL 55S517 55-Inch 4K Roku Smart TV — image 2
TCL 55S517 55-Inch 4K Roku Smart TV — image 3
73%
27%
91%
Value for Money
77%
Picture Quality
89%
Smart TV Platform
82%
Gaming Performance
54%
Viewing Angles
67%
Build Quality
58%
Remote Control
61%
Audio Quality
63%
Wi-Fi Reliability
86%
Setup & Installation
78%
Connectivity Options
74%
Motion Handling
72%
Long-Term Durability
More

Overview

The TCL 55S517 55-Inch 4K Roku Smart TV arrived in 2018 as one of the more compelling budget 4K options on the market, and it still holds up reasonably well for buyers who find it at a reduced price today. It won't compete with high-end OLED panels, and it doesn't pretend to. What it delivers is a genuinely capable picture for the money, paired with one of the strongest smart TV platforms available in Roku. If you're upgrading from an older 1080p set and want 4K without overspending, this 55-inch 4K set makes a clear, honest case for itself.

Features & Benefits

Dolby Vision HDR is the headline spec here, and it does make a visible difference in compatible content — colors read richer and dark scenes carry more depth than standard HDR. That said, the 55S517 lacks local dimming zones, so blacks won't look as deep as they do on premium displays. The dedicated game mode is a legitimate highlight: input lag drops low enough that casual gaming feels responsive. Roku's OS remains one of the cleanest smart TV interfaces around, with a huge app library and reliable software updates. Three HDMI 2.0 ports, an optical audio output, and a headphone jack round out a surprisingly complete package.

Best For

This TCL Roku TV is a natural fit for anyone making their first move into 4K and unwilling to overspend. Cord-cutters who live inside streaming apps will appreciate Roku's deep integration — setup is quick, and jumping between Netflix, Hulu, or the platform's thousands of other channels takes almost no effort. Casual gamers benefit from the low-lag game mode without needing a dedicated gaming display. It also works well as a secondary room TV — a bedroom or basement setup where you want a big, capable screen but don't require reference-grade image quality. Less ideal for home theater purists who demand perfect black levels.

User Feedback

Owners consistently highlight how much picture quality they get at this price point — Dolby Vision content draws real praise, even from buyers who weren't expecting much. Roku's interface earns near-universal approval, particularly from less tech-savvy users who find competing smart TV systems confusing. On the downside, viewing angles are a known weakness: the LED panel loses saturation and contrast noticeably when watched from the side. Some buyers flag the remote as feeling flimsy, and a handful report inconsistent Wi-Fi performance. Long-term owners — those who've had the set two or three years — generally find it holds up, though software support may eventually slow as the hardware ages.

#LED & LCD TVs
#Televisions
#Television & Video
#Electronics

Pros

  • Dolby Vision HDR delivers noticeably richer colors and better contrast on compatible streaming content.
  • Roku's smart platform is one of the easiest and most reliable interfaces available on any TV at this price.
  • The dedicated game mode keeps input lag low enough for casual gaming to feel genuinely responsive.
  • Three HDMI 2.0 ports cover most living room setups without requiring an external switcher.
  • At 55 inches, this 4K set offers a lot of screen real estate for the money.
  • The optical audio output and headphone jack give you practical flexibility for soundbar or headphone use.
  • 120Hz refresh rate helps sports and fast-motion content look smoother than entry-level 60Hz panels.
  • Setup is quick and straightforward — Roku walks new users through the process with minimal friction.
  • Long-term owners report the hardware holds up reliably after two or more years of regular use.

Cons

  • No local dimming means black levels look washed out compared to OLED or premium LED displays.
  • Viewing angles are a real weakness — picture quality degrades noticeably when watched from the side.
  • The included remote feels plasticky and cheap relative to what competitors bundle at a similar price.
  • Wi-Fi connectivity has been inconsistent for some owners, occasionally requiring reconnections or router restarts.
  • As a 2018 model, future software and app support may become limited over time.
  • Built-in speakers are underwhelming and will likely push most buyers toward an external audio solution.
  • The 55S517 lacks Contrast Control Zones, so HDR performance falls short of what the spec suggests on paper.
  • USB port count is limited to a single 2.0 connection, which restricts local media playback options.

Ratings

Our AI-driven score for the TCL 55S517 55-Inch 4K Roku Smart TV was built by analyzing thousands of verified owner reviews worldwide, with spam, bot-generated, and incentivized feedback actively filtered out before any scoring took place. The result is a transparent picture of where this 55-inch 4K set genuinely excels and where real buyers have run into frustrations. Both sides of that story are reflected honestly in the categories below.

Value for Money
91%
This is consistently the category owners rave about most. Buyers upgrading from aging 1080p sets are routinely impressed by how much screen and smart functionality they get at this price tier — Dolby Vision support in particular feels like a feature that belongs on a pricier display.
A small segment of buyers who paid closer to full retail at launch feel the value equation has shifted as newer budget competitors have entered the market. At a discounted or used price the score holds; at full MSRP it is less clear-cut against current alternatives.
Picture Quality
77%
23%
For streaming Dolby Vision content — Netflix originals, Disney Plus HDR titles — color saturation and highlight brightness are noticeably better than what most buyers expected at this price. Daytime viewing with natural light in the room is where this panel looks its best.
The absence of local dimming zones is a real limitation: dark cinematic scenes in a dim room reveal cloudy, greyish blacks rather than deep contrast. Buyers who watch a lot of late-night movies or dark TV dramas will feel this gap compared to even modestly more expensive QLED panels.
Smart TV Platform
89%
Roku OS is one of the few smart TV platforms that users across all age groups consistently praise. The interface is clean, search works across multiple apps simultaneously, and the channel store covers virtually every major and niche streaming service available.
A handful of owners note that the home screen shows promoted content and ads in the Roku feed, which some find intrusive. The platform also lacks a built-in web browser, which is a minor but recurring complaint from users who want that flexibility.
Gaming Performance
82%
18%
Casual and mid-level console gamers report a genuinely responsive experience once game mode is enabled. PS4 and Xbox One owners in particular note that the input lag feels comparable to displays marketed specifically for gaming, which is a meaningful win at this price.
Hardcore or competitive gamers will notice that this is not a true gaming monitor replacement — VRR and ALLM are absent, and the panel's response time is adequate rather than fast. For fighting games or first-person shooters at a competitive level, the limitations become apparent.
Viewing Angles
54%
46%
For a single viewer seated directly in front of the screen, the image looks solid and colors stay accurate within a reasonable center zone. Buyers who use this as a personal bedroom TV — watching from one fixed position — rarely complain about this aspect.
This is the most consistent pain point across owner feedback. Anyone watching from more than about 30 degrees off-center notices a meaningful drop in color vibrancy and contrast. Households with wide seating arrangements or open-plan rooms where people watch from multiple angles find this frustrating in daily use.
Build Quality
67%
33%
The overall chassis and stand feel adequate for a budget-tier TV — the panel itself sits firmly once assembled, and most owners report no structural issues after years of regular use. At 32 lbs the set is easy to wall-mount solo if needed.
The plastic finish on the bezel and stand does not look or feel premium up close, and a portion of owners describe the construction as noticeably thin compared to brand-name competitors. A few buyers also report minor wobbling on the included stand on softer surfaces.
Remote Control
58%
42%
The Roku RC580 remote keeps things simple — the button layout is intuitive and the dedicated streaming shortcut buttons are genuinely useful for daily cord-cutting habits. Less tech-savvy buyers appreciate not being overwhelmed by unnecessary buttons.
Build quality is a recurring complaint: the remote feels lightweight and hollow, and a segment of buyers report button registration issues or early failure after moderate use. The absence of a built-in microphone for voice search is also a frustration for buyers expecting that feature.
Audio Quality
61%
39%
For casual daytime TV watching — news, sitcoms, talk shows — the built-in speakers are adequate and dialogue clarity is reasonably good at moderate volumes. The optical output and headphone jack make it easy to route audio to better hardware when needed.
Buyers who watch action films or listen to music through the TV are consistently underwhelmed — the speakers lack bass entirely and sound thin at higher volumes. Most owners who care about audio end up connecting a soundbar fairly quickly, treating the built-in speakers as a stopgap.
Wi-Fi Reliability
63%
37%
The majority of owners report stable Wi-Fi performance in typical home network conditions — streaming 4K Roku content without buffering issues is the common experience for users with reasonably modern routers.
A meaningful subset of buyers document recurring disconnection issues, particularly with dual-band routers or networks with multiple connected devices. The built-in Ethernet port is a practical fallback, but buyers who prefer wireless-only setups have found the Wi-Fi inconsistency annoying enough to flag in reviews.
Setup & Installation
86%
Roku's guided setup process is one of the smoothest in the smart TV space — even buyers with limited tech experience describe getting the 55S517 up and running within 20 minutes. On-screen prompts handle network connection, app installation, and basic picture setup clearly.
Wall mounting requires purchasing a separate VESA-compatible bracket, which some buyers overlook when ordering. A small number of owners also report that the initial Roku account registration step, while brief, feels mandatory in a way that some privacy-conscious buyers find off-putting.
Connectivity Options
78%
22%
Three HDMI 2.0 ports cover the typical living room setup — a console, a streaming stick, and a cable box or Blu-ray player can all stay connected simultaneously without swapping cables. The ARC-enabled port simplifies soundbar wiring meaningfully.
Only one USB port limits local media playback flexibility, and there is no USB 3.0 for faster file access. Buyers coming from higher-end TVs may also miss the absence of Bluetooth, which prevents direct wireless headphone pairing.
Motion Handling
74%
26%
Sports viewers and action movie fans notice a real improvement over standard 60Hz budget TVs — fast pans and quick camera cuts look cleaner and more defined. Live sports in particular benefit from the smoother motion cadence during crowded-scene action.
Motion interpolation artifacts can appear on some content, and purists who prefer a natural film cadence may want to spend time in the picture settings to dial this in. The improvement over 60Hz is real but not always as dramatic as the spec sheet implies in everyday content.
Long-Term Durability
72%
28%
Owners who have lived with the 55-inch 4K set for two to three years generally report no major hardware degradation — the panel brightness holds, and the Roku OS continues to receive updates that keep the interface feeling current.
A small but notable number of owners document backlight issues emerging after 18 to 24 months of heavy daily use. Given the 2018 model year, buyers should also factor in that software support will eventually plateau as TCL focuses development resources on newer hardware generations.

Suitable for:

The TCL 55S517 55-Inch 4K Roku Smart TV is a strong match for buyers who want a large, capable screen without committing to a premium budget. First-time 4K upgraders will find the jump in picture clarity genuinely satisfying, especially on streaming content that supports Dolby Vision. Cord-cutters will feel right at home with Roku's clean interface, which makes navigating hundreds of apps far less frustrating than most competing smart TV platforms. Casual gamers who don't want to invest in a dedicated gaming monitor will appreciate the dedicated low-lag game mode, which keeps responsiveness solid for everyday titles. This 55-inch 4K set also makes an excellent secondary TV — think a well-used bedroom, a den, or a finished basement where you want real screen presence without fussing over reference-grade picture quality.

Not suitable for:

The TCL 55S517 55-Inch 4K Roku Smart TV is not the right call for buyers who prioritize cinematic picture quality above all else. Without local dimming zones, the panel cannot produce the deep, inky blacks that OLED or premium QLED displays deliver, which becomes obvious during dark movie scenes in a dim room. Home theater enthusiasts who spend time calibrating color accuracy and contrast ratios will hit the ceiling of what this LED panel can offer fairly quickly. Viewers who often watch from wide seating angles — think a broad sectional sofa — will notice color and contrast degradation that more expensive IPS or OLED panels handle far better. Given its 2018 model year, buyers expecting long-term firmware support or future-proofed connectivity features may also want to consider a more recent release.

Specifications

  • Screen Size: The panel measures 55 inches diagonally, providing a wide viewing area suited to most living rooms and larger bedrooms.
  • Resolution: 4K Ultra HD resolution (3840 x 2160 pixels) delivers four times the pixel density of a standard 1080p display.
  • Display Type: LED-backlit LCD panel with a 16:9 aspect ratio and a flat screen design.
  • HDR Support: Dolby Vision HDR is supported, enabling improved color volume and dynamic range on compatible streaming content.
  • Refresh Rate: Native 120Hz refresh rate helps reduce motion blur during fast-moving content like sports and action films.
  • Smart Platform: Runs Roku TV OS, providing access to thousands of streaming channels and a straightforward channel management interface.
  • HDMI Ports: Three HDMI 2.0 ports are included, one of which supports ARC (Audio Return Channel) for simplified soundbar connectivity.
  • USB Port: One USB 2.0 port allows playback of locally stored media files such as photos, music, and video.
  • Audio Output: Includes one SPDIF digital optical audio output and one 3.5mm headphone jack for flexible audio routing.
  • Connectivity: Built-in Wi-Fi and a rear Ethernet port provide both wireless and wired network connection options.
  • Other Inputs: One composite AV input (with L/R audio), one RF antenna input supporting NTSC and ATSC signals for over-the-air reception.
  • Game Mode: A dedicated game mode reduces input lag, making the TV more responsive for console and casual gaming use.
  • Dimensions: With stand, the set measures 48.3″ wide, 30″ tall, and 10.6″ deep; without stand it is 3″ deep.
  • Weight: The TV weighs approximately 32 lbs without the stand and 33 lbs with it attached.
  • Included Items: Package includes the TV, a Roku remote (RC580) with two AAA batteries, and a quick-start guide.
  • Power Supply: The unit is designed for standard AC power and does not require an external power brick.
  • Model Year: Released in 2018, this is a first-generation 5 Series model and carries model number 55S517.
  • Local Dimming: Contrast Control Zones (local dimming) is not included on this model, which limits deep black performance in dark scenes.

Related Reviews

TCL 55S425 55-inch 4K Roku Smart TV
TCL 55S425 55-inch 4K Roku Smart TV
73%
74%
Picture Quality
89%
Value for Money
91%
Smart Platform (Roku)
93%
Ease of Setup
51%
Audio Performance
More
TCL 55R617 55-Inch Roku Smart LED TV
TCL 55R617 55-Inch Roku Smart LED TV
73%
78%
Picture Quality
71%
Local Dimming
91%
Smart Platform
84%
Value for Money
67%
Motion Handling
More
Roku Select Series 55-Inch 4K Smart TV
Roku Select Series 55-Inch 4K Smart TV
79%
93%
Smart TV Interface
91%
Setup Experience
74%
Picture Quality
88%
Remote Control
86%
Value for Money
More
TCL 55QM751G 55-Inch QLED 4K Smart TV
TCL 55QM751G 55-Inch QLED 4K Smart TV
88%
93%
Display Quality
88%
Gaming Performance
91%
Picture Brightness
83%
Sound Quality
86%
User Interface
More
TCL 55S403 55-inch 4K Roku TV
TCL 55S403 55-inch 4K Roku TV
72%
74%
Picture Quality
91%
Smart TV Platform
88%
Value for Money
41%
Audio Performance
89%
Streaming & Content Access
More
TCL 55-Inch Q6 QLED 4K TV
TCL 55-Inch Q6 QLED 4K TV
73%
78%
Picture Quality
83%
Gaming Performance
74%
Smart TV Experience
69%
Motion Handling
81%
Value for Money
More
TCL 43S425 43-Inch 4K UHD Smart Roku LED TV
TCL 43S425 43-Inch 4K UHD Smart Roku LED TV
83%
91%
Value for Money
88%
Picture Quality
94%
Ease of Setup
85%
Voice Control Functionality
82%
Connectivity
More
TCL 50S455 50-Inch 4K UHD HDR Smart Roku TV
TCL 50S455 50-Inch 4K UHD HDR Smart Roku TV
85%
88%
Picture Quality
92%
Value for Money
90%
Smart Features & Streaming
65%
Audio Quality
91%
Ease of Setup
More
TCL 75S425 75-inch 4K UHD HDR Smart Roku TV
TCL 75S425 75-inch 4K UHD HDR Smart Roku TV
83%
90%
Picture Quality
88%
Ease of Setup
91%
Streaming Experience
65%
Sound Quality
84%
Build Quality
More
TCL 75-inch Class 4-Series 4K UHD HDR Smart Roku TV 75S435
TCL 75-inch Class 4-Series 4K UHD HDR Smart Roku TV 75S435
82%
91%
Value for Money
88%
Display Quality
92%
Ease of Setup
85%
Smart Features and Connectivity
60%
Sound Quality
More

FAQ

Not at all. Roku TV walks you through the setup process step by step on screen, and most people have it connected to their Wi-Fi and streaming within 15 to 20 minutes. You do not need a cable or satellite subscription to get started — just a Wi-Fi network.

Yes, both Netflix and Disney Plus are available through the Roku platform, along with hundreds of other streaming apps including Hulu, Amazon Prime Video, Apple TV, and HBO Max. The Roku channel store is one of the most comprehensive available on any smart TV.

It is genuinely visible on supported content — colors look richer and highlights have more pop compared to standard HDR or SDR sources. That said, keep in mind there are no local dimming zones on this panel, so black levels in dark scenes are not as impressive as they would be on a higher-end display. It is good HDR for the price, just not reference-class.

Yes, the dedicated game mode brings input lag down to a level that works well for casual and mid-level gaming on consoles like the PS4, Xbox One, or Nintendo Switch. It is not a pro-grade gaming display, but for everyday gaming it is quite responsive and avoids the sluggishness you sometimes find on budget TVs.

This is one of the more common complaints about this model. The LED panel loses noticeable saturation and contrast when viewed from the side, which can be a problem if your sofa wraps around or if multiple people watch from different angles. It is best suited for viewers sitting relatively straight on to the screen.

Yes, and there are two practical ways to do it. The HDMI ARC port lets you connect a compatible soundbar with a single HDMI cable, handling both audio and control. Alternatively, the optical audio output works with virtually any soundbar that has a TOSLINK input.

No, this model does not include Bluetooth. However, it does have a 3.5mm headphone jack on the back if you want private listening with wired headphones. Roku also has a mobile app with a private listening feature that streams audio through your phone if you prefer a wireless workaround.

It can be a solid buy at the right price. Long-term owners generally report the hardware holds up well after two to three years of regular use. The main consideration is future software support — older Roku TV models can eventually stop receiving updates, though Roku has historically maintained support longer than most competing platforms.

The 55-inch 4K set comes with a selection of popular Roku channels pre-loaded, including The Roku Channel, Netflix, and a few others. You can add or remove any channel easily from the Roku Channel Store, and the home screen is straightforward to customize to your preferences.

The included RC580 remote does not have a built-in microphone for voice search. If you want voice control, you can use the free Roku mobile app on your phone, which does support voice search, or pair a compatible Alexa or Google Home device to control certain TV functions by voice.