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LG UA75 vs TCL S551F

Product A: LG

UA75

56 of 159 known
Change LG UA75

Compare the TCL S551F with

Product B: TCL

S551F

67 of 159 known
Change TCL S551F

Compare the LG UA75 with

48 of 151 fields differ

Download CSVDownload JSON
  • 22 different values
  • 26 known for one only
  • 23 the same
  • 80 missing for both

Refresh rate per resolution

The best rate over any port. Bars run from 0 to 360 Hz.

3840 × 2160Native for both
A60Hz
B60Hz

Size, drawn to scale

Front and side, on their stands.

Weight

0 to 40 kg

Weight with stand
A11.6kg
B9.21kg
Weight without stand
A11.5kg
B8.98kg

All 159 fields

Every value links to where we found it.

ALG UA75
BTCL S551F

General

5 of 9 differ
Series
UA751Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Page title: 55 inch LG UHD AI UA75 4K Smart TV 2025. The comparison table lists UA75 sizes 86, 75, 65, 55, 50 and 43.
S Class1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TCL S Class, S5 Class page. Model row TCL S Class - S551F.
Model numbers
43UA7500ZUA, 50UA7500ZUA, 55UA7500ZUA, 65UA7500ZUA1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Model 43UA7500ZUA, 50UA7500ZUA, 55UA7500ZUA, 65UA7500ZUA, one page per size. The 75 and 86 inch models are not covered.
43S551F, 50S551F, 55S551F, 65S551F, 75S551F1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Size selector 43, 50, 55, 65 and 75 inch, with model rows 43S551F to 75S551F. The Google TV S5 (S551G) is a separate product and is not stored. The 2025 S571G and F35 are also separate.
GTIN / EAN
195174111062, 1951741110865Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026General: UPC 195174111062 for the 55 inch US model. The LG Canada EAN for 55UA7500ZUA is 195174113196 and is not stored.6Retailer pagethetvoutlet.com/products/lg-65-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026General: UPC 195174111086 for the 65 inch US model
846042090926, 8460420909029Retailer pageamazon.com/dp/B0D4PD799HRead 23 October 2026Item details: Model Number 55S551F, UPC 846042090926, Model Year 2024, 3,908 ratings.10Retailer pageamazon.com/dp/B0D4P1T8RVRead 23 October 2026Item details: Model Number 75S551F, UPC 846042090902.
Announced
Not available
Not available
Status
Available1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Product page ACTIVE and listed for sale on LG Canada. US retailers sell the same model numbers.
Available1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026The 55 inch and 75 inch Amazon listings are live on 2026-10-23. No source says the line is discontinued.
Predecessor
Not available
Not available
Successor
Not available
Not available
Launch price (US)
Not available
$449.991Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Suggested Price on the TCL US page: 43 inch 349.99, 50 inch 399.99, 55 inch 449.99, 65 inch 599.99 and 75 inch 899.99 USD. These are list prices, not the sale prices shown on later captures. Excluding tax.
Launch price (EU)
Not available
Not available
Markets
US, CA1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026LG Canada sells 43UA7500ZUA to 86UA7500ZUA. The ZUA model code is also the US code, see the US dealer page.5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026US dealer lists SKU 55UA7500ZUA-OB with a US UPC and a US one year warranty. LG US sells the series as 55UA7500ZUA.AUS.
US1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TCL US store page and US warranty text.
Colours
Not available
Black9Retailer pageamazon.com/dp/B0D4PD799HRead 23 October 2026Item details: Color Black.
Segment
Standard1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Entry 4K UHD line, not an art or outdoor TV.
Standard1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Budget 4K line.
Model year
20251Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Page: 2025 in the model name and the comparison table
20241Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026AFTVnews and the Amazon item details give 2024. The TCL page is marked New Model on 2024-06-06.

Display

2 of 7 differ
Screen size class
55in(139.7 cm)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 202655 inch reference page
55in(139.7 cm)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026The 55 inch is the reference size. Its Amazon listing has 3,908 ratings and ranks #23 in Smart TVs.
Sizes covered
43, 50, 55, 65in1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Covered sizes 43, 50, 55 and 65. The 75 and 86 inch models state Bluetooth v5.1 and two USB ports, while 43 to 65 inch state Bluetooth v5.0 and one USB port. Those fields are not per size, so 75 and 86 are left out. LG says its Slim Design applies to 65, 55, 50 and 43 inch.
43, 50, 55, 65, 75in1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Size selector 43, 50, 55, 65 and 75 inch. The 98 inch S550G and the S551G are separate models.8Press articleaftvnews.com/tcl-reveals-its-new-s5-and-q6-4k-fire-tvs-for-2024-the-first-with-fire-os-8-and-a-new-remoteRead 23 October 2026Available in 43, 50, 55, 65 and 75 inch.
Viewable size
Not available
54.6in(138.7 cm)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Viewable Display Size 54.6 inch for the 55 inch. The other sizes read 42.5, 49.5, 64.5 and 74.5 inch on their own pages.
Native resolution
3840 × 2160px1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026
3840 × 2160px1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Resolution 4K Ultra HD (3840 x 2160).
Pixel density (size class)
80.1ppi
80.1ppi
Screen surface
Not available
Not available
Anti-reflection coating
Not available
Not available

Panel

1 of 14 differ
Display type
LED1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Display Type: 4K UHD with Backlight Type: Direct. An LCD with an LED backlight and no quantum dot or mini LED claim.
LED1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Listed as 4K UHD HDR LED Smart TV with Fire TV. LED Type Direct LED. No quantum dot layer is named.
Display type (as published)
4K UHD1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Spec table: Display Type: 4K UHD
LED1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Page title: 4K UHD HDR LED Smart TV with Fire TV.
Panel type
Not available
Not available
Backlight
Direct-lit LED1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Backlight Type: Direct
Direct-lit LED1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Backlight Type High Brightness LED Backlight, LED Type Direct LED. No local dimming is stated.
Local dimming
Not available
Not available
Local dimming zones
Not available
Not available
Panel maker
Not available
Not available
Panel generation
Not available
Not available
Subpixel layout
Not available
Not available
Native colour depth
Not available
Not available
Native panel refresh rate
60Hz1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Refresh Rate: 60Hz Native
60Hz1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Panel Refresh 60Hz. Motion Rate 240 is a processing claim, not the panel rate.
DCI-P3 coverage (claimed)
Not available
Not available
Rec. 2020 coverage (claimed)
Not available
Not available
Peak HDR brightness (claimed)
Not available
Not available

HDR and picture

5 of 8 differ
HDR formats
HDR10, HLG1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026HDR (High Dynamic Range): HDR10 / HLG. HDR10 Pro is LG marketing for HDR10 processing and is not stored as a separate format.
Dolby Vision, HDR10, HDR10+, HLG1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026High Dynamic Range (HDR) Format HDR PRO+ (Dolby Vision, HDR10+, HDR10, HLG).8Press articleaftvnews.com/tcl-reveals-its-new-s5-and-q6-4k-fire-tvs-for-2024-the-first-with-fire-os-8-and-a-new-remoteRead 23 October 2026Dolby Vision, HDR10, HLG and HDR10+. HDR10+ is new over the 2023 S4.
Filmmaker Mode
Yes1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026FILMMAKER MODE: Yes. The comparison table shows plain FILMMAKER MODE for UA75, not Ambient FILMMAKER MODE.
Not available
HGiG
Yes1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026HGIG Mode: Yes
Not available
Picture processor
α7 AI Processor 4K Gen81Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Picture Processor: α7 AI Processor 4K Gen8
Not available
Motion interpolation
Not available
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Motion Enhancement Technology: Motion Rate 240 with MEMC Frame Insertion.
Black frame insertion
Not available
Not available
Ambient light sensor
Not available
Not available
Calibration software
Not available
Not available

Motion and gaming

2 of 10 differ
Maximum accepted refresh rate per resolution and input
ALG UA75
Maximum accepted refresh rate per resolution and input. The top rate is in bold.
ResolutionHDMI
3840 × 2160Native60Hz
Source1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Refresh Rate: 60Hz Native. 120Hz Native (VRR 120Hz): Yes (Up to 60Hz). So 4K accepts up to 60 Hz. HDMI version not stored because LG sources disagree.
BTCL S551F
Maximum accepted refresh rate per resolution and input. The top rate is in bold.
ResolutionHDMI
3840 × 2160Native60Hz
Source1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Only 3840 x 2160 at 60 Hz over HDMI is stored. The quick start guide lists HDMI signals up to 2160p at 24, 30 and 60 Hz, and the panel is 60 Hz. The overview text also mentions Game Accelerator 120 with up to 120 Hz VRR, which cannot apply to a 60 Hz panel and appears on the S551G, so no VRR is stored.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Page 1 HDMI signal compatibility: 2160p/24/30/60Hz.
Maximum accepted refresh rate
60Hz
60Hz
Maximum accepted refresh rate at 4K
60Hz
60Hz
Adaptive sync
HDMI VRR1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026VRR: Yes (Up to 60Hz) in the spec table. The US dealer copy of LG text also names FreeSync, which is not in the LG Canada table.
Not available
VRR range per input
Not available
Not available
Low framerate compensation
Not available
Not available
Dolby Vision gaming
Not available
Not available
Auto game mode (ALLM)
Yes1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026ALLM (Auto Low Latency Mode): Yes
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Auto Game Mode (ALLM) in the feature list.
Game menu features
Game Optimizer, Game Dashboard1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Game Optimizer: Yes (Game Dashboard)
Not available
Input lag (claimed)
Not available
Not available

Measured

None of 25 known
Input lag (measured)
Not available
Not available
Input lag at 4K 60 Hz (measured)
Not available
Not available
Input lag at 4K 120 Hz (measured)
Not available
Not available
Input lag at 4K 144 Hz (measured)
Not available
Not available
SDR brightness in a real scene (measured)
Not available
Not available
HDR brightness in a real scene (measured)
Not available
Not available
HDR brightness per window (measured)
Not available
Not available
HDR peak brightness (measured)
Not available
Not available
Full-screen HDR brightness (measured)
Not available
Not available
Contrast ratio (measured)
Not available
Not available
Contrast with local dimming (measured)
Not available
Not available
Infinite contrast (measured)
Not available
Not available
DCI-P3 coverage (measured)
Not available
Not available
Rec. 2020 coverage (measured)
Not available
Not available
Colour volume at 1,000 nits (measured)
Not available
Not available
Colour volume at 10,000 nits (measured)
Not available
Not available
Colour accuracy (measured Delta E)
Not available
Not available
Gray uniformity deviation (measured)
Not available
Not available
Colour shift angle (measured)
Not available
Not available
Reflections (measured)
Not available
Not available
Total pixel response time (measured)
Not available
Not available
PWM flicker frequency (measured)
Not available
Not available
VRR range (measured)
Not available
Not available
4:4:4 chroma (measured)
Not available
Not available
Power use SDR (measured)
Not available
Not available

Smart platform

6 of 12 differ
Smart platform
webOS1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Operating System (OS): webOS 25
Fire TV1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Smart TV Fire TV. Fire TV Smart OS with Voice Remote.
OS at launch
webOS 251Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Operating System (OS): webOS 25
Fire OS 88Press articleaftvnews.com/tcl-reveals-its-new-s5-and-q6-4k-fire-tvs-for-2024-the-first-with-fire-os-8-and-a-new-remoteRead 23 October 2026The 2024 TCL Fire TVs are the first smart TVs to run Fire OS 8, which is Android 11 based.
Latest OS
Not available
Not available
OS upgrade support period
Not available
Not available
Chipset
Not available
MediaTek MT90268Press articleaftvnews.com/tcl-reveals-its-new-s5-and-q6-4k-fire-tvs-for-2024-the-first-with-fire-os-8-and-a-new-remoteRead 23 October 2026Amazon lists all of these TVs with a quad-core MediaTek MT9026 at 1.53 GHz and a Mali-G52 2EE GPU. The figure comes from Amazon's listing as reported by AFTVnews. RAM and storage are not reported.
RAM
Not available
Not available
Total internal storage
Not available
Not available
Voice assistants
Not available
Alexa6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Step 2 and Step 3: Voice Remote with Alexa, with a microphone and voice button.9Retailer pageamazon.com/dp/B0D4PD799HRead 23 October 2026Title: Alexa Built-in with Voice Remote.
Hands-free microphone
Not available
Not available
Casting
AirPlay 2, Chromecast built-in1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Works with Apple Airplay: Yes. Google Cast: Yes. The comparison table: Apple Airplay 2 and Google Cast: Yes.5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026Works with Apple Airplay2: Yes. Google Cast built-in: Yes.
AirPlay 21Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Casting Apple Airplay2. Google Cast is not listed.9Retailer pageamazon.com/dp/B0D4PD799HRead 23 October 2026Title: Apple AirPlay 2 Compatibility.
Smart home
Matter, HomeKit, Google Home, Alexa, ThinQ1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Google Home / Hub: Yes. LG ThinQ: Yes. Works with Apple Home: Yes. Matter and Alexa from the US dealer copy of the LG spec table.5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026Matter: Yes. Works with Amazon Alexa: Yes. Works with Apple Home: Yes. Works with Hey Google: Yes. ThinQ Smart Technology: Yes. Dealer copy of the LG US spec table.
Alexa1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Works With Amazon Alexa.
Art or ambient mode
Not available
Not available

Tuners

1 of 6 differ
Tuners
ATSC 1.0, Clear QAM, Analog1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Analog TV Reception: Yes. Digital TV Reception: ATSC1.0 (Terrestrial), QAM (Cable). QAM is stored as Clear QAM.
ATSC 1.0, Analog, Clear QAM1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Tuner Type ATSC, NTSC, Clear QAM. The ATSC version is not stated, so atsc_1 follows the schema rule for a plain ATSC tuner, and NTSC is stored as analog.
Tuners per broadcast standard
Not available
Not available
Antenna inputs
ALG UA75
TypeCount
Terrestrial and cable1
Source1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026RF Input (Antenna/Cable): 1ea
BTCL S551F
TypeCount
Terrestrial and cable1
Source1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026RF Input (NTSC, ATSC) 1.
CI+ slot
Not available
Not available
Record to USB
Not available
Not available
Broadcast platforms
Not available
Not available

Audio

6 of 9 differ
Physical speaker channels
2.01Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Speaker System: 2.0 channel
2.01Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Audio Power (Watts) Speakers 20W (2 x 10W), so a stereo pair.
Physical speaker drivers
Not available
21Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 202620W (2 x 10W) for 43 to 65 inch and 30W (2 x 15W) for the 75 inch, so two drivers.
Total built-in speaker power
20W1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Audio Output: 20W
20W1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Audio Power (Watts) Speakers 20W (2 x 10W) for the 55 inch. The 75 inch reads 30W (2 x 15W).
Built-in subwoofer
Not available
Not available
Up-firing speakers
No1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Speaker Direction: Down Firing
Not available
Audio formats
AC-4, Dolby Digital, Dolby Digital Plus, HE-AAC, AAC, MP2, MP3, PCM1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Audio Codec: AC4, AC3(Dolby Digital), EAC3, HE-AAC, AAC, MP2, MP3, PCM, apt-X. AC3 is Dolby Digital and EAC3 is Dolby Digital Plus. apt-X is a Bluetooth codec and is not stored. Dolby Atmos: No in the comparison table.
Dolby Atmos, Dolby Digital Plus1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Dolby Processing: Dolby Atmos, Dolby Digital+.
eARC passthrough
Not available
Dolby Atmos (Dolby Digital Plus), DTS1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Audio Passthrough: Dolby Atmos, Dolby Digital+, Dolby Digital, DTS, PCM. The port is not named, so only the Atmos in Dolby Digital+ and DTS entries that map to the schema options are stored.
Audio features
α7 AI Sound Pro (Virtual 9.1.2 Up-mix), WOW Orchestra, LG Sound Sync, Clear Voice Pro, Bluetooth Surround Ready1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Audio section: AI Sound α7 AI Sound Pro (Virtual 9.1.2 Up-mix), WOW Orchestra, LG Sound Sync, Clear Voice Pro, Bluetooth Surround Ready (2 Way Playback). Virtual up-mix is processing, not drivers.
DTS Virtual:X, Enhanced Dialogue Mode1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026DTS Virtual:X Yes. Enhanced Dialogue Mode in the feature list. Audio Effect presets Standard, Music, Movie, Clear Voice, Enhanced Bass.
Bluetooth headphones
Not available
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Feature list: Bluetooth Personal Audio.

Connectivity

6 of 14 differ
Video inputs
ALG UA75
TypePortCountMax refresh rate at 4K (Hz)eARC
HDMIHDMI 1160Not available
HDMIHDMI 2160Yes
HDMIHDMI 3160Not available
Source1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026HDMI Input: 3ea (supports eARC, ALLM). HDMI Audio Return Channel: eARC (HDMI 2). The comparison table says HDMI 2.0 - 3ea, but LG US marketing text says three HDMI 2.1 ports, so the version is left out. The 4K rate follows the 60Hz native panel.
BTCL S551F
TypePortCountMax refresh rate at 4K (Hz)eARC
HDMIHDMI 1-3360No
HDMIHDMI 4 (e)ARC160Yes
CompositeAV IN (adapter, not included)1Not availableNot available
Source1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026The spec text says 3 HDMI (1 with eARC) and one AV input, composite video with left and right audio on an adapter jack. The quick start guide and TCL's own ports photo both show four HDMI ports, HDMI 1 to 3 and HDMI 4 marked (e)ARC, and Amazon lists 4 HDMI ports, so four are stored. HDMI revision and bandwidth are not published.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Step 4, page 8 diagram for 43/50/55/65 inch and for 75 inch: HDMI 1, HDMI 2, HDMI 3, (e)ARC HDMI 4, ANT/CABLE, AV IN adapter, headphone, optical. HDMI signal compatibility on page 1: 480i, 480p, 720p/60Hz, 1080i/60Hz, 1080p/60Hz, 2160p/24/30/60Hz. The AV IN needs an adapter that is not included.7Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/55s551f/55S551F-Ports.pngRead 23 October 2026TCL's own ports photo for the 55S551F shows USB 2.0, HDMI 1, HDMI 2, HDMI 3, HDMI 4 marked (e)ARC, cable and antenna, AV IN adapter, headphone and optical. Four HDMI sockets are visible. The same photo is on Amazon's gallery.11Maker product pagem.media-amazon.com/images/I/61r1mHaKMTL._AC_SL1500_.jpgRead 23 October 2026TCL's rear panel photo in the Amazon gallery for the 55S551F: USB 2.0, HDMI 1, HDMI 2, HDMI 3, HDMI 4 (e)ARC, antenna and cable, AV IN adapter, headphone, optical.
HDMI ports
3
4
HDMI ports with 4K 120 Hz
0
0
Highest HDMI version
Not available
Not available
Maximum HDMI link bandwidth
Not available
Not available
HDMI features
ALLM, VRR, eARC, CEC1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026HDMI Input: supports eARC, ALLM. VRR: Yes. Simplink (HDMI CEC): Yes5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026HDMI Input: 3ea (supports eARC, ALLM). Simplink (HDMI CEC): Yes
ALLM, eARC1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026HDMI Audio Return Channel (e)ARC and Auto Game Mode (ALLM). CEC is not listed.
USB peripheral ports
ALG UA75
USB versionCount
2.01
Source1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026USB Input: 1ea (v 2.0) on 43 to 65 inch. Connector type not published.5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026USB Input: 1ea (v 2.0)
BTCL S551F
ConnectorUSB versionCount
USB-A2.01
Source1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026USB 1 x USB 2.0 for 43 to 65 inch. The 75 inch page says 2 x USB 2.0.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Page 8: one USB 2.0 port on the 43 to 65 inch drawing and two USB 2.0 ports on the 75 inch drawing, each marked 5V 0.5A. The port shape is a USB-A socket in TCL's ports photo.7Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/55s551f/55S551F-Ports.pngRead 23 October 2026Photo: one USB 2.0 type A socket marked 5V 0.5A.
Ethernet speed
Not available
Not available
Wi-Fi
Wi-Fi 51Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Wi-Fi: Yes (Wi-Fi 5)
Wi-Fi 51Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Wi-Fi 5 (802.11ac).
Wi-Fi bands
Not available
Not available
Bluetooth
5.01Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Bluetooth Support: Yes (v 5.0) for 43, 50, 55 and 65 inch. The comparison table gives v5.1 for 75 and 86 inch.5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026Bluetooth Support: Yes (v 5.0)
5.01Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Bluetooth 5.0.
Optical out
Yes1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026SPDIF (Optical Digital Audio Out): 1ea
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026SPDIF Digital Audio Optical 1.7Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/55s551f/55S551F-Ports.pngRead 23 October 2026Photo: OPTICAL AUDIO OUT socket.
Headphone out
Not available
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Headphone Output 1.7Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/55s551f/55S551F-Ports.pngRead 23 October 2026Photo: headphone socket.
Included connection box
Not available
None6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Step 4: every port is on the TV. The guide lists no external box.

Remote

3 of 5 differ
Remote control
Yes1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Accessories Included: Remote: Standard Remote
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026What's in the Box: Remote Control, Voice Remote.
Remote connection
Not available
Not available
Remote power
Not available
AAA batteries6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026What's in the box: 2 x AAA batteries for remote.
Voice button on remote
Not available
Yes1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Easy Voice Control Yes, Voice Remote. The quick start guide calls it the Voice Remote with Alexa, with a microphone and a voice button.
Pointer remote
No1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Magic Remote Control: Ready (requires Magic Remote). The included remote is the Standard Remote.
Not available

Stand and mounting

4 of 9 differ
Stand
Feet1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Stand (WxD): 1086 x 230 mm for 55 inch. Two-foot stand.
Feet6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Step 1: align the stands with the screw holes and secure them with four screws. The 75 inch screws are in the stand bag.
Stand installation positions
Not available
Not available
Stand height adjustment
Not available
Not available
Space under the screen
Not available
Not available
Distance between feet
Not available
Not available
Stand footprint
Width1,086Depth230mm(42.8 × 9.1 in)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Stand (WxD) per size2Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/43ua7500zuaRead 15 October 2026TV Stand (WxD): 892 x 200 mm3Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/50ua7500zuaRead 15 October 2026TV Stand (WxD): 941 x 230 mm4Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/65ua7500zuaRead 15 October 2026TV Stand (WxD): 1217 x 269 mm
Not available
VESA mount
Not available
200 x 2001Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026VESA Wall Mount Pattern 200 x 200 for 43 to 65 inch and 300 x 300 for the 75 inch.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Models of 43, 50, 55 and 65: VESA 200x200. Models of 75: VESA 300x300.
VESA screw
Not available
M61Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Screw Size M6 x 12 for 43 to 65 inch and M6 x 16 for the 75 inch.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 20264 M6x12mm screws for 43 to 65 inch and 4 M6x16mm screws for the 75 inch.
Wall mount included
Not available
No1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026The quick start guide says wall mount hardware and accessories are not included.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Optional - To mount on a wall (Wall mount hardware and accessories are not included).

OLED care

None of 3 known
OLED care
Not available
Not available
Burn-in covered by warranty
Not available
Not available
Burn-in warranty length
Not available
Not available

Dimensions and weight

4 of 5 differ
Dimensions with stand
Width1,236Height780Depth230mm(48.7 × 30.7 × 9.1 in)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Dimensions with Stand (WxHxD), mm2Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/43ua7500zuaRead 15 October 2026968 x 621 x 200 mm3Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/50ua7500zuaRead 15 October 20261122 x 718 x 230 mm4Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/65ua7500zuaRead 15 October 20261455 x 904 x 269 mm
Width1,226.82Height749.3Depth254mm(48.3 × 29.5 × 10 in)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TV with Stand (WxHxD) 48.3 x 29.5 x 10.0 inch, converted exactly.
Dimensions without stand
Width1,236Height718Depth67.9mm(48.7 × 28.3 × 2.7 in)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Dimensions without Stand (WxHxD), mm2Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/43ua7500zuaRead 15 October 2026968 x 567 x 67.9 mm3Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/50ua7500zuaRead 15 October 20261122 x 654 x 67.9 mm4Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/65ua7500zuaRead 15 October 20261455 x 841 x 67.9 mm
Width1,226.82Height711.2Depth71.12mm(48.3 × 28 × 2.8 in)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TV without Stand (WxHxD) 48.3 x 28.0 x 2.8 inch, converted exactly.
Thinnest depth
Not available
Not available
Weight with stand
11.6kg(25.6 lb)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Weight with Stand, kg2Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/43ua7500zuaRead 15 October 20267.4 kg3Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/50ua7500zuaRead 15 October 20269.5 kg4Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/65ua7500zuaRead 15 October 202616.7 kg
9.21kg(20.3 lb)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TV Weight with Stand 20.3 lbs, converted to 9.21 kg.
Weight without stand
11.5kg(25.4 lb)1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026TV Weight without Stand, kg2Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/43ua7500zuaRead 15 October 20267.3 kg3Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/50ua7500zuaRead 15 October 20269.4 kg4Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/65ua7500zuaRead 15 October 202616.5 kg
8.98kg(19.8 lb)1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026TV Weight without Stand 19.8 lbs, converted to 8.98 kg.

Power

1 of 10 differ
Power supply
Not available
Internal6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026Step 2: connect the power cable to the TV and the wall outlet. There is no adapter.
On-mode power in SDR (EU label)
Not available
Not available
On-mode power in HDR (EU label)
Not available
Not available
Maximum operating power
Not available
Not available
Standby power
0.5W1Maker product pagelg.com/ca_en/tv-soundbars/4k-uhd-tvs/55ua7500zuaRead 15 October 2026Standby Power Consumption: Under 0.5W
0.5W1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Standby Power < 0.5W. Published as less than 0.5 W.
Networked standby
Not available
Not available
EU energy class SDR
Not available
Not available
EU energy class HDR
Not available
Not available
Energy per 1000 h SDR
Not available
Not available
Energy per 1000 h HDR
Not available
Not available

Certifications

1 of 3 differ
Picture certifications
Not available
Not available
ENERGY STAR
Not available
No1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026Energy Star No.
Other certifications
Not available
Not available

In the box

1 of 1 differ
In the box
Stand, Remote, Remote control battery, Power cable, Quick Start Guide, E-Manual5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026Accessories Included: E-Manual, Power Cable, Quick Start Guide, Remote, Remote Control Battery, Stand
TCL TV, TV stands, 4 x stand screws, Power cable, Voice Remote, 2 x AAA batteries, Quick Start Guide, Warranty information1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 2026What's in the Box: Quick Start Guide, Power Cord 1, Remote Control Voice Remote, Remote Control Batteries 2 x AAA, Warranty Info. The TV, stands and four stand screws come from the quick start guide.6Owner's manualweb.archive.org/web/20250523063402/https://www.tcl.com/usca/content/dam/tcl/product/home-theater/s-class/documents/S551F%20QSG.pdfRead 23 October 2026What's in the box: TCL TV, TV stands, 4 x stand screws, power cable, TV remote, 2 x AAA batteries.

Warranty

0 of 1 differ
Manufacturer warranty (source market)
1year5Retailer pagethetvoutlet.com/products/lg-55-inch-class-lg-uhd-ai-ua75-4k-smart-tv-2025Read 15 October 2026Warranty: Limited Warranty - 1 Year Parts & Labor (US)
1year1Maker product pageweb.archive.org/web/20240606185411/https://www.tcl.com/us/en/products/home-theater/s5-class/55-class-4k-uhd-hdr-led-smart-fire-tv-55s551fRead 23 October 20261 year limited manufacturer's warranty.

Both are also in the API. Back to all TVs.