Sony 77" BRAVIA XR K-77XR8B – 4K OLED Smart Google TV
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Sony 77" BRAVIA XR K-77XR8B – 4K OLED Smart Google TV
Overview
The Sony BRAVIA XR8B (K-77XR8B) is a 77-inch 4K OLED Google TV built around Sony's Cognitive Processor XR, giving you the deep, self-lit blacks OLED is known for at a larger and more accessible size than Sony's flagship QD-OLED models.
Acoustic Surface Audio+ turns the screen itself into the speaker, so dialogue and effects feel like they're coming directly from the action rather than a soundbar below the picture, with Dolby Atmos and DTS:X passthrough for a connected home theatre setup.
It runs Google TV with Google Assistant and Amazon Alexa compatibility, Apple AirPlay 2 and Apple HomeKit, and PS5-specific gaming features across its HDMI 2.1 inputs.
Simcoe Audio Video Insight
In our Ontario service area, 77 inches is the sweet spot for a lot of dedicated theatre rooms, and the XR8B is how we get people into that size on OLED without stepping up to full QD-OLED pricing. Sony's XR processing is what keeps a screen this size looking sharp with everyday HD content, not just native 4K.
Best for the Sony K-77XR8B: pair it with a tilting wall mount. OLED viewing angles are excellent, but a slight downward tilt helps keep floor-lamp and window reflections off those black levels.
More Info
Why the Sony BRAVIA XR8B Stands Out
77-Inch Self-Lit OLED Panel
Over 8 million self-lit pixels deliver true black and near-infinite contrast, with no backlight blooming in dark scenes.
Cognitive Processor XR
Analyzes scenes the way the human eye and ear do, prioritizing focal points so textures, faces, and dialogue come through more naturally.
Acoustic Surface Audio+
Uses actuators behind the panel to turn the screen into the speaker, so sound tracks with on-screen action instead of coming from below it.
Dolby Vision, Dolby Atmos, and DTS:X
Full support for Dolby Vision HDR alongside Dolby Atmos and DTS:X audio passthrough for movies, streaming, and games.
Google TV with Google Assistant and Alexa
Browse apps and streaming services in one place, control hands-free with Google Assistant or a connected Amazon Alexa device, and cast easily with Chromecast built-in.
PS5-Ready HDMI 2.1 Gaming
4K/120fps, VRR, and Auto Low Latency Mode across its HDMI 2.1 inputs, with Auto HDR Tone Mapping and Auto Genre Picture Mode built specifically around PS5.
Buyer's Guide
Who It's For
- The Value-Conscious Cinephile: Anyone who wants a large-format OLED without paying flagship QD-OLED pricing.
- Dark-Room Viewers: A strong fit for a basement theatre or blackout-curtain room where OLED's contrast really shows.
- PS5 Owners: Gamers who want a big screen that automatically optimizes HDR and picture mode for their console.
How It Compares
The XR8B is Sony's value-focused route into large-format OLED. Stepping up to the BRAVIA 8 II gets you Sony's newer QD-OLED panel with higher brightness and colour volume, though it's currently limited to 55" and 65" sizes rather than the XR8B's 77-inch option.
Sony 77" BRAVIA XR K-77XR8B – 4K OLED Smart Google TV Specifications
| General Information | |
|---|---|
| Model Name | K77XR8B |
| Release Year | 2025 |
| Display Type | OLED |
| Operating System | Google TV (Android TV) |
| Processor | Cognitive Processor XR |
| Display | |
| Screen Sizes Available | 77″ |
| Resolution | 3840 × 2160 (4K UHD) |
| HDR Support | HDR10, Dolby Vision, HLG |
| Refresh Rate | 120 Hz |
| Variable Refresh Rate (VRR) | Yes |
| Auto Low Latency Mode (ALLM) | Yes (HDMI 1/2/3/4) |
| Viewing Angle | 178° / 178° |
| Contrast | Near Infinite (Self-Lit Pixels) |
| Video | |
| Video Processor | Cognitive Processor XR |
| Picture Modes | Vivid, Standard, Cinema, Professional, Calm, Photo, IMAX Enhanced, Game Modes |
| Upscaling | XR Clear Image |
| Motion Enhancement | XR OLED Motion, Auto Mode |
| Color Enhancement | Live Colour Technology |
| Audio | |
| Speaker Type | Acoustic Surface Audio+ with Sound Positioning Tweeter |
| Audio Power Output | 13W + 13W + 10W + 10W + 10W |
| Dolby Audio Support | Dolby Audio, Dolby Atmos |
| DTS Audio Support | DTS Digital Surround, DTS:X, DTS Express |
| Connectivity | |
| HDMI Inputs | 4 × HDMI 2.1 (4K120/eARC/VRR/ALLM) |
| USB Ports | 2 × USB |
| Ethernet Port | 1 × RJ45 |
| Wi-Fi | Wi-Fi 6 (802.11ax) |
| Bluetooth | Bluetooth 5.3 |
| Audio Output | 1 × Optical Digital (TOSLINK) |
| HDCP Support | Yes (HDCP 2.3) |
| Features | |
| Smart TV Platform | Google TV |
| Voice Assistants | Google Assistant, Amazon Alexa |
| Apple AirPlay & HomeKit | Supported |
| Gaming Features | HDMI 2.1, VRR, ALLM, 4K@120Hz, Auto HDR Tone Mapping, Auto Genre Picture Mode |
| IMAX Enhanced | Yes |
| Ambient Optimization | Yes (Auto Calibration with CalMAN) |
| Physical Specifications | |
| Dimensions (W × H × D) without Stand | 67.5″ × 38.74″ × 1.5″ (1713 × 984 × 38 mm) |
| Dimensions (W × H × D) with Stand | 67.5″ × 39.84″ × 15.94″ (1713 × 1012 × 405 mm) |
| Weight without Stand | 71.2 lb (32.3 kg) |
| Weight with Stand | 74.9 lb (34 kg) |
| VESA Mounting Pattern | 300 × 300 mm |
| In the Box | |
| Included Accessories | AC Power Cord, Batteries, Quick Setup Guide, Table Top Stand, Voice Remote Control |