The Mi X Series 55-inch 4K Smart TV is Xiaomi’s budget-friendly offering in the large-screen segment, combining a 4K display, Google TV, and decent performance at an affordable price. This review covers its design, picture quality, sound, smart features, and real-world performance to help you decide if it’s worth buying.
Key Specifications
- Display Type: LED (Direct-Lit)
- Screen Size: 55-inch (138 cm)
- Resolution: 4K Ultra HD (3840 x 2160)
- HDR Support: HDR10, HLG, Dolby Vision
- Processor: Quad-core (Cortex-A55)
- Operating System: Google TV (Android 11)
- Refresh Rate: 60Hz
- HDMI Ports: 3 (HDMI 2.1 x 1, HDMI 2.0 x 2)
- USB Ports: 2 (USB 2.0)
- Wi-Fi: Dual-band (2.4GHz & 5GHz)
- Bluetooth: 5.0
- Sound Output: 24W (2.0ch) with Dolby Audio & DTS-HD
- Voice Control: Google Assistant, Far-field mic support
- Dimensions (Without Stand): 1228.8mm x 711.9mm x 81.3mm
- Weight (Without Stand): 12.8 kg
Design & Build Quality
Sleek & Minimalist Look
- The TV has thin bezels (nearly borderless on three sides), giving it a modern look.
- The stand is plastic but sturdy, though it doesn’t swivel.
- The back panel is plain plastic with basic cable management.
Build Quality
- The materials feel budget-grade but durable enough for regular use.
- The panel is not as slim as premium TVs but remains lightweight.
Picture Quality
4K UHD Clarity & Color Performance
- The 4K resolution delivers sharp details in movies and streaming.
- Color accuracy is decent, with 90% DCI-P3 coverage, making colors vibrant but slightly oversaturated by default.
- Brightness levels (~250-300 nits) are average—good for dim rooms but struggles in bright daylight.
HDR Performance (Dolby Vision, HDR10, HLG)
- Dolby Vision support is a big plus for Netflix and Prime Video.
- HDR10 & HLG improve dynamic range, but peak brightness is limited, so highlights don’t pop as much as in premium TVs.
- Black levels are mediocre (expected at this price)—dark scenes look grayish rather than deep black.
Viewing Angles & Motion Handling
- Viewing angles are decent (IPS-like)—colors stay consistent up to 30-40 degrees, then fade.
- 60Hz panel with MEMC (Motion Estimation Motion Compensation) reduces blur in sports, but fast action still shows slight ghosting.
Smart Features & Performance
Google TV Experience
- Smooth interface with customizable recommendations.
- Pre-installed apps: Netflix, Prime Video, Disney+ Hotstar, YouTube.
- Google Play Store allows sideloading apps like Kodi, Stremio.
Voice Control & AI Features
- Built-in Google Assistant works well for searches, smart home control.
- Far-field mic allows voice commands without the remote.
Performance (Speed & Lag)
- The quad-core processor handles daily streaming well but can stutter with heavy multitasking.
- RAM (2GB) is just enough—some apps reload if too many are open.
Gaming Performance
- HDMI 2.1 (1 port) supports 4K@60Hz (not 120Hz).
- Input lag (~15ms in Game Mode) is good for casual gaming.
- No VRR (Variable Refresh Rate)—screen tearing may occur in fast-paced games.
Sound Quality
- 24W speakers are louder than most budget TVs but lack bass.
- Dolby Audio & DTS-HD improve clarity, but dialogue-heavy scenes sound thin.
- External soundbar recommended for movies.
Connectivity & Ports
- HDMI 2.1 (1 port) – Good for next-gen consoles (but only 60Hz).
- HDMI 2.0 (2 ports) – For set-top box, soundbar.
- USB 2.0 (2 ports) – Supports media playback (no USB 3.0).
- Bluetooth 5.0 – Connects headphones, soundbars wirelessly.
- Wi-Fi 5 (Dual-band) – Stable streaming in 4K.
Pros & Cons
Pros:
- Affordable 4K TV with Dolby Vision (rare in this range).
- Google TV is smooth & feature-rich.
- Good for casual gaming (low input lag).
- Decent sound for a budget TV.
Cons:
- Average brightness & black levels.
- 60Hz panel limits gaming & sports.
- Plastic build feels cheap.
- Only 2GB RAM—can lag with too many apps.
Final Verdict: Who Should Buy It?
Best For:
- Budget buyers who want 4K + Dolby Vision.
- Casual viewers & streamers (Netflix, Prime, Hotstar).
- Gamers on a budget (PS5/Xbox at 4K 60Hz).
Not For:
- Hardcore gamers (needs 120Hz, VRR).
- Bright room setups (not bright enough).
- Cinephiles (mediocre blacks, no local dimming).
Alternatives to Consider
- Realme 4K Smart TV (better brightness, but no Dolby Vision).
- TCL C645 (QLED, better contrast, but pricier).
- Sony X74K (better motion handling, but no Dolby Vision).
Final Rating: 4/5
The Mi X Series 55-inch 4K TV is a great budget choice with Dolby Vision, Google TV, and decent gaming performance. However, brightness and black levels are average, and the 60Hz panel limits smoothness in fast content. If you want a cheap 4K TV for movies & casual use, it’s a solid pick.