Our Verdict
The Vizio M Series Quantum 2019 is a great TV for mixed usage. It delivers an impressive picture quality that's suitable for any type of content and performs well in both bright and dark rooms. Unfortunately, the viewing angles make it less ideal for those with a wide seating arrangement, but its overall performance should satisfy most people. Additionally, it has an exceptionally low input lag for those who want to game or use it as a PC monitor.
- Deep, uniform blacks.
- Impressive color gamut.
- Excellent low input lag.
- Mediocre dirty screen effect (DSE).
The Vizio M Series Quantum 2019 is a great TV for watching movies. With its full array local dimming feature and outstanding contrast ratio, this TV can produce deep inky blacks, which is great for watching movies in a dark room setting. It also has good upscaling performance for lower resolution content and remarkable motion handling to keep the picture crisp during fast-moving scenes.
The Vizio M Series Quantum 2019 is good for watching TV shows in a bright living room. It has great reflection handling and great peak brightness with SDR content, so glare shouldn't be an issue. Unfortunately, the image degrades at an angle, and older, lower resolution shows aren't upscaled as well as on other TVs.
The Vizio M Series Quantum 2019 is a good TV for watching sports, as it has outstanding motion handling that keeps the picture clear during fast-paced moments. However, the TV has some dirty screen effect that may be distracting for some, and the narrow viewing angles make it less ideal for watching with a group of friends.
The Vizio M Series Quantum 2019 is an excellent TV for gaming. Although the refresh rate is limited to 60Hz, it has a remarkably low input lag and outstanding motion handling. Unfortunately, it doesn't support FreeSync variable refresh rate and doesn't have an 'Auto Low Latency' mode. However, the exceptional black uniformity of this TV makes it a great choice for dark room gaming.
The Vizio M Series Quantum 2019 is a great TV for watching movies in HDR. It has an impressive contrast ratio and good local dimming feature. This TV also has an impressive color gamut. Unfortunately, it only has decent peak brightness in HDR.
The Vizio M Series Quantum 2019 is an excellent TV for HDR gaming. It has outstanding low input lag and an excellent response time, for a responsive gaming experience. It also looks amazing in a dark room, due to the impressive contrast ratio, outstanding black uniformity, and good local dimming feature. This TV also has an impressive color gamut, but only decent peak brightness in HDR, although most games have an option to adjust the game to match the TV's peak brightness.
The M Series Quantum 2019 is a great TV for use as a PC monitor. It has outstanding low input lag for a responsive desktop experience, and it has an excellent response time, so there's very little blur behind fast-moving objects. This TV can also display proper chroma 4:4:4 in any of the supported modes. Unfortunately, the image degrades at an angle.
Changelog
- Updated May 21, 2020: Converted to Test Bench 1.5.
- Updated Feb 21, 2020: Converted to Test Bench 1.4.
- Updated Jul 26, 2019: Review published.
- Updated Jul 24, 2019: Early access published.
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Differences Between Sizes And Variants
We tested the 65" M Series Quantum 2019, version M658-G1, and we expect our results to be valid for the 55" (M558-G1) model as well.
If someone comes across a different type of panel or if their M Series Quantum 2019 doesn't correspond to our review, let us know and we will update the review. Note that some tests, such as the gray uniformity, may vary between individual units.
Update 11/19/2019: Vizio has split their M-Series lineup into three tiers (M6, M7 and M8). We've tested the M7 variant, and we expect it to be very similar to the M6 variant. See our M7 Series Quantum 2019 review for our full results.
| Size | Model | Series | Peak Brightness | Dimming Zones |
| 55" | M558-G1 | M8 | 600 | 90 |
| 65" | M658-G1 | M8 | 600 | 90 |
We don't know the manufacturing date of our M658-G1, but the label is available here.
Popular TV Comparisons
The M Series Quantum 2019 is a great TV, and outperforms many similarly-priced models. See our recommendations for the best TVs, the best 4k TVs, and the best 4k gaming TVs.
The Vizio M Series Quantum 2019 and the TCL 6 Series 2018 are very similar overall. The M Series has a better local dimming feature and much better black uniformity, so it's a better choice for a dark room. The 6 Series is a lot brighter and has an optional motion interpolation feature.
Overall, the Vizio M Series Quantum 2019 is a bit better than the Vizio M8 Series Quantum 2020. The M Series Quantum 2019 has a better contrast ratio and local dimming, faster response time, and significantly better black uniformity. However, if you're planning on playing video games, the M8 Series Quantum 2020 has much lower input lag and variable refresh rate support.
The Vizio M Series Quantum 2019 is a bit better than the Hisense H8G. The Vizio displays deeper blacks and its local dimming feature is better. It also produces a much wider color gamut, has better out-of-the-box color accuracy, and the response time is quicker. Meanwhile, the Hisense gets brighter, it upscales lower resolution content better, and the built-in Android TV is easier to use and it has apps available to download.
The Vizio M Series Quantum 2019 is slightly better than the Vizio M7 Series Quantum 2019. The M Series (M8) has more local dimming zones and slightly better contrast ratio and delivers deeper blacks in a dark room, which is important when watching movies or HDR movies. The M7 has just slightly better reflection handling which is important in brighter rooms with many lights.
We buy and test dozens of TVs yearly, taking an objective, data-driven approach to deliver results you can trust. Our testing process is complex, with hundreds of individual tests that take over a week to complete. Most of our tests use specially designed test patterns that mimic real content, but we also use the same sources you have at home to ensure our results match the real-world experience. We use two main tools for our testing: a Colorimetry Research CR-100 colorimeter and a CR-250 spectroradiometer.
Test Results
Older Test Bench: This product has been tested using an older TV test methodology, before a major update. Some of the test results below aren't directly comparable with other TVs. Learn more
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