The Vizio P Series Quantum is an excellent LED LCD TV, especially when viewed in a dark room. It has great picture quality in both SDR and HDR thanks to the wide color gamut, very high peak brightness, and great local dimming feature. Motion handling is also excellent, as very little blur is visible when watching fast paced content and the TV can perform black frame insertion when gaming to clear up fast motion. Input lag is also low, which is excellent. It isn't perfect though as banding is visible in gradients, the gray uniformity could be better and the image degrades rapidly when viewed at an angle.
Note that this is a different TV to the Vizio P Series 2018, and is the highest-end model from Vizio in 2018.
The design of the Vizio P Series Quantum is very good. The stand has a metallic finish and closely resembles the non-quantum version and the Vizio P Series 2017. The legs are nearly the full width of the TV, so a large stand is needed. Unfortunately, there is no cable management.
The stand is very similar to the standard Vizio P Series. It supports the TV well and there is very little wobble.
Footprint of the 65" model TV stand: 50.8" x 11.7"
The back of the Vizio Quantum is quite plain, very similar to the Vizio P Series. The connections and controls are both on the same side, and inputs face downwards and to the side. Although the controls are at the rear of the TV, they are easily accessible when wall mounted due to their large size. There is no cable management.
The borders and bezel are very thin. There is a slight gap between the inside edge of the bezel and the start of the LCD panel.
The maximum thickness is identical to the Vizio P Series 2018. The TV is of nearly uniform thickness and will sit almost flush when VESA mounted.
The temperature is nearly uniform and won't cause any issues.
The build quality is very good. There are no obvious gaps or areas that appear prone to breakage. The TV is sturdy and feels well built.
The picture quality of the Vizio PQ65-F1 is impressive. It has an excellent contrast ratio and great local dimming support that makes blacks appear deep, even in dark rooms. Its wide color gamut and ability to achieve very high levels of brightness make highlights pop when viewing HDR content. It is also remarkably bright in SDR and has excellent reflection handling allowing you to place it in a bright room without any worries. On the downside, the viewing angles are bad despite the viewing angle enhancement feature and at times you might spot some banding especially in the darker colors.
The Vizio P Series Quantum has an excellent native contrast ratio, even with local dimming off. The Local Dimming setting that was the most effective at boosting the contrast ratio was 'Medium', as when it was set to 'High' the contrast ratio was measured to be 9273:1.
The native contrast ratio is one of the highest we've measured up to now, a bit higher than the Samsung Q8FN, whereas the contrast ratio with local dimming enabled ranks second right behind the Samsung Q9FN.
The local dimming of the Vizio Quantum is great. The TV has 192 zones and is able to effectively boost highlights. In a side-by-side comparison with the Z9D the P Series Quantum is worse though, as rapidly changing small areas of the backlight produce more noticeable blooming.
When compared to the Samsung Q9FN, some people may prefer the local dimming performance of either TV. We can see in this side-by-side comparison that the Q9FN (top left) loses details in particularly challenging scenes, whereas the P Series Quantum (top right) is better at keeping these small highlights. This does result in deeper blacks on the Q9FN, but at the expense of details. The Vizio P Series 2018 (bottom left) also retains details but with a raised black level due to the fewer number of zones. The LG C8 (bottom right) shows the ideal performance with perfect blacks.
If you enjoy local dimming and don't mind some variation in screen brightness or blooming, then set local dimming to 'Medium'. This does increase the overall brightness of the image though, and can result in distracting blooming around bright objects. If you prefer a less aggressive local dimming implementation or find the brightness too high after decreasing the 'Backlight' then set it to 'Low', or disable local dimming completely if you don't like the changes in brightness.
Update 01/02/2019: The name for Vizio's local dimming feature has been renamed from Xtreme Black Engine Pro to Active Full Array.
Update 07/16/2019: Text updated to clarify settings.
The Vizio Quantum is one of the brightest TVs we have tested so far in HDR, very similar to the Sony Z9D and X930E. Small highlights in some scenes really stand out in HDR. Even with large bright scenes the TV is extremely bright.
These peak brightness numbers were measured with the local dimming setting of 'Medium'.
Overall good gray uniformity. At high brightness or when viewed at an angle, there is more obvious banding and dark zones on the screen, as shown here.
With dark grays, the uniformity is also good and issues aren't really noticeable in dark scenes.
The viewing angles on the Vizio P Series Quantum are bad. The brightness stays constant longer but the contrast still swings higher at even slight angles.
There is a feature called 'Enhanced Viewing Angle'. During our test, however, it wasn't effective. Our measurements of the LCD layer remained almost exactly the same whether activated or not, and it changes the sub-pixel dimming which reduces the color resolution. You can see a video of the viewing angle with this option enabled here.
Excellent black uniformity, which combined with the excellent native contrast ratio makes for excellent dark room viewing. Like the contrast ratio, the black uniformity with local dimming was measured on 'Medium'.
The Vizio P Series Quantum has excellent reflection handling, far better than the Vizio P Series. Direct lights are dimmed significantly and are not diffused across the screen. This is a great TV for watching TV shows in a bright room.
Here you can see a side-by-side comparison picture for the reflection handling of the P Series Quantum, the Samsung Q9FN, the Sony Z9D and the LG C8. The C8 isn't reflecting the softbox, and so isn't directly comparable.
The Quantum is easily able to overcome glare even in a very bright setting, and as such, is one of the best outdoor TVs we've tested. Note that since this TV wasn't meant for outdoor installation, so it is important to properly protect it from the elements with a proper enclosure.
Out of the box, the Vizio PQ65-F1 has good accuracy. Both color and white balance dE are low enough that most people won't notice much of a difference. The gamma is a bit high, and the color temperature is too warm at 6000 K, but this is easily corrected.
After calibration the color and white balance dE is very low. The gamma follows our target of 2.2 perfectly, and the color temperature is almost perfect.
Like other Vizio TVs, calibration is very easy to do with the available Smartcast app.
You can see our recommended settings here.
720p content such as cable is also upscaled slightly worse than other TVs. This is the same as the P Series 2018.
1080p content like from an older game console or Blu-ray player looks good without any oversharpening or artifacts.
Native 4K content is displayed perfectly without any issues. Interestingly when the 'Enhanced Viewing Angle' option is enabled, the color resolution is reduced and the TV appears to use a kind of spatial dithering as seen here.
In the Calibrated Dark Picture Mode, the EOTF curve follows our input stimulus very closely, but some scenes are too dark. At peak brightness the TV rolls off sharply. The PC and Game EOTF curves follow the input stimulus closely, but some dark scenes are over-darkened. Game mode was tested with the 'Calibrated Dark' Picture Mode, with low latency enabled.
Note that when in HDR, adjusting the 'Backlight' setting affects the PQ curve tracking. Increasing the 'Backlight' past the default of 50 for HDR content results in a brighter overall image, which is great for those in a brighter room.
Update 08/02/2019: We have retested the P Series Quantum with the latest firmware, and found that the gradient performance is within the same ballpark. The measurements and score have been updated.
Very similar gradient performance to the P Series 2018. There is some banding in all dark colors though.
Banding can be reduced in low resolution content by enabling the Reduce Noise feature, although this can cause some loss of fine details.
In the following images you can see how banding changes as we vary the brightness level in our test scene from the movie the Martian. While this is interesting behavior, this change in the gradient doesn't affect normal viewing.
There is no temporary image retention on the P-Series Quantum, even immediately after our 10 minute test.
We don't expect VA panels to experience permanent image retention, as the VA panel in our long-term test appears immune.
The pixel structure of the Vizio P Series Quantum is the same as the other Vizio TVs we have tested in 2018. It does, however, include a feature to enhance the viewing angle although in our test it did not work well. This adjusts the sub-pixel dimming and results in less color details. You can see a comparison of the pixels with the function on vs off. When enabled, a checkerboard like pattern appears which looks similar to the TCL 6 Series visible here.
The Vizio P Series Quantum has excellent motion handling. The pixel response time is extremely fast, but there is some overshoot. The backlight is not flicker-free, but the flicker is at such a high frequency that it shouldn't bother the majority of people and doesn't cause any duplications. The TV can reduce the flicker frequency as low as 60 Hz, even in Game mode, to further improve motion. Like the standard Vizio P 2018 and the Vizio M Series 2018, it can do so without reducing the perceived brightness.
Update 07/08/2019: We retested the flicker frequency of the TV, and found that it is now flickering at 120Hz. This change probably occured in a firmware update over the past year. Note that the above motion blur photo was taken before the update.
The Vizio PQ65-F1 has an excellent fast response time, and there is very little motion blur. Most of the blur in the image is due to 60p persistence. There is overshoot in most transitions, which could cause some color artifacts, but most people won't notice this due to the fast response time.
Update 07/08/2019: We have retested the backlight flicker, and found that the flicker frequency has decreased to 120Hz. This is much more noticeable, and may bother some people. We don't know when exactly this change occured, but we expect that it was in one of the firmware updates over the past year.
The Vizio P Series Quantum can lower the flicker frequency as low as 60 Hz, even when Game Low Latency is enabled. The TV counteracts the brightness loss due to flicker by increasing the amplitude of the backlight peaks, but on full-screen white the maximum brightness with the black frame insertion feature enabled is about 375 nits. This should be great for most gamers.
The Vizio P Series Quantum can interpolate 30 and 60 fps content up to 120 Hz. Motion can be smoother when this is enabled, but some people may be bothered by the effect. The algorithms are more aggressive than on similar TVs. In places where most TVs would stop interpolating, the Quantum continues and there are more noticeable artifacts.
30p content can be interpolated by adjusting the Reduce Judder slider. 60p interpolation is enabled by adjusting the Reduce Blur setting. In either case, if the amount of artifacts can be reduced by adjusting the setting. Lower values of each slider result in a less-strong soap opera effect but also result in fewer artifacts.
Due to the long frame hold time of 24p content, some stutter is noticeable, especially with wide-panning shots. Most people won't notice this.
The Vizio P Series Quantum can always remove judder from 24p content, even with Film Mode disabled. It can not remove judder from 24p content embedded in a 60p/i source, like from a cable box.
The Vizio PQ65-F1 does not support Freesync or HDMI 2.1's VRR. For a TV which supports this feature, see the Samsung Q9FN.
The Vizio P Series Quantum has remarkably low input lag and just like the Vizio P Series it can support most common resolutions including 1080p @ 120Hz and 4K @ 60Hz @ 4:4:4 + HDR. This will please most console gamers. All ports support HDMI 2.0 full bandwidth except HDMI port 5. Again just like all Vizio 2018 models, this model too includes a TV tuner.
HDMI port 5 is a low bandwidth port that doesn't support HDR, but has much lower input lag than the other ports, making it excellent for SDR gaming. We conducted all tests on HDMI ports 1 and 5. Port 5 has much lower lag for all resolutions that it can support, including 4k @ 60 Hz @ 4:2:0.
Chroma 4:4:4 only shown properly in Computer mode.
|1080p @ 60 Hz||27.0||15.6|
|out of game mode||146.0||82.2|
|1080p @ 120 Hz||30.0||10.6|
|4k @ 60 Hz||27.1||15.4|
|+ 4:4:4 + 8 bit HDR||26.9||N/A|
|out of game mode||135.5||82.2|
Great support for a wide range of different resolutions and refresh rates. HDMI ports 1-4 differ from the game low latency port on HDMI 5. Ports 1-4 support all common formats including chroma 4:4:4 and 4:2:2, but only when 'Full UHD Color' is enabled for the port being used. 4:4:4 color is only shown properly when the TV is set to Computer mode. Sharpness at 0 means no added sharpness. It is automatically greyed out in Computer mode.
HDMI Port 5 supports a 4k @ 60 Hz input, but only at 4:2:0. It does not support 4:2:2 or 4:4:4 because it does not have the necessary bandwidth. It also doesn't support HDR.
The inputs are identical to the Vizio P Series 2018. There is an analog audio out for wireless headphones, as well as an antenna input.
To output DTS over the optical connection we had to manually set the audio to 'Bitstream'. Like Samsung TVs, CEC must be enabled for the audio return channel to work.
HDMI port 5 is a lower bandwidth port designed for lower input lag.
The Vizio P Series Quantum has an average sound quality. This TV doesn't produce much bass, but it does get loud-enough and produces clear and intelligible dialog. However, it doesn't have a digital room correction system. For a better sound, dedicated speakers or soundbars are recommended.
The frequency response of the Quantum is average-at-best. The LFE (low-frequency extension) of 120Hz means that this TV won't produce any thump or rumble, and won't have much punch to its bass either. So it won't be ideal for bass-heavy content like video games or action movies. However, the response above the LFE point is decently balanced resulting in clear and intelligible dialog, which is slightly better than the P Series 2018. Also, this TV gets loud enough for most situations but there will be some pumping and compression artifacts under heavier loads.
The distortion performance is good. The overall amount of harmonic distortion produced is within good limits, and there is not a big jump in THD under heavier loads either. Compared to the P Series 2018, the Quantum model seems to produce less distortion in the higher frequencies, but this won't be noticeable to most in real-life situations.
The Vizio P-Series Quantum has decent smart features. The interface is modern and well organized, but slow to navigate with frequent lag. There is no app store, with the main focus being on streaming apps from your mobile device, but there is a decent selection of apps built-in that cover the most popular uses. The remote is very compact and basic but lacks more modern features like voice control, and it requires line of sight. If you have a Google Home or Amazon Alexa device, the Vizio PQ65-F1 can interface with it and control most functions by voice control, including turning the TV on or off.
The interface of the Vizio P Quantum is decent. It is well organized and easy to navigate, but some tabs are very slow to load and there can be significant lag.
Update 11/15/2018: Vizio has added a 'WatchFree' input via a firmware update. This uses the free Pluto TV service on the backend, and is well integrated.
Like all Vizio TVs we have reviewed, there are no ads on the main page, but there is a banner showing suggested content that can't be disabled.