If you"re hunting for one affordable 4K option from a dependable brand name, Panasonic"s CX400U series is a great place come start.


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Debuting in autumn 2015, these mainly frills-free sets are obtainable in 50- (TC-50CX400U), 55- (TC-55CX400U), and also 65-inch (TC-65CX400U) sizes and also deliver 4K resolution in addition to Panasonic"s signature attention to picture quality. The CX400U series starts at simply $750, and is positioned just below Panasonic"s CX600U series in terms of function set.

While friend won"t get an intricate smart attributes or stunning design, the CX400U has actually it where it counts: 4K resolution, deep contrast, and an excellent color accuracy. Sure, girlfriend can uncover cheaper 4K TVs out there—like this Hisense series—but girlfriend won"t really easily track down the CX400U"s mix of power strengths and also build top quality at this price.

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since it lacks a backlight control, us couldn"t set the CX400U come the 40 fL reference brightness standard. The 2-point and CMS controls were likewise only partially responsive.

our 50-inch CX400U was received on loan indigenous Panasonic. Before testing and also evaluation, we offered it around 16 hrs to warm up and break in when playing earlier content and test patterns. Us sourced check signals using a QuantumData signal generator, and measured light and also color with the Konica Minolta LS-100 and also CS-200, respectively.

During the evaluation, ns watched 1080p Blu-ray content, 4K on Netflix, and also cable content in change lighting problems both before and also after calibration. Overall, we spent around 5 days through the TV the town hall content and also running tests.


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The CX400U it is intended a solid black color level of 0.047 and also a top brightness of 209.80, offering it a very respectable comparison ratio that 4463:1.


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Viewing angle is just one of the CX400U"s weaker areas. Us measured a complete viewing angle of 39°, or ±18.5° from the center to either side of the screen.

Panasonic"s CX400U collection is obtainable in three display screen sizes:

• 50-inch (model TC-50CX400U), $749.99 MSRP• 55-inch (model TC-55CX400U), $1,059.99 MSRP• 65-inch (model TC-65CX400U), $1,649.99 MSRP

The CX400U collection TVs sit listed below Panasonic"s CX600, CX800, and also flagship CX850 2015 TV series. Every one of them attribute smart TV apps (no Firefox OS), 4K resolutions, VA (vertical alignment) kind LCD panels, straight LED lighting, and three HDMI inputs. There aren"t a most frills, however there"s nothing really missing, either.

We tested the 50-inch version, which different slightly from the 55- and also 65-inch models because it has actually a 60 Hz refresh rate, when the bigger sizes have 120 Hz refresh rates. This means the 65- and 55-inch models will manage 24fps and also fast-action content (like Blu-rays and sports) with an ext smoothness, but otherwise main point performance parameters choose contrast, color accuracy, white balance, and 4K upscaling have to be essentially identical between sizes.


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The CX400U to produce a fairly accurate RGBCMY shade gamut (rec.709) and white suggest (d65). The CMS didn"t work properly in our test unit, so we weren"t able to do any major changes during calibration.

an excellent contrast and solid picture quality—at this price, that"s enough.

The CX400U series is mainly a major success in state of photo presentation. As you"d expect, Panasonic"s high-end "pro" 4K TVs—like the CX850—look great, but additionally cost one arm and a leg. Through the CX400U, you obtain an approximation of that quality at much cheaper prices.


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Breaking negative in 4K looked excellent, particularly the high contrast in between dark, shadowy areas and also bright specular highlights. The shade wasn"t majorly impressive, but it to be accurate.

The CX400 collection also delivers great color accuracy and white balance because that an "entry level" set, prove you"re not just paying because that 4K resolution here. It"s precious noting the these TVs space still a much cry native the new HDR requirements requiring higher color saturation and also bit depth, however; this is closer to your existing 1080p set, except a little sharper as result of its 4K resolution.

For example, ns watched part of an episode of Breaking Bad ~ above the TV"s built in Netflix app, and also was pleased by the TV"s performance. Together I said, the shade vivacity wasn"t greatly impressive, but I"ve additionally been spoiled by broad color and also quantum dot-equipped TVs. In particular, i was impression by the deep shadow tones and also bright highlight areas, which looked awesome.


The TV"s semi-flat "2.4" gamma curve doesn"t job-related with its bright, locked backlight, but it also doesn"t heavily detract native the viewing suffer for most kinds of content.

A narrow viewing angle and also soap-opera movement smoothing mar this TV"s photo a bit.

When it comes to the basics—contrast, color, and white balance—the CX400U and its 4K resolution look at great. Yet there room a pair small flaws come consider prior to you operation out and buy it.

First: the viewing edge isn"t great. The CX400U uses what"s referred to as a "VA" style LCD panel, which generally provide good contrast, yet leaves you through narrower the town hall angles than the IPS panels ~ above some various other TVs. So if your couch is 10 feet away you need to be fine, yet your guests on the sides might may have some trouble.


The 50-inch CX400U us tested, being the smallest and cheapest in the series, has a 60 Hz refresh rate as opposed to the 120 Hz refresh rates of the 55- and also 65-inch models. When the in its entirety motion power is well for many TV shows and movies, the "MEMC" movement smoothing mode has actually to consist of the difference. Unfortunately, it"s a tiny too aggressive for most content, resulting in a "soap opera" watch than many viewers won"t like. You can always shut that off, however, so the isn"t a huge issue.

Note that this might not it is in an issue on the 120 Hz 55- and 65-inch CX400U TVs, and also is one area wherein the three room not similar in their meant performance.

Lastly, it"s worth mentioning that favor a the majority of Panasonic"s entry-level TVs this TV is an entirely various experience native the higher-end Panasonic TVs. The CX400U is assembled in Turkey, likely by manufacturer Vestel, and overall it is intended a different experience than something favor the CX600U.


Panasonic"s entry-level series is, hands down, a solid value.

The CX400U uses up really reliable photo quality for what you"re paying. While no as vivid or earth-shattering as the newest premium UHD sets, the CX400U"s 4K resolution is a welcome addition and the TV looks great whether it"s playing Netflix, a Blu-ray, or HD cable broadcasts.

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The just thing we"re really concerned around is availability. Best now, that seems choose the CX400U is only easily accessible via direct sale v Panasonic, and a couple online just retailers choose Newegg and also eBay. The said, if you have the right to track that down, the CX400U is a heavy 4K alternative at a good price. Just keep in mind the you can"t readjust the backlight, and it"s a tiny too bright for dark room city hall by default.


That said, if you"d favor Panasonic"s "Firefox OS" smart platform end the bare-bones collection of apps featured here, examine out the CX600U series. It"s a little an ext expensive, yet offers up comparable picture quality, a slightly nicer develop quality, and an flexible backlight.