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Samsung JU6400 4K Ultra HD TV Review – (UN40JU6400, UN48JU6400, UN55JU6400, UN60JU6400, UN65JU6400 Versions)

by on November 18, 2015
Details
 
Manufacture
Overview

As one of Samsung’s absolute budget 4K ultra HD TVs, the JU6400 40 inch model is a complete winner in our books. While this TV certainly lacks some of Samsung’s high-end technologies, we can hardly complain given the target market and final price of the UN40JU6400. This is a prefect ultra-starter 4K TV for almost any budget and what it lacks in some features along with what it has by way of minor defects, it more than makes up for in some surprisingly excellent quality for its low cost status. The larger version such as the UN48JU6400 or the UN60JU6400 are just as great.

Featuring some excellent 4K rendering, razor sharp graphics the surprising inclusion of Samsung’s new Tizen Smart TV platform and some perfectly decent if slightly basic connectivity specs, the JU6400 offers a lot more than what you’d expect for such an affordable 4K UHD TV and quite frankly, it thus ranks as amongst the better deals we’ve seen in this year for consumers who want to get their feet wet in 4K but are leery of really spending a fortune or simply working on a very tight budget.

In basic terms, the UN40JU6400 and some of its larger cousins such as the UN65JU6400 are all wonderful representative displays of how well competition on the 4K display market has worked at bringing these once extremely expensive UHD TVs to the world of the everyday user, while still keeping to a high degree of quality and increasing spec standardization.

The Good

There is plenty to like in the rather compact UN40JU6400. Despite its low price and more conservative specs, this little TV offer some killer specs and characteristics which any beginner 4K TV user would find enjoyable. Furthermore, as a smaller UHD TV, it’s also a superb potential piece of 4K UHD PC gaming technology (excepting of course its lack of a DisplayPort 1.2 connection).

For starters, the picture quality on the JU6400 is a definite winner. The 4K UHD resolution manages to look great on the smaller screen and color renders with surprising effectiveness right out of the box and can be made to look even better after some minor manual adjustments.

And, while the JU6400 doesn’t have the expanded color gamuts that some of Samsung’s higher end SUHD 4K TVs but the company did manage to throw in PurColor technology for what amounts to a very respectable default color vibrancy which is more than good enough for a low cost start TV and whose deficiencies won’t even be noticed by most users who aren’t accustomed to the very best in top-shelf 4K TV technology.

Furthermore, the contrast and black uniformity on the JU6400 are truly good. We’re not talking about the superb blacks of Samsung’s JS9000 or Sony’s X940C 4K premium TVs but for a conventional LED/LCD TV, the JU6400 delivers above average contrast performance and black uniformity that looks great, with only very minor deviations along the bottom corners.

Finally, we should mention the Tizen OS of the JU6400 and its rather remarkably good 4K UHD upscaling engine. A another lower-end JU series Samsung 4K TV we recently reviewed, the JU6700, is a larger model with a better spec roster and a moderately higher price (though it’s also a budget 4K UHD TV) but the smaller, cheaper JU6400 has an oddly superior 4K upscaling engine that not only delivers excellent, sharp Full HD upscaling but also manages to make 480p SD and 720p HD content scale upwards into something clearer, sharper and more visually appealing, and it pulls this off with a low degree of distortion. Furthermore, the more budget-minded JU6400 also comes with the newest Samsung Tizen Smart TV OS platform, which the JU6700 we reviewed oddly didn’t have included.

Check the Price of the Samsung JU6400 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.4 - 12 Reviews

The bad

First of all, it should be kept in mind that the JU6400 is after all a very affordable and highly budget-oriented 4K UHD TV that’s simply not going to include some premium features like HDR display capacity, quantum dot color and robust future-proofed connectivity extras. So for lacking these things, we can’t really criticize this TV, though all of these above features would definitely be nice to see even in a budget model like this at some point down the road.

That said, there are indeed a few less than ideal aspects of the JU6400 that we distinctly think could have been improved even at this TV’s price level. First of all, the screen size of the JU6400 is not exactly ideal. 4K ultra HD resolution is always best when viewed on a larger screen and while it can indeed be appreciated on smaller display spaces, the real impact of all those extra pixels gets lost at 40 inches.

It’s actually difficult to distinguish from conventional Full HD on this TV and in part this is also why the JU6400’s upscaling engine works better than we’d have expected: stretching Full HD and even 720p HD across only 40 inches of screen space in an effort to simulate 4K is much easier than stretching these resolutions across 55 to 70 inches. On the other hand, with so little difference, it becomes a bit hard to justify even bothering to go for 4K resolution in such a small TV. In practical terms, a cheaper Full HD model would deliver almost the same clarity.

Moving along, the refresh rate and judder issues in the JU6400 are problematic and if you’re a major fan of 24p DVD, streaming and Blu-ray movies, this is not a model you’d want to go for. It’s also not your best bet for streamed or otherwise sportcasts and 4K UHD gaming since its native refresh rate sits at just 60Hz with an artificial Samsung Motion Rate bump up to 120Hz. However, Motion Rate isn’t the same as native refresh and those 60Hz do provoke some problems here and there.

Additionally, Samsung could have also included true Local Dimming technology in the JU6400 for the sake of some even better, finer detail when it comes to varying between light and dark on the screen during movies and other programming. However, instead of real Local Dimming technology, the JU6400 comes with that the manufacturer calls “UHD Dimming” which is a weak-sauce substitute for actual local dimming.

Finally, connectivity-wise, the JU6400 comes with all of the essentials for access to the majority of today’s 4K ultra HD videos and movies but it also does lack a couple things that could have been included even in this budget model. The first of these is a fourth HDMI 2.0 port. Most modern 4K UHD TVs of all price levels come with 4 HDMI 2.0 ports (except, oddly, LG’s ultra-premium OLED 4K TVs, which for some bizarre reason often also come with only 3 HDMI slots) and this minor detail is an odd absence in the JU6400. In addition to the HDMI issue, the JU6400 could have also been given an option for Samsung’s One Connect or at least their One Connect mini future-proofed and replaceable external connectivity boxes.

Final Thoughts

Despite some of its flaws, the JU6400 from Samsung is a superb little 4K UHD TV and represents one of the better deals available today on the 4K UHD T market. With this model, you get some great visual specs, excellent general Samsung quality and all of the core essentials of 4K home entertainment for a very low price. Our biggest issue with the JU6400 is actually the small size of its screen but this might not be a problem for many users.

Specs

Screen size: 54.6 diagonal inches
Other Versions: UN48JU6400 - 48 inches, UN55JU6400 - 55 inches, UN60JU6400 - 60 inches, UN65JU6400 - 65 inches
Smart TV: Tizen OS, Smart Hub, Smart TV with Apps and Full Web Browser
HEVC (H.265) Included: Yes
HD to UHD upscaling: Yes
HDCP 2.2 Compliance: Yes
Refresh Rate: 60Hz native refresh rate (Motion Rate 120Hz)
Screen Lighting: Edge-lit LED backlighting without local dimming
Resolution: 3,840 x 2,160 pixels UHD
Wireless Connectivity: Yes, includes both built-in WiFi and Ethernet port
Remotes: Samsung smart button remote
Connectivity: 4 HDMI 2.0 ports, 3 USB ports, 1 Ethernet port, 1 Component, 1 composite, 1 Audio Out, 1 Digital Audio Out
Sound: 20W (10W x 2) Down Firing + Base Reflex (2CH) speakers with DTS Premium Sound 5.1
Contrast Ratio: 2980:1
Other Display Features: Auto Depth Enhancer and PurColor Accuracy
TV weight without/with stand: 16.8 lb/18.7 lb
Dimensions: 36.1" x 21.1" x 2.5" inches without stand/ With stand: 36.1" x 23.3" x 7.7" inches
Processor: Quad-core


Highlights

In terms of diverse and innovative highlights, the JU6400 isn’t quite bursting with features. This is after a fairly economical essentials-oriented 4K ultra HD TV. However, there are a couple things that we’d have to say we really liked, features which stand out.

First among these is the Tizen OS and Smart Hub platform of the TV’s smart interface. It’s great, easy to use and moves smoothly thanks to the built-in quad-core processor that Samsung loaded into this compact beauty of a 4K UHD TV. Tizen as a whole is Samsung’s latest and most advanced OS and it definitely marks some serious improvement over the previous Smart Hub system of older 4K TVs from this brand. On the whole, it’s more intuitive, faster and much easier to navigate. Furthermore, its full-blown web browser is a superb tool for surfing the web and accessing apps for different types of media.

Additionally, Smart Hub in the new Tizen system is all about easy accessibility and its pop-up menu along the bottom of the screen is wonderfully easy to navigate with its two main buttons, “Featured” and “Recent”. The Featured square on the left of the screen offers one touch access to the whole Smart Hub interface, where you can open up apps, games, web browsing and pretty much everything else that makes the JU6400’s smart TV system tick along for your benefit. Featured is in essence where you’ll find access to apps like games, Netflix YouTube, Amazon, Twitter and whatever personal content you’ve got linked to the TV via external devices through USB or HDMI ports. Featured is also where the JU6400’s Search options can be found.

On the other hand, in Recent, you’ll find any apps and media that you’ve been using or watching recently along with inputs for your Blu-ray player, recently viewed TV channels and shortcuts to other external or internal (streaming) media sources.
These are just some of the highlights of the JU6400’s Smart Hub/Tizen interface. There is also a function for linking a smartphone or tablet to your unit of this TV thanks to Samsung’s Smart View 2.0 app for Android or iOS. By downloading this little tool to the mobile device of your choice, you can quickly and easily swipe photos, videos and music between JU6400 and your phone or tablet.

Finally, core 4K UHD media streaming apps like Netflix, Amazon Prime Instant Video, YouTube and a couple of others are all included by default in the Tizen interface of the UN40JU6400, so if you want access to 4K UHD content right out of the box, this TV has got you covered right away. You’ll have to subscribe (and pay to do so) to the Netflix and Amazon content in ultra HD but YouTube’s growing selection of 4K videos is absolutely free to view for the sake of showing off just how good native streamed 4K video can look on this economical TV.


Check the Price of the Samsung JU6400 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.4 - 12 Reviews

Visual Specs

Visually, the JU6400 is a remarkably robust performer that delivers more than we’d have expected of such a low cost 4K UHD TV. In basic terms, this is a nearly perfect next-generation 4K UHD starter TV for those who want decent visual specs. The 4K ultra HD detail is eye-poppingly good on the compact screen of the JU6400 when watched directly from in front and colors have a very impressive level of nuance, vibrancy and realism to them. Furthermore, the native contrast ratio at just a smidge under 3000:1 is a winner that goes above the average for many other 4K UHD models we’ve seen at similar or sometimes even higher prices. And while this particular TV lacks true LED Local Dimming technology, it still manages to make its sharp range of contrast work reasonably well even in rather detailed interplays of light and dark in onscreen content.

As for non-4K footage, in this the JU6400 is a winner as well. For any 4K UHD TV, its capacity to upscale non-4K content is a crucial feature in a world where true native 4K entertainment still represents only a tiny fraction of what’s available on the market. Fortunately however, as we’ve already mentioned, the JU6400 does a great job in this department, particularly for Full HD video and especially for Blu-ray 1080p Full HD video. These two latter resolutions scale up superbly to something that looks clear, sharp, vibrant and comes remarkably close to resembling native 4K. Furthermore, even 720p HD and 480p SD content scale very decently across the compact 40 inch screen of the JU6400. They scaled rather well on our test using the 55 inch version - UN55JU6400.

Sample video sequences in native 4K of starscape scenes, vibrant garden landscapes and the raging glory of the sun from a YouTube 4K video shot by NASA all looked wonderfully crisp in their own specific ways with the display of the JU6400. The starscape delivered a rich, deep black background with clear little pinpricks of light for stars, while the garden visual offers a wonderfully varied riot of green tones and other colors sharply standing out from them. And as for the sun video, contrast interplays of darker orange, brighter orange and the red-tinted black backdrop of space all play together in an impressive feat of color and contrast in such a small and economical 4K TV.

Connectivity

Connectivity—wise, what you get with the JU6400 is your essential package of essentials for the latest in conventional 4K UHD and non-4K content access. This TV comes with 3 HDMI 2.0 ports, 2 USB ports and all connectivity for 4K content is fully compatible with HDCP 2.2 content copy protection, HEVC/VP9 video encoding and HDMI 2.0 for access to streamed or hardline media from external sources at a full 60 frames per second and without content blockage issues. Furthermore, as we’d already mentioned, the JU6400 comes with full internet connectivity via WiFi and an Ethernet port. So if your home internet connection is strong enough, you can easily watch streamed 4K from the major sources available in your area.

Pricing

The 40 inch model of the Samsung JU6400 is currently selling on Amazon.com for just $627.24. This is indeed a great bargain price for such a surprisingly well crafted piece of 4K UHD technology.

Check the Price of the Samsung JU6400 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.4 - 12 Reviews

Not so Great

The two most essential defects of the JU6400 in our view are its relatively small screen size, which doesn’t allow for full appreciation of native 4K UHD resolution and it 8.29 million pixels, and the TV’s lack of support for 120Hz refresh and 24p content from external sources. These latter deficiencies can cause some notable judder in video and movies filmed in 24p while also causing lack of smoothness in fast-paced content like sportscasts and games.

Positives

• Excellent overall picture quality
• Remarkably good contrast
• Excellent color rendition
• Wonderful price
• Latest Tizen Smart TV OS
• Great access to apps and web browsing

Negatives

• Low refresh rate and some judder
• No support for 24p content
• Connectivity options are a bit weaker than we like
• Small screen
• NO 3D TV technology

Editor Rating
 
Features
A-

 
Quality
A

 
User Friendliness
A

 
Connectivity
A+

 
Price
A-

Total Score
A-

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User Rating
 
Features
B-

 
Quality
B-

 
User Friendliness
B-

 
Connectivity
B

 
Price
B

User Score
165 ratings
B-

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Bottom Line
 

Small screen and some other minor content-related flaws aside, the JU6400 4K TV from Samsung is an absolutely great choice for its price. This little TV offers some excellent visual spec and all the essentials for next-generation 4K content viewing while also being great at upscaling normal HD content very competently. We recommend this TV to really budget-minded first-time buyers.

Check the Price of the Samsung JU6400 4K Ultra HD Smart LED TV (2015 Model) on Amazon:

4.4 - 12 Reviews

 
21 comments
 
Leave a reply »

 
  • Sunil Prathi
    December 7, 2015 at 6:37 am

    Hello Stephen. Hoping you can help me with a dilemma. What is the better option between a VIZIO M55-C2 and the SAMSUNG UN55JU6400? I’m able to find them both at a similar price (with the Samsung being slightly more expensive), and tempted to go with the more popular brand (Samsung). The ratings I’ve read so far have just added to my confusion. Please help!!

    Regards
    Sunil Prathi

    Reply

    • Stephen
      Stephen
      December 7, 2015 at 10:54 am

      Hello there Sunil,

      To uncomplicate things for you a bit, I’d strongly suggest you go for the Vizio M-Series TV you’re looking at (the M55). And the reason for this is very simple. Both TVs (the Samsung and the Vizio) are great and mostly even in terms of their overall quality and specs but the Vizio performs much better on one crucial spec and that’s contrast. This is key and with all other specs being mostly equal between the two models (color, the all-important upscaling engine, etc) the TV with the far superior contrast is going to make for a much better movie and TV viewing experience, especially for native 4K UHD content.

      Reply

      • Lockerkit
        March 3, 2016 at 2:08 am

        Hello Stephen,

        Great review! I was wondering if u could answer my question though.
        I am a gamer (ps4) and I’m hesitating between this 50inch model and the Sony Bravia KDL-50W809C which has only 1080p but has a refresh rate of 100Hz, this model has only 50Hz.

        What would you recommend for mainly gaming and a decent picture quality?

        Thanks in advance.

        Greetings Lockerkit

        Reply

  • Rod
    December 9, 2015 at 3:48 pm

    Hello Stephen

    What a comprehensive and informative review of the Samsung 40″ Series 6 4K Ultra HD LED LCD Smart TV..Thank you
    I am looking to place the unit into a new build and create a wall cavity for the unit in the 90mm stud wall. Fixed to a pivot/tilt arm that can be brought forward/swing to direction of viewer in room etc. Maybe covered with art work when not in use….as a dual use .
    Can you please confirm the side on width of the 40″ TV and any opinions or tips on the plan…Many thanks

    Reply

  • serge Prieur
    December 28, 2015 at 6:19 am

    hello Stephen
    When i setup my tv samsung un40ju6400 for the first time yesterday , i had to read a long contract terms (58 pages) and it said at some place that samsung is able to recongnize my voice and also they have a camera to detect our movements and they have a face recognition system. They seem to collect a lot of informations on us if we accept these terms.
    Is all smart tv have the same kind of terms to be accepted to be able to use the internet smart thing contend ?
    Is that safe ?
    I’ve decline it for now but i don’t have access to any smart tv internet connexion at all when i do so.

    apologize for my english….

    regards
    serge

    Reply

  • Gé Nefkens
    January 16, 2016 at 8:55 am

    Since always I cover with scotch all suspected camera inputs
    on mu iPhones, Galaxies IMacs and PCs
    Just do the same

    Further,
    can anybody tell if Samsung will up date upgrade the older TVs with
    Play in SlowMotion from the Contests folder

    and if not : is the feature TIME LAPSE in the new models ??

    If not , . . . perhaps any other CURVED 4-8-K TV manufacturer
    and I ll change the next day

    Reply

  • Lockerkit
    March 3, 2016 at 2:08 am

    Hello Stephen,

    Great review! I was wondering if u could answer my question though.
    I am a gamer (ps4) and I’m hesitating between this 50inch model and the Sony Bravia KDL-50W809C which has only 1080p but has a refresh rate of 100Hz, this model has only 50Hz.

    What would you recommend for mainly gaming and a decent picture quality?

    Thanks in advance.

    Greetings Lockerkit

    Reply

    • Stephen
      Stephen
      March 3, 2016 at 1:31 pm

      Hello Lockerkit. Quite simply it depends on what you’re interested in getting more of: performance at high frame rates or crystal clear 4K textures. If you don’t mind a bit of Full HD pixelation on a 50 inch display at relatively close range, then you’ll be happy with the HD TV and it’s higher refresh (translating to higher frame rate). Furthermore, your PC GPUwill have a much easier time of handling this resolution quickly and smoothly. However, if you’d like to invest in a truly powerful 4K-capable GPU like Nvidia’s 980 Ti or one of the newest AMD GPUs, you can still enjoy decent frame rates with 4K-capable games on the JU6400. Just bear in mind that this TV does not feature DisplayPort 1.2, so you’ll have to either get a converter for DP to HDMI 2.0 or pick a graphics card that supports HDMI connectivity from what I recall.

      Reply

  • Ibra
    March 8, 2016 at 9:53 am

    Hi, in all my sesrches I see this model having 4 hdmi ports. I am a bit confused as this very review says 3. Thanks

    Reply

    • Stephen
      Stephen
      March 8, 2016 at 9:58 am

      Hello there Ibra, you are correct, this model like almost all Samsung 4K TVs, comes with 4 HDMI ports. This detail was corrected.

      Reply

  • Galane
    March 23, 2016 at 2:00 am

    Something not mentioned is the 40″ version’s compact dimensions enable it to fit in some entertainment centers and built-ins that were made for the massive 30+” CRT 4:3 televisions.

    Most of today’s flat TVs have very narrow bezels, unlike ones from a few years ago that were up to 2″ wide. I bought a UN40JU6400 which is going to replace a 37″ Vizio 1080p, yet the larger screen Samsung is considerably shorter in height and IIRC a little bit narrower. It’s also quite a bit lighter and much thinner. Should also use quite a bit less electricity too.

    Reply

  • vVict0rx
    June 18, 2016 at 2:34 pm

    Contrast will vary per tv size, 55 will be mostly IPS, and my 48 incher is also IPS. The Ips versions will ave very poor contrast ratio compared to VA ones. You might be very disappointment with really shitty contrast specially while playing games on your great gaming rig.

    Reply

  • Jon
    July 31, 2016 at 10:13 am

    Good day, i was contemplating getting the 65 inch version of this TV or the LG 65UF850. Which would you recommend? I watch a lot of football and movies.

    Reply

  • Danny
    September 11, 2016 at 7:02 pm

    I thought Samsung updated all 2015 UD10 models to HR10, so this would be included, right?

    Reply

    • Danny
      September 11, 2016 at 7:19 pm

      http://www.flatpanelshd.com/article.php?subaction=showfull&id=1428310162

      “Samsung will issue a firmware update that will enable its 2015 SUHD and UHD TVs to display a broader library of High Dynamic Range (HDR) content now from external devices. HDR delivers a much higher level of contrast between light and dark to produce an image that is more realistic and closer to what the content creator imagined. The firmware update is available now at no additional cost to owners of 2015 Samsung SUHD and UHD TV’s.” wrote Samsung”

      “At IFA 2015, Samsung announced that its 2015 SUHD and UHD TVs will be “the first on the market capable of supporting the new HDMI 2.0a specification”. HDMI 2.0a is required to receive 4K HDR movies from players such as those based on the new Ultra HD Blu-ray standard”

      Reply

  • raf
    November 7, 2016 at 12:02 pm

    This model has been updated with hdr capability about month ago.

    Reply

    • Stephen
      Stephen
      November 18, 2016 at 12:52 pm

      This would be the ability to read HDR signals. In display terms this TV won’t meaningfully display HDR visuals to our knowledge, especially for HDR black and brightness levels. The update you speak of won’t change much of anything for it’s picture quality.

      Reply

      • Noodlesc
        November 28, 2016 at 5:54 am

        That isn’t at all true. Having compared the difference between the firmware HDR update with non-hdr content on this TV with no HDR using an Xbox One S, the difference is night and day.

        So much so in fact that it deserves a more detailed look and response rather than a flippant “to our knowledge” or “won’t change much of anything for it’s picture quality”.

        Instead of basing your comments on such with what you THINK may be the case, might I suggest you revisit the TV and update this review accordingly.

        Reply

  • Andre
    April 9, 2017 at 5:28 pm

    I will never buy another Samsung product again. It is ridiculous that a replacement part costs more than the product itself. No more Samsung.

    Reply

  • Mojtaba
    May 19, 2017 at 2:56 pm

    hey , i have a big question i have 55JU6400 but the problem is when i connect it to my PC i can’t get more than 30hz on 4k resolution , did i have to use better graphic card ? mine is AMD R7 260x and the cable i use i don’t know its will support 4k at 60hz or not its very important to me if my tv supports 4k at 60hz if its really supports that what kind of cable or even graphic card did u recommend for it , let me tell the people about 60hz that they said its not good for gaming i can say 60hz is enough for gaming .

    Reply

    • Stephen
      Stephen
      May 19, 2017 at 5:42 pm

      Hi there Mojtaba, your problem may be either the HDMI port you’re using on the JU6400you have (only some of its HDMI ports support full HDMI 2.0 passthrough for 4k at 60Hz, or your problem might be that your PC itself doesn’t support 4K at 60Hz. I’d have to know what model it is. As for your GPU, I haven’t reviewed it but to my knowledge it offers no HDMI 2.0 connectivity so this too might be your problem.

      Reply

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