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Sony Bravia KDL-40NX713 - A Mostly Strong Performance

John Archer

By John Archer


  • Recommended by TR
Sony Bravia KDL-40NX713


Our Score


User Score

Review Price free/subscription

Achieving the best settings for black level response on the 40NX713 does cause a little greyscale subtlety and shadow detail to slip into the blackness, but not so badly to really cause alarm. Rather more aggravating is the speed with which the image loses contrast once you move beyond a viewing angle of 30 degrees - though of course, the 40NX713 is hardly alone in this respect.

Some people might find the 40NX713’s picture a touch muted post calibration. But actually, once we’d grown accustomed to it, this struck us rather as a strength than a weakness. For while many edge LED screens mistake gaudiness for attractiveness, the 40NX713 seems built with a rather more cinematic sensibility. We’ve already seen how the relatively 'reined in' picture helps produce good black levels, but it also helps colours enjoy a naturalism of tone and subtle richness that makes long-term viewing soothing and immersive.

Another benefit of the 40NX713’s relatively gentle approach can be seen with standard definition pictures. They are upscaled cleanly, without forcing detail too much, and without losing colour tone credibility. The clean look to standard definition also makes us suddenly realise that the screen has a very respectable native response time. What residual blur and judder remains can generally be removed with the MotionFlow processing, though this can generate minor unwanted side effects, so only use it with caution.

Turning next to the 40NX713’s optional 3D capabilities, they’re good rather than great. On the plus side, full HD 3D images from Blu-ray look superbly detailed and crisp, as well as benefiting from an excellent contrast by LCD standards. Colours look quite natural too, and retain this naturalism even during dark scenes - something even Panasonic’s otherwise excellent 3D plasmas can struggle with.

However, the 40NX713’s 3D images are also prone to our old nemesis, crosstalk. There is definite evidence of double ghosting around some elements of most 3D scenes, which can become seriously distracting once you start to notice it.

The 40NX713 certainly isn’t the worst offender in this regard, but nor is it the best. Another lesser issue concerns the quite substantial hit the 3D image’s brightness takes when you don Sony’s active shutter glasses - a slightly negative result of the otherwise likeable sedate quality of the set’s general picture tone.

Overall, the 40NX713’s pictures class as excellent with 2D provided you’re after a fairly cinematic picture rather than a particularly in-your-face one. With 3D it rates as fair to good.

The sound accompanying these generally pleasing pictures is pretty good too. Certainly there’s more depth, openness and clarity to the soundstage than we commonly find with sub-50mm TVs, even if bass levels are hardly going to shake your foundations.


Considered first and foremost as a 2D TV - which is, after all, how it sells in its 'native' state - the 40NX713 is a really fine option for a relatively discerning viewer. The price of under £700 we’ve found online makes it great value too.

Crosstalk issues make it a more compromised 3D performer if you decide you want to upgrade it. It’s still not a bad effort, but if 3D is really important to you, you might be better waiting for Sony’s true next-generation 3D panels to start coming through in a couple of months.

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January 20, 2011, 9:12 pm

I have the predecessor for this TV, the NX803 (which is a great TV), which I use with the silver 'bar' stand.

Whilst the stand makes the TV look great - I definitely noticed a deterioration of sound quality. This took the sound quality from adequate (7/10) to poor (5/10). This can be addressed with the use of a separate speaker system, of course.

RE: Silver Stand for the TV


January 21, 2011, 3:17 pm

I find it interesting that this model has no backlighting issues, What Hifi have a review of the 40EX713 which is also an Edge-LED model gets a lot of negative comments because of uneven backlighting/backlight bleed. Sounds like there's a bit of a lottery with Sony's quality depending on which specific model you go for.

I think it does incline me to caution before going near their TV's!

Although it looks like their 2011 range is going to feature some direct LED local dimming models which sounds worth holding off for.


January 22, 2011, 8:38 pm

@John - where did you find this at £699? PRC direct have it for £789 and only as an In Store purchase.

I've just seen it in store at John Lewis and it does look good....tough call between this and the much pricier Philips 9705


February 8, 2011, 4:10 pm

TR - still can't find it for £699 :-)

Geoff Richards

February 9, 2011, 4:23 pm

@gdawg304 - I have done some digging on your behalf. This model was definitely for sale as low as £699 over the Christmas period, and as is the case with all our reviews, was for sale at that price on the day of publication.

Of course, prices do fluctuate and are subject to the usual forces of supply and demand. I'm sure it will come back down in price over time from the current levels.


February 10, 2011, 6:55 pm

@ Geoff - this may be the case, however on date of review publication the retailer which you listed as £699 online (PRC) was selling it for £789 and *only* as an in store purchase.

Not that I'm implying the review is attempting to mislead as I know that's not the case at all!! Just annoying as for £699 I'd have probably bought one, but for £1k+, no way.

Looking around, a lot of places seem to be increasing the price of this TV, Marks & Spencers for example bumped it up from £999 to £1199, right before Sony refresh their range for 2011 - doesn't seem like the time to be raising prices on "old" tech.

On another note I'm seeing the Panasonic P42V20 rapidly dropping in price and available for as low as £829 which seems like a damn good price for that TV


June 8, 2011, 11:12 pm

I have the sound bar and contrary to what is suggested in the review, the sound is diverted from the TV speakers to the speakers in the sound bar, therefore there is no deterioration of the TV speaker sound as these are not used when the sound bar is in use. However the sound is improved immeasurably with the use of the sound bar, giving a far superior, fuller sound.

Could you please post your final calibration settings alluded to in the review?
Many thanks and keep up the good work

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