Sony KDL-40NX723 review

3D TV more or less justifies its price tag with killer picture performance

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Sony kdl 40nx723

The KDL-40NX723 isn't the most advanced TV Sony has to offer (the KDL-40HX723 offers MotionFlow 400) but there's a definite premium vibe about the 40-inch connected TV in everything from its super-slim Monolithic design to its extensive feature list.

The inclusion of built-in Wi-Fi, 3D support, DLNA media streaming, Bravia Internet Video and some clever automation tricks makes the TV's specs list what you expect to see for this sort of money. The veritable banquet of picture processing modes and adjustments makes it a great choice for those who care about picture quality.

We liked

There's a wealth of features on board including built-in Wi-Fi, which makes it possible to access the extensive networking features with ease.

And what superb features they are, particularly Bravia Internet Video, which for our money still delivers the best range of connected TV content.

The set also delivers superb picture quality from 2D and 3D Blu-ray discs, and a vast array of picture adjustments and enhancements on board enable you to achieve your perfect picture.

The excellent operating system and i-Manual make the TV a doddle to use, too.

We disliked

Even though the Sony KDL-40NX723 comes with a hefty price tag of well over £1,000, you don't get any 3D glasses in the box. And if you want Skype that'll be another £80 please.

Streaming videos over a home network proved to be a little stuttery and frustrating, plus the internet browser is a waste of time (although you can use your smartphone as a keyboard).

Some of the MotionFlow modes introduce artefacts into the picture, and the usual flatscreen TV caveat about weedy sound applies yet again.


There's no denying that the Sony KDL-40NX723 is an expensive TV, but what that money gets you is a feature-packed, cutting-edge set that delivers excellent pictures from a variety of sources.

It's an accomplished 3D performer, and with an extensive range of picture adjustments on board you can tweak away to your heart's content.

Some minor aspects gall, but on the whole it's a mountain of pros against a molehill of cons, which means it's money well spent if you can afford it.

Tech Specs

Product TypeLED-LCD TV
Scan Format1080p
Standard Refresh Rate50 Hz
Digital TunerDVB-T (MPEG4), DVB-C (MPEG4)
Video Signal StandardHDTV 1080p
Number of HDMI Ports4
Number of SCART Interfaces1
Product FamilyBRAVIA
3D Type3D
Brand NameSony
Screen Size101.6 cm (40")
Aspect Ratio16:9
Wireless LANYes
Ethernet TechnologyEthernet
Weight with Stand (Approximate)16.90 kg
Backlight TechnologyEdge LED
Operating Power Consumption129 W
Standby Power Consumption300 mW
RMS Output Power40 W
Electronic Program GuideYes
DLNA CertifiedYes
Digital Audio OutputYes
Height with Stand618 mm
Width with Stand949 mm
Depth with Stand210 mm
Composite VideoYes
Component VideoYes
PC StreamingYes
Internet AccessYes
Media PlayerYes
Enhanced Refresh Rate200 Hz
Height587 mm
Width949 mm
Depth27 mm
Comb Filter3D Y/C
Sound SystemSurround Sound, Dolby Digital Plus, Dolby Pulse
Maximum Resolution1920 x 1080
FeaturesSleep Timer, Picture and Picture (PAP), Picture in Picture, Favorite Channel Selection, Web Browser
ManufacturerSony Corporation
Product ModelKDL-40NX723
Product LineBRAVIA
Manufacturer Part NumberKDL40NX723BU
Manufacturer Website Address
Marketing Information

Monolithic Design and an OptiContrast LED screen make it one of our sleekest and slimmest TVs yet. With an ever-expanding choice of online entertainment and new smart features, the way you watch TV will change forever.

Package Contents
  • Remote Control
  • 2 x AAA Batteries
  • AC Power Cable
Weight (Approximate)13.10 kg