Sony KDL-40NX723 review

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

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Sony kdl 40nx723

It never ceases to amaze us how TV sets this slim manage to make a sound at all. But the Sony KDL-40NX723's four 10W ìInvisibleî speakers deliver a passable audio performance with TV material. They make speech sound clear and prominent at normal listening levels and handed the crying and shouting on EastEnders very nicely indeed.

It's only when you test its limits with a rip-roaring Blu-ray movie or start playing MP3s from USB flash drives that you realise how thin and strained the sound is. That's pretty much par for the course with flatscreen TVs, though.

If you want to boost bass output, the tilted Monolithic stand comes with a built-in subwoofer. The TV also boasts a range of sound modes tailored to different types of material, as well as S-Force Front Surround 3D, S Master, Dolby Digital Plus compatibility and automatic volume control.


Let's get this straight: Sony's asking price of £1,400 for the KDL-40NX723 is expensive for a 40-inch TV set. Even if you shop around online it only dips down to around the £1,100 mark. And that's before you've even thought about buying the 3D glasses or the Skype camera.

Thankfully, Sony can't be accused of short-changing you, thanks to this marvellous TV's extensive feature list. All the cutting-edge mod cons you could ever need are included, so you don't need to worry about getting your money's worth.

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