Sony KDL-55HX823 review

This slim 3D LED TV is an awesome all-rounder

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Sony kdl 55hx823

The smart TV features of the Sony KDL-55HX823 are laudable, but just as important as the content is how a TV treats low-resolution fare from YouTube, especially on a 55-inch set.

Sony's X-Reality PRO dual-chip image processing engine is a very welcome addition to the KDL-55HX823; we've seen previous incarnations work wonders.

Powered by a 14-bit (output) multi-frame video data analysis, X-Reality PRO upscales poor-quality sources – common on YouTube and elsewhere online – to fit the large screen. It also works well with still images, and can be applied to any video source.

Panel-wise, the KDL-55HX823 uses an Edge LED array around an OptiContrast panel, which sees lights on the left and right of the screen. Sony insists that the way the light works is much the same as a full (and therefore fatter, which explains its absence) LED system, where lights are clustered all across the panel.

What Sony is saying here is that the KDL-55HX823 is capable of "local dimming", despite not having local lighting. What it boils down to is a more precisely controlled backlight, although whether the end result is any nearer to a plasma (the intended result of most LED tech) will be the ultimate test.

Sony kdl 55hx823

Another panel-related feature of note is a 400Hz mode, labelled by Sony as Motionflow XR 400. That's a relatively high-end feature, and it should be more than enough to cope with image lag and motion blur issues.

If Freeview HD adds some versatility, four HDMI inputs extend this further, one of which including an Audio Return Channel. That's crucial for anyone with a pre-3D HDMI-equipped AV receiver or home cinema that can't pass 3D images and sound over HDMI.

There's also Ethernet LAN connectivity for a more reliable wired connection to a broadband router, although the Wi-Fi method worked fine in our tests. Other ins and outs include a set of component video jacks, a headphones slot, a VGA connection for a PC or laptop, a minijack for audio and a digital optical audio port.

Crucially there are two USB slots – one for playing digital media from a thumb drive, and one able to record from the Freeview HD tuner to a hard drive.

Tech Specs

Product TypeLED-LCD TV
Scan Format1080p
Standard Refresh Rate50 Hz
Digital TunerDVB-C (MPEG4), DVB-T (MPEG4)
Video Signal StandardHDTV 1080p
Number of HDMI Ports4
Number of SCART Interfaces1
Product FamilyBRAVIA HX823
3D Type3D
Brand NameSony
Screen Size139.7 cm (55")
Aspect Ratio16:9
Green CompliantYes
Green Compliance Certificate/AuthorityRoHS
Wireless LANYes
Ethernet TechnologyEthernet
Weight with Stand (Approximate)28.30 kg
Backlight TechnologyEdge LED
Operating Power Consumption188 W
Standby Power Consumption250 mW
RMS Output Power30 W
Electronic Program GuideYes
DLNA CertifiedYes
Digital Audio OutputYes
Height with Stand804 mm
Width with Stand1280 mm
Depth with Stand305 mm
Composite VideoYes
Component VideoYes
Network (RJ-45)Yes
PC StreamingYes
Internet AccessYes
Media PlayerYes
Enhanced Refresh Rate200 Hz
Height774 mm
Width1280 mm
Depth27 mm
Comb Filter3D Y/C
Sound SystemDolby Digital Plus, Dolby Pulse, Surround Sound
Product SeriesHX823
Maximum Resolution1920 x 1080
FeaturesWeb Browser, Sleep Timer, Picture in Picture, Picture and Picture (PAP), Favorite Channel Selection
ManufacturerSony Corporation
Product ModelKDL-55HX823
Product LineBRAVIA
Manufacturer Part NumberKDL55HX823BU
Manufacturer Website Address
Marketing Information

Put on a show of style and entertainment
Enjoy Full High Definition 3D on a TV that can't fail to impress. With cutting-edge Monolithic Design, an ultra-thin OptiContrast screen and a cable-free Wi-Fi connection to online entertainment, the only thing you need to worry about is what to watch.

Picture excellence in 2D and 3D
See lifelike Full HD quality in 2D and 3D. Get a smooth view of fast-action sports and movies with Motionflow XR 400. Enjoy a high contrast picture on a slim Dynamic Edge LED screen. Every pixel of your 2D or 3D picture is enhanced by our unique picture technology.

Package Contents
  • Remote Control
  • 2 x AAA Batteries
  • AC Power Cable
Limited Warranty1 Year
Weight (Approximate)23.20 kg