Optoma UHD51A 4K projector with Alexa assessment

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Good, voice activated controls for a house cinema projector could sound just like the kitchen-sink strategy to characteristic lists at first look, leaping on the buzz-word (or ought to that be ‘wake word’?) bandwagon of Amazon’s Alexa, Apple’s Siri or Google’s Assistant.

However take into consideration the setting and situation that your common projector viewing session takes place in, and it begins to make a whole lot of sense – you’re in a darkish room the place seeing buttons isn’t at all times simple, probably along with your fingers loaded up with popcorn and different treats. With the ability to shout “play the movie!” at a voice activated projector, probably put in in a bracket excessive above your head, looks like a sound transfer. 

The Optoma UHD51A places this idea into apply, and whereas it’s but to excellent the Alexa expertise, it’s exhausting to argue towards its high quality as a regular projector.

Value and availability

The Optoma UHD51A may be purchased for round £1,500 within the UK, and round $1,500 within the US, down from an RRP of $1,699. There’s a premium connected right here towards different members of the Optoma vary that supply comparable specs because of the Alexa inclusion – which you will discover pointless. The UHD50 as an example could be very shut in spec phrases, Alexa however, and retails for below $1,400. Regardless, for the sub £2k/$2k UHD projector market, what’s on provide right here is exemplary.

Design and options

The UHD51A is a beautiful projector – in as far as the world of projectors excite with their designs. Black with silver trim, it makes use of a combination of clean and textured supplies throughout its prime aspect, with venting across the exterior for warmth administration. A collection of management buttons sit alongside the highest, whereas the again consists of two HDMI HDCP v2.2 ports, VGA and RS232 ports, Ethernet, digital audio out, and USB port for taking part in again content material from the projector’s inbuilt media participant.

Chances are you’ll be annoyed to search out that there’s no type of keystone correction nevertheless. Whereas purists know that each one this does (when utilizing digital correction at the very least) knocks pixels off the general picture to be able to straighten out the ratio, it proved irritating making an attempt to make minute positioning tweaks to be able to get the image measurement wanting because it ought to. Notice that the ability cable included is sort of quick too, which might exacerbate this situation. Vertical lens shift is featured nevertheless, letting you elevate the picture above the angle that the projector sits at.

Each a USB Wi-Fi adapter for Alexa help and a distant are included within the field. The distant is small and smart laid out, although the shortage of a backlight frustrates when watching in a darkened room.


The Optoma UHD51A hits its 4K goal utilizing pixel shifting, delivering 8.three million pixels from its DLP system. Able to delivering a HDR10 picture, its quick throw lens can get you a picture as massive as 100-inches from a distance as small as round 9 ft away from the projected floor.

And that picture is an absolute corker, providing up an image richer and brighter than you’d anticipate at this price ticket, and giving the impression of brightness ranges past the 2400 lumens quoted on the field. Whilst you’re nonetheless going to get one of the best efficiency out of the UHD51A in a darkish room, even the informal residence cinema fanatic will have the ability to admire its scale and element if used throughout the day.

With its wealthy number of scenes and textures, the BBC’s Planet Earth 2 sequence on 4K Blu-Ray made the proper take a look at case for the UHD51A. From wealthy jungles to azure blue seas, the projector captured the majesty of the character documentary, revealing pin-sharp particulars, glowing gentle sources and inky blacks (when projecting in darkness, at the very least).

The Optoma UHD51A can even work its magic when lighting conditions are suboptimal, as shown by this punchy 4K image of Spider-Man on a PS4 Pro, played with just the curtains drawn.

The Optoma UHD51A may even work its magic when lighting circumstances are suboptimal, as proven by this punchy 4K picture of Spider-Man on a PS4 Professional, performed with simply the curtains drawn.

Body interpolation techniques can typically be somewhat distracting, however the PureMotion arrange with the UHD51A impresses, including simply sufficient smoothing to motion to be immersive quite than off placing. 1080p upscaling performs nicely too, with a spread of helpful image settings (together with HDR simulators, cinema and sport modes) letting you get probably the most out of the projector relying on use case and ambient gentle circumstances. The projector can get somewhat noisy when its followers kick into gear to maintain the lamp cool, however not so obnoxiously as to make it not possible to get pleasure from what you have to be listening to, too.

The projector additionally helps 3D video – you’ll want a pair of Energetic DLP Hyperlink glasses to understand this characteristic, however a viewing of Werner Herzog’s Cave of Forgotten Goals proved its price your time in case you’re nonetheless a 3D fan, with a terrific sense of depth and little annoying crosstalk to talk of.

As for sound, the 5 watt stereo audio system on board do themselves proud – sufficient to look at a fast little bit of TV at the very least. However let’s be actual right here – in case you’re projecting a 100-inch-plus image, they’re not going to chop it on your blockbuster marathons, so that you’ll want some kind of further sound system to get probably the most out of the expertise.

Alexa options

If there’s a real USP to the UHD51A, it’s its Alexa help. Whereas the projector itself doesn’t have a microphone for listening, nor the voice assistant itself constructed into the unit, it may be made to speak with the Amazon AI, permitting for fingers free management if in case you have an Echo or similarly-Alexa outfitted system.

Nevertheless, arrange isn’t straight ahead, because it proved troublesome to get the projector on-line and chatting with the Echo Dot we had been pairing it with.

However, when the 2 are working collectively, there’s some good touches right here. For example, organising the projector as a part of a bunch routine can have you ever each hearth up the projector and dim the lights from a single voice command, when you can swap enter sources, elevate quantity and extra with different voice instructions.

Is that this characteristic well worth the premium over different similarly-spec’d Optoma projectors. That’s controversial, however there’s a small pleasure in altering the settings with out fumbling for a controller.


The Alexa options could also be enjoyable however somewhat perfunctory, however every part else about this the Optoma UHD51A performs exceptionally. At this value you’re going to be exhausting pressed to discover a projector that may ship this stage of image high quality and this characteristic set extra confidently.

The Optoma UHD51A represents a terrific shift in 4K projecting high quality if you end up on a tighter funds. What’s on provide right here permits even these with smaller residing areas and extra modest financial institution balances a style of the house cinema excessive life.

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