Home Theater

Optoma UHD51A 4K Projector Controllable by Amazon Alexa

One of the first Amazon Alexa-controlled projectors, the Optoma UHD51A has a TI chipset to deliver 4K home theater images at $1,699.


Optoma UHD51A 4K Projector Controllable by Amazon Alexa
The newly announced 4K Optoma UHD51A with Alexa features UltraHD 4K playback and up to 2,400 lumens of brightness.
Robert Archer · May 15, 2018

Combining two of the hottest technologies in consumer electronics, the affordable $1,699 Optoma UHD51A projector offers 4K images and Amazon Alexa voice command capabilities. 

Through the projector's companion SmartProjection for Smart Home skill, integrators can setup a fully voice-controlled home theater room that includes audio, projection screens, lighting and video through the implementation of the UHD51A. 

"Optoma's leadership in the consumer home theater space has largely been attributable to our ability to design and deliver projectors that leverage the latest innovations and technologies to deliver a great entertainment experience at an affordable price point," notes Brian Soto, head of product management, Optoma Technology

"With smart home adoption on the rise and voice increasingly becoming a preferred way for consumers to interface with their electronics we prioritized delivering this feature to our audience."

Related: Review- Optoma UHZ65 4K Laser Projector Offers Quality at an Affordable Price-point

According to Optoma and research from Alpine.AI, there are approximately 8.2 million people that own an Amazon Alexa product, issuing more than one billion voice searches per month.

Using the voice options for the UHD51A, homeowners can issue voice commands to turn the projector on or off and to change inputs.

Optoma UHD51A Projector Also Delivers 4K Pictures

The heart of the UHD51A is its ability to produce UltraHD 4K images. The projector is rated to produce up to 2,400 lumens of brightness, and contrast ratios as high as 500,000:1.

Compatible with the high dynamic range (HDR) HDR10 format, the UHD51A also complies with the Rec.2020 and DCI-P3 color gamuts, and it also incorporates a built-in 4K HDR media player with an Android operating system (OS). 

Some of the installation options built into the projector include a pair of HDMI 2.0 inputs that provide compatibility with the HDCP 2.2 copyright protection scheme and other features such as a 1.3x optical zoom and 15 percent vertical lens shift provide installation flexibility. 

Optoma HD51A Summary of Features

  • Resolution is 3840 x2160
  • Produces brightness levels up to 2,400 ANSI lumens
  • Produces contrast levels as high as 500,000:1
  • Supports HDR10 high dynamic range format
  • Supports the Rec. 709, DCI-P3 and Rec. 2020
  • Two HDMI 2.0 ports with HDCP 2.2 compatibility
  • Throw ratio of 1.21 to 1.59
  • 1.3x optical zoom
  • Vertical lens shift up to 15 percent
  • MHL 2.1 support 
  • Alexa Smart Skill voice control options


  About the Author

Bob is an audio enthusiast who has written about consumer electronics for various publications within Massachusetts before joining the staff of CE Pro in 2000. Bob is THX Level I certified, and he's also taken classes from the Imaging Science Foundation (ISF) and Home Acoustics Alliance (HAA). Bob also serves as the technology editor for CE Pro's sister publication Commercial Integrator. In addition, he's studied guitar and music theory at Sarrin Music Studios in Wakefield, Mass., and he also studies Kyokushin karate at 5 Dragons in Haverhill, Mass. Have a suggestion or a topic you want to read more about? Email Robert at rarcher@ehpub.com

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  Article Topics


Home Theater · Projectors & Screens · Control & Automation · News · Products · 4K · Alexa · HDR10 · Optoma · Voice Control · All Topics
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