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Optoma UHD51A 4K UHD Smart Home Theater Projector, Works with Amazon Alexa & Google Assistant

3.9 3.9 out of 5 stars 175 ratings

To see product details, add this item to your cart. You can always remove it later.
2400 lumens/2018 Model
Single
This item is certified to work with Alexa
WORKS WITH ALEXA
Add voice control by combining with an Alexa device
  • This item
  • +
  • Required
  • =
  • “Alexa, turn on the TV.”

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Purchase options and add-ons

Brand Optoma
Special Feature SmartProjection for Smarthome (Alexa Skills): Alexa Smarthome Skills and Custom Skills / Power Projector On/Off, Increase and decrease volume, change inputs, change Display Mode, change HDR Picture Modes, and change PureMotion (MEMC) settings., Vertical Lens Shift: 15% offset (with tolerance +/- 5%) See more
Connectivity Technology USB, wireless
Display resolution 4096 x 2160

About this item

  • COMPATIBLE WITH ALEXA AND GOOGLE ASSISTANT: With Echo devices or Google Home, take control of the UHD51A with voice commands to power on/off, adjust volume, change inputs, and control USB media playback
  • TRUE 4K ULTRA HD: Experience high-quality home cinema feel with 4K Ultra HD with 8. 3 million distinct addressable on-screen pixels, enabled by the Texas Instruments 4K UHD DLP chipset
  • HDR COMPATIBLE: HDR10 technology with DCI-P3 wide color gamut support displays everything in the REC. 2020 colors to match television and film quality; also providing brighter whites, deeper blacks, and greater color depth
  • ULTRA-SHARP PICTURE: Ultra Detail technology ensures enhanced image sharpness with a higher frame rate to deliver a crystal clear picture
  • FLEXIBLE INSTALLATION: Whether ceiling mounted or placed on a table, get your picture just right with 1. 3x manual and 0. 8 – 2. 0 digital zoom, 1. 21 – 1. 59, +10% throw ratio, vertical lens shift and keystone correction
  • 4K UHD GAMING-READY WITH HDR: Connect with the latest consoles and gaming PCs for an immersive experience
  • LONG LAMP LIFE: Enjoy up to 15, 000 hours of lamp life enabling an average of 4 hours of viewing time every day for 10 plus years

Important information

Visible screen diagonal

300" / 762 cm

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Optoma UHD51A 4K UHD Smart Home Theater Projector, Works with Amazon Alexa & Google Assistant
Optoma UHD51A 4K UHD Smart Home Theater Projector, Works with Amazon Alexa & Google Assistant
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Price$1,112.48$1,154.99$14,990.00-27% $2,181.74
List:$2,999.99
$5,998.00-13% $2,597.99
List:$2,997.99
Delivery
Get it Apr 3 - 5
Get it Apr 3 - 10
Get it as soon as Tuesday, Apr 2
Get it as soon as Tuesday, Apr 2
Get it Mar 30 - Apr 1
Customer Ratings
Brightness
4.1
4.5
4.7
4.1
Picture quality
4.1
4.3
4.9
4.1
Value for money
3.6
3.9
3.9
Sold By
ARK DEALS ™ ✅ 1000s Deals on Best Sellers!
Out Of This World Electronics
BUYDIRECT & SAVE, USA
Amazon.com
Amazon.com
The Big Screen Stores
hardware interface
usb
usb
d sub
bluetooth
hdmi
hdmi
display resolution
1920 x 1080
3840 x 2160 pixels
4096 x 2160p
3840 x 2160
3840x2160
3,840 x 2,160
brightness
2400
2400
2000
2700
2000
2200
native resolution
4096 x 2160
4K UHD (3840 x 2160) @ 60Hz with XPR Technology
4096 x 2160
3840 x 2160
3840 x 2160
3840 x 2160
image contrast ratio
500000:1
500000:1
1000000:1
2M:1
1000:1
max throw distance
26.57 feet
13.12 feet
2.21 feet
0 feet
min throw distance
3.93 feet
5.9 feet
1.38 feet
0 feet
controller type
Amazon Alexa
Amazon Alexa, Alexa
Button Control
Button Control
Button Control
Voice Control

From the manufacturer

amazon alexa compatible; optoma projector; optoma 4k projector; 4k projector; uhd projector; alexa

Key Features

Incredible color and contrast

Bring the cinema experience to your home theater with High Dynamic Range (HDR) compatibility and wide color gamut for rich life-like color and contrast. See brighter whites, deeper black-levels and vivid colors with HDR10 support.

Intuitive voice control

Expand your home theater with voice commands including powering on and off, switching sources, adjusting the volume and activating media player commands.

Easy file playback

Experience stunning 4K HDR video file playback with the integrated media player. Simply insert a flash drive with 4K videos or images, launch the media player and choose your file. Music playback is also supported.

Blu-ray 3D-ready

Immerse yourself in the movie with eye-popping Blu-ray 3D compatibility. (Requires optional DLP-Link 3D glasses and Blu-ray 3D player).


UHD51A roomshot
Key Features:
  • 4K UHD (3840x2160) resolution
  • 2400 lumens of brightness
  • Up to 500,000:1 contrast ratio with Dynamic Black
  • 1.21 – 1.59 throw ratio
  • Vertical lens shift

Optoma UHD51A

Expand your smart home with a smart projector

Take control of your home theater with voice commands. With the Alexa smart home skill or Google Actions, control your 4K UHD 2,400 lumen Optoma UHD51A projector with intuitive voice control and easy integration using Echo and Google Assistant devices. Use voice commands to power the projector on and off, change volume, change input source and control the USB media player.

UHD51A UHD50 UHD60
Customer Reviews
3.7 out of 5 stars
877
3.8 out of 5 stars
425
Brightness, Contrast Ratio, and Native Resolution 2400 lumens, 500,000:1, 3840x2160 4K UHD 2400 lumens, 500,000:1, 3840x2160 4K UHD 3000 lumens, 1,000,000:1, 3840x2160 4K UHD
Alexa & Google Assistant-compatible - -
Inputs 2xHDMI 2.0 (w/ HDCP 2.2, MHL 2.1 and Full 18Gbps), VGA-In, Audio-In (3.5mm), Audio-Out, SDPIF Out (Optical), USB-A Port (Service), USB-A (Alexa Wi-Fi), USB-A (4K UHD USB Media Player), USB-A (Wi-Fi Wireless Display), RJ45, RS232C 2xHDMI 2.0 (w/ HDCP 2.2, MHL 2.1 and Full 18Gbps), VGA-In, Audio-In (3.5mm), Audio-Out, SDPIF Out (Optical), USB 2.0 Port (Service), USB-A Power, RJ45, RS232C 1xHDMI 1.4 port, 1xHDMI 2.0 (w/ HDCP 2.2, MHL 2.1 and Full 18Gbps), VGA-In, Audio-In (3.5mm), Audio-Out, SDPIF Out (Optical), USB 2.0 Port (Service), USB-A Power, RJ45, RS232C
1.3 x Zoom & Vertical Lens Shift (15%) 1.6x
HDMI2.0 w/ HDCP 2.2 Yes Full 18Gbps Yes Full 18Gbps Yes Full 18Gbps
HDR10 w/ DCI-P3/REC.2020
4K UHD HDR Media Player - -
PureMotion (smooth judder-free video) - -
Blu-ray 3D 1080p - -
Keystone Correction - -

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What's in the box

  • projector
  • Product information

    Technical Details

    Additional Information

    Warranty & Support

    Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.
    Product Warranty: For warranty information about this product, please click here [PDF ]

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    Product guides and documents

    Product Description

    Take control of your home theater via voice commands using Alexa or Google Assistant. With smart home skills, control your 4K UHD 2, 400 lumen Optoma UHD51A projector with intuitive voice control and easy integration with Echo or Google Home devices. Use voice commands to power the projector on and off, change volume, change input source and control the USB media player. The Optoma UHD51A's 4K ultra high definition resolution, 2, 400 lumens of brightness, wide color gamut support and up to 500, 000: 1 contrast ratio combined with HDR compatibility delivers amazing detail, clarity and vibrant colors that bring your favorite movies and video games to life. The latest Texas Instruments 4K UHD DLP chipset with high-performance video processing technology drives the Optoma UHD51A and meets the Consumer Technology Association's definition of true 4K Ultra HD. This innovative fast-switching technology displays 8. 3-million simultaneous distinct pixels at screen sizes up to 300" for an immersive home cinematic experience. A pair of HDMI 2. 0 inputs with HDCP 2. 2 support ensures the Optoma UHD51A works with the latest 4K UHD video playback devices and game consoles with HDR at 60Hz refresh rates for unmatched smoothness. Optical zoom (1. 3x) and 15% vertical lens shift provide installation flexibility for most any environment.

    Customer reviews

    3.9 out of 5 stars
    3.9 out of 5
    175 global ratings

    Customers say

    Customers like the picture quality, value, brightness and 3D of the video projector. For example, they mention it has a very good picture, crystal clear and that it's a pretty good product for the price. Some appreciate the 3D, saying it'll look good to them. That said, opinions are mixed on quality, ease of setup, noise, and wifi connection.

    AI-generated from the text of customer reviews

    52 customers mention44 positive8 negative

    Customers like the picture quality of the video projector. They mention it has a very good picture, crystal clear, and bright. Some say the 4K is equally beautiful, and the colors are more vibrant. Some mention that the depth effect is perfect, and that the projector is amazing with 4K clarity.

    "...the 1080P is more detailed, the colors more vibrant, and the picture brighter, up to a normal viewing level..." Read more

    "...It has given my theater a considerable boost in picture quality, and I finally get to enjoy 4K content the way it was meant to be seen...." Read more

    "...d. after the headache 3D is quite fun and looks good to me. it would probably be better if I could afford a bigger screen space...." Read more

    "...Plenty bright for us and 3D is awesome! The glasses are super cheap too if you look on Amazon...." Read more

    20 customers mention20 positive0 negative

    Customers are satisfied with the value of the video projector. They mention that it is a great buy, and the picture quality surpassed the price.

    "...reasonable price (below $2,000); an enhancement of the 2K quality of 3D 1080Px2 by..." Read more

    "...Blown away by the picture and quality especially for the cheap price...." Read more

    "...Bought a reasonably priced screen, cabling and 3D glasses to go with this system and still cheaper than investing in a 4K HDTV...." Read more

    "A great projector for the price.3D - worksHDR - works4K - worksPicture quality - looks great to me......" Read more

    14 customers mention11 positive3 negative

    Customers like the brightness of the video projector. They say that it has amazing brightness, with a 135-inch screen and brightness to spare. Some customers also mention that the daylight viewing is ok, unless there is direct sunlight.

    "...Support for viewing 3D Blu-ray content? Check.Enough brightness to use outside of a bat cave? Check...." Read more

    "...you don't mind or see the rainbow effect then the image is beautiful, bright, and it is very quite...." Read more

    "...Daylight viewing is ok to me unless direct sunlight. Menu isn’t that great. The setup menus have graphics while the image menues do not...." Read more

    "...other lesson learned, not a fault of this projector is light control is just so critical for using a projector...." Read more

    11 customers mention11 positive0 negative

    Customers like the 3D feature of the video projector. They say it's great, fun, and the best 4K projector that supports 3D. Some mention that the fan is quiet. Overall, most are satisfied with the product's 3D capabilities.

    "...d. after the headache 3D is quite fun and looks good to me. it would probably be better if I could afford a bigger screen space...." Read more

    "...Plenty bright for us and 3D is awesome! The glasses are super cheap too if you look on Amazon...." Read more

    "...I bought this model because it works with 4K discs and is one of the few options if you still want to play your 3D media...." Read more

    "...-3d is amazing and easily syncs to the projector , girlfriend enjoys the 3d from the projector even more than from the IMAX theater down the..." Read more

    39 customers mention26 positive13 negative

    Customers are mixed about the quality of the video projector. Some mention that it's a very good product with many nice features, while others say that it is not very useful and starts behaving strangely.

    "...is rightly touted as an excellent 4K projector, it's ALSO a fabulous 3D projector for those of us with two working eyeballs that savor such..." Read more

    "...Plenty bright for us and 3D is awesome! The glasses are super cheap too if you look on Amazon...." Read more

    "...to take these issues into account, and this projector may not work in every room...." Read more

    "...I think the projector quality in dark is awesome. It’s flawless even on my bare wall( haven’t bought the screen yet). Crystal clear picture quality...." Read more

    12 customers mention5 positive7 negative

    Customers are mixed about the noise of the product. Some mention it's quieter, while others say it'll be louder in high altitude mode. The cooling fan can be a little noisy. Overall, the opinions are mixed and depend on personal preferences.

    "...The first thing I noticed after installing it is that it was whisper quite, even when I put to UHD51a in bright mode, I could hardly hear the fan...." Read more

    "...-puremotion - I can’t really tell if it works but it seems to jutter on movies when it can’t predict things but I’ll know more when football starts..." Read more

    "...Noise level is bearable. It is not super quiet, however when a movie is going on, the noise doesn’t bother you at all." Read more

    "...My only complaint is that the motor/fan or whatever is kinda loud. I’m getting more used to it though...." Read more

    10 customers mention5 positive5 negative

    Customers are mixed about the ease of setup of the video projector. Some mention that it was a lot of steps but pretty simple to setup, and works right out of the box, while others say that the setup was wildly off out of box, with very limited options for setup.

    "...Next I set up Alexa, it was a lot of steps but was pretty simple to setup. I was able to turn the projector off with my voice command once...." Read more

    "...The setup was a bit of a nightmare, but now it's working on the second day. As far as the picture goes, it's crisp and clear...." Read more

    "...has it all; 3D, 4K HDTV, with all the latest formats and works right out of the box...." Read more

    "...My frustrations with the projector continued. The keystone issue was very tedious but I've also had many many HDMI sync/negotiation issues...." Read more

    10 customers mention3 positive7 negative

    Customers are mixed about the wifi connection of the video projector. Some mention that it works awesome with Alexa, while others say that it won't connect to WiFi. Some say that the 3D does not work, and others say the Alexa connection didn't work when they got it.

    "...Alexa is still not working and I have given up on setting that up for now, but using a voice command to turn it on is that not that big a deal as..." Read more

    "...for wifi connected, and can connect to my network, but can not get the wifi to turn on...." Read more

    "...flat on the top so I mounted it upside down on the shelf and it works perfectly! We love it...." Read more

    "...takes time to warmup- alexa connection is a hassle (optoma's fault) their mobile app is terrible, but managed to get it done...." Read more

    Excellent projector with software flaws
    4 Stars
    Excellent projector with software flaws
    Let me start by saying this is an amazing projector. I prefer watching this over my 55" 4K curved I bought 5 years ago (I paid roughly the same for each). I bought this because I wanted to be able to watch TV with the blinds open. While I can achieve this, it is still a white washed image (could also be from the white elite screen I use), and having the blinds closed is by far the best. The whites are white, and it makes me feel like I am watching a large TV screen, instead of a projector (those who have bought cheap end projectors know what I am talking about). I did not think that I would like to watch the 3D movies as much as I do. It looks much better than any 3D I have seen at Imax or theater, due to needing battery powered glasses. The 4K is clear, I can walk right up to my 150" screen and see clarity instead of pixel blur. Just note, if you are building a computer and want a 4K optical drive, none of the optical drives on the market support AMD motherboards, only Intel (wish I knew this before spending a small fortune on AMD computer parts). The short comings on this projector are all software related in my eyes. I have the supplied dongle for wifi connected, and can connect to my network, but can not get the wifi to turn on. When I click the enter button to turn on, it reverts back to off. I contacted support and they basically told me to refer to the online manual, which I did, which doesn't help my situation. The other flaw I found is the USB media drive support. I have plugged a few flash drives in and it won't read the media I put on it (all supported files per their manual). I am praying the first firmware update to this projector fixes those issues.
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    Top reviews from the United States

    Reviewed in the United States on October 21, 2018
    52 people found this helpful
    Report
    Reviewed in the United States on August 24, 2018
    Style: 2400 lumens/2018 ModelPattern: SingleVerified Purchase
    109 people found this helpful
    Report
    Reviewed in the United States on September 26, 2018
    Style: 2400 lumens/2018 ModelPattern: SingleVerified Purchase
    10 people found this helpful
    Report

    Top reviews from other countries

    Paul S
    5.0 out of 5 stars Can't beat this for the price IMHO
    Reviewed in Canada on September 19, 2019
    Style: 2400 lumens/2018 ModelPattern: SingleVerified Purchase
    One person found this helpful
    Report
    Ronald D.
    4.0 out of 5 stars Excellent picture for the price but not too bright or dark. Loads fast!
    Reviewed in Canada on October 26, 2022
    Style: 2400 lumens/2018 ModelPattern: SingleVerified Purchase
    Amazon Customer
    1.0 out of 5 stars Just don’t touch this machine
    Reviewed in Canada on November 21, 2019
    Timothy
    5.0 out of 5 stars Fantastic projector!
    Reviewed in Canada on May 8, 2019
    One person found this helpful
    Report
    Michael Maliczewski
    3.0 out of 5 stars Pay for the extended warranty
    Reviewed in Canada on July 28, 2019
    Style: 2400 lumens/2018 ModelPattern: SingleVerified Purchase
    2 people found this helpful
    Report