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Optoma UHD55

4K home theater projector with HDR

Item # 343UHD55

This projector delivers an ultra-fast 240Hz refresh rate for 1080p gaming on a massive scale.

This projector delivers an ultra-fast 240Hz refresh rate for 1080p gaming on a massive scale.

California customers:
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Item # 343UHD55

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About the Optoma UHD55

Emily S.

Massive movies and games

The UHD55 is a great way to enjoy immersive movie nights at home. It offers a 4K UHD picture with Wide Color Gamut mode and support for HDR (High Dynamic Range) so you get lifelike color and detail on screens up to 300 inches. And it produces 3,600 lumens of brightness, so you can enjoy a vivid picture even in rooms with some ambient light.

Massive movies and games

The UHD55 is a great way to enjoy immersive movie nights at home. It offers a 4K UHD picture with Wide Color Gamut mode and support for HDR (High Dynamic Range) so you get lifelike color and detail on screens up to 300 inches. And it produces 3,600 lumens of brightness, so you can enjoy a vivid picture even in rooms with some ambient light.

This projector is also a great option for gamers who want to upsize their play area. It has an input response time of 16.9ms for 4K at 60Hz or a lightning fast 4ms for 1080p at 240Hz — great for fast-paced console or PC gaming. 

Smart features

The UHD55 includes access to apps via the Optoma Marketplace so you can use streaming services like Netflix® and YouTube without having to hook up a separate source. Amazon Alexa and Google Assistant compatibility means you can control the projector's basic commands with your voice control device of choice.

DLP micromirror technology

If you've been to a movie theater in the last twenty years, there's a good chance you've seen a DLP (Digital Light Processing) projector in action. Those professional projectors are massive and expensive, and they feature three DLP imaging chips — one each for the red, green, and blue color primaries.

Most home DLP projectors, including the UHD55, use a single DLP chip with a color wheel to reproduce the full color spectrum. The underlying technology sounds like something out of science fiction: DLP chips use millions of tiny mirrors to control the individual pixels that make up the image. 

The way it does 4K

The chip in this projector has a native pixel resolution of 1920 x 1080. To display all the pixels needed for 4K, each frame of video is split horizontally and vertically four ways, and they're displayed very rapidly one after the other, with the pixels shifted diagonally. Your eyes perceive it as a single fluid image containing all of the original detail in the 4K video signal. 

Simple setup

The UHD55 sets up easily on a table, or you can pick up a bracket and ceiling-mount it. Its 4-corner adjustment and 2D keystone correction features add flexibility to your installation options.

The projector's built-in speakers can also help facilitate a quick setup. But if you want a little more, use the optical digital audio or minijack audio output to connect to a sound system. It has two HDMI inputs for connecting your high-definition sources.  

For the best picture quality from any projector, we recommend using a projector screen.


Product highlights:

  • uses single-chip DLP system with XPR pixel-shifting technology to display true 4K UHD resolution (3840 x 2160)
  • widescreen 16:9 aspect ratio
  • recommended image size: 34" to 300"
  • light output: 3,600 lumens
  • covers 95% of the DCI-P3 color space (the digital cinema standard)
  • dynamic black technology for enhanced contrast and black level
  • 1,200,000:1 contrast ratio
  • HDR-compatible for lifelike texture and detail (HDR10 and HLG)
  • supports 3D content
Smart features:
  • built-in Android™ OS lets you access your favorite streaming services like Netflix and YouTube without having to hook up a separate source
  • compatible with Google Assistant and Amazon Alexa devices for voice control (sold separately)
Gaming features:
  • enhanced gaming mode with ultra-fast response time supported on HDMI input 1
    • 4K at 60Hz with 16.9ms input lag
    • 1080p at 240Hz with 4ms response time
Image adjustments:
  • 1.3X zoom lens (manual)
  • 4-corner geometric adjustment helps with off-center placement
  • horizontal keystone correction: +/- 40°
  • vertical keystone correction: +/- 40°
  • adjust for curved screens with 3x3 warping correction
  • 2 HDMI 2.0 inputs
  • VGA input for connecting a computer
  • two USB Type-A ports
  • one 3.5mm stereo minijack input and 1 stereo minijack output
  • RS-232C port for external control of the projector via compatible computer or third-party control device
  • detachable power cord
  • S/PDIF optical digital audio output
  • 12-volt trigger output for controlling a motorized screen
General features:
  • 240-watt lamp (lasts up to 15,000 hours in Dynamic mode)
  • quiet cooling fan (26 dB)
  • built-in speaker (10 watts)
  • backlit remote control
  • projection method: front, rear, upside down
    • can be ceiling-mounted with bracket (sold separately)
  • dimensions (measured by Crutchfield): 12-1/2"W x 4-3/4"H x 13-1/8"D (includes allowance for cable connections)
  • weight: 8.6 lbs.
  • warranty: 1 year parts & labor (90 days on lamp)
  • Our 60-day money-back guarantee
  • this projector does not include any type of built-in TV tuner
  • MFR # UHD55

What's in the box:

  • Video projector
  • 6' AC power cord
  • Remote control
  • CR2025 battery
  • USB/WiFi adapter
  • Quick Start User Manual

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More details on the Optoma UHD55

Stacey B.

Features & specs

Native Resolution (pixels) 1920 x 1080
Resolution with Pixel Shift 4K UHD (8.3 million pixels)
Picture Size Range 34 to 300 inches
Display Technology DLP
3D-Capable Active (emitter built in)
Aspect Ratio 16:9
Contrast Ratio 1,200,000:1
Dynamic Iris No
Brightness (in ANSI Lumens) 3600
Mounting Options and Design
Ceiling Yes
Tabletop Yes
Ultra Short Throw No
Portable Design No
HDR (High Dynamic Range)
HDR10 Yes
HDR10+ No
Dolby Vision No
Next-gen Gaming Features
VRR (Variable Refresh Rate) No
ALLM (Auto Low Latency Mode) No
4K/120Hz HDMI Inputs None
Smart TV Features
Apple TV App No
Apple AirPlay 2 No
Android TV Yes
Chromecast Built-in No
HDMI Inputs 2
HDMI Version 2.0
Audio Return Channel No
Wireless HDMI Input No
Audio Output 3.5mm, Optical
USB Media Port 3
RS-232 Port Yes
Built-in Speakers Yes
Wireless Features
Bluetooth No
Wi-Fi Yes
Other Info
Light Source Lamp
Approximate Lamp Life 4000-10000 hrs
Bulb Wattage 240
Vertical Lens Shift Yes
Horizontal Lens Shift No
Vertical Keystone Correction Yes
Horizontal Keystone Correction Yes
Fan Noise 26dB(typ)/28dB(max)
Width (inches) 12-1/2
Height (inches) 4-3/4
Depth (inches) 13-1/8
Weight 8.6 lbs
Parts Warranty 1 Year
Labor Warranty 1 Year
Type of Warranty Service In-home or Carry-in
The Optoma UHD55 replaces these items:

Product Research



DLP Projector: The Optoma UHD55 projector incorporates DLP technology from Texas Instruments (TI), which creates razor sharp pictures and amazing videos with incredible colors and brightness, while also providing reliability and longevity. It can be used with 30" to 300" screen sizes.

  • DLP is a reflective technology and can deliver images with both high native ANSI contrast (1,200,000:1) and exceptional brightness (3600 lumens), creating a picture that is natural and life-like.
  • Video and graphics produced by the latest DLP technology are sharper because the mirrors on the DLP chip are so close together that the gaps between pixels in an image are less noticeable. Spaced less than one micron apart, its mirrors create a crisp, detailed image.
  • The inherent speed of DLP technology means that Optoma projector can output video and images at an astonishing rate of 240Hz (1080p), 120Hz (1080p), or 60Hz (4K) for clear and seamless motion.

XPR 4K Pixel-Shift Technology: Texas Instrument's XPR Technology is a pixel-shifting technology that helps the DLP projector achieve CTA (Consumer Technology Association) approved 4K UHD (3840 x 2160) resolution. XPR Technology utilizes lightning fast pixel-shifting that creates pixels horizontally and vertically to perfectly quadruple the DLP projector's 0.47" DMD 1080p chip and generate 8.3 million distinct pixels on-screen. That's 4x more detail than Full HD 1080p and more than 2x the detail of Epson's 4K Pro UHD technology, which delivers just 4.1 million pixels.

  • 4K UHD Resolution: 4K UHD resolution delivers sharper, life-like images and richer colors - allowing you to sit closer to the screen and enjoy a more immersive experience.
  • 4K UHD Upscale: The Optoma UHD55 projector will also upscale lower resolution source content to 4K UHD. It will upscale WXGA, 720p, 1080p, WUXGA, and 1440p video resolutions to 4K (3840 x 2160) @ 60Hz.

Note: The Optoma UHD55 is not Native 4K. It uses pixel-shifting technology to create a 4K display image from a 1080p DLP chip.

Projection Lens: The Optoma UHD55 features projection lens with a focal length of 12.81mm to 16.74mm and throw ratio of 1.21:1 to 1.59:1. The projection lens offers a 1.3x zoom with a manual zoom lever and focus ring to make sure your projected image looks great on screen. The lens has a focus distance of 3.9' to 26.5'.

  • Lens Shift: To adjust the image position on-screen, turn the lens shift dial clockwise or counterclockwise to adjust the position of the projected image vertically.
  • Keystone Correction: The projector offers manual and auto keystone correction. Keystone Correction adjusts the image distortion caused by tilting the projector. It has a vertical and horizontal keystone correction of +/- 40 degrees.
  • Four Corner: This setting allows the projected image to be adjusted from each corner to make a square image when the projection surface is not level.
  • 3x3 Warp: This setting adjust the image distortion by 9 points of geometric correction.

Amazing Color Technology: Watch your movies, TV shows and play games with stunning colors in any environment. Optoma projectors provide reliable performance suitable for any content and environment. The UHD55 is capable of reproducing the Rec.709 color gamut, the international HDTV standard to guarantee accurate reproduction of cinematic color exactly as the director intended. It can even produce more saturated colors for a more vibrant looking image, great for gaming and animated movies.

  • BrilliantColor: BrilliantColor technology utilizes a new color-processing algorithm and enhancements to enable higher brightness while providing true, more vibrant colors in picture.
  • CMS (Color Management System): Its CMS (Color Management System) displays accurate lifelike colors to best match your viewing content and environment; this unique feature provides you with the flexibility to fine-tune the color settings for optimal precision.

PureMotion (24p): Using sophisticated frame-interpolation technology, advanced motion control processing eliminates motion blurring or image judder, even in high-speed action consequentialness is a form of video processing with an attempt to make video filmed in 24fps to be more smooth and to compensate for motion blur. The processing will generate transitional frames in between the existing ones to reduce motion judder. You will enjoy smooth fast-moving scenes with PureMotion.

HDR Compatible: The Optoma UHD55 is capable of receiving and displaying HDR content via its HDMI 2.0 input. HDR (High Dynamic Range) enhances the image brightness and contrast for more detail and texture with a greater sense of depth in order to produce a more natural and life like image. The projector is compatible with HDR10 and HLG formats (not compatible with HDR10+ or Dolby Vision). You can choose between 4 HDR Picture Modes to adjust the dynamic range according to the video content or environment.

  • Bright: Choose the Bright Mode for brighter and more saturated colors.
  • Standard: Choose Standard Mode for natural looking colors with a balance of warm and cool tones.
  • Film: Choose Film Mode for improved motion and film-like image.
  • Detail: Choose Detail Mode for improved detail and image sharpness.

Enhanced Gaming Mode: Enhanced gaming mode optimizes the UHD55 for maximum contrast and vivid colors to capture every detail. It also reduces input lag for lightning-fast response times (16.7ms response time in 4K at 60Hz and 4ms in 1080P at 240Hz). Enjoy ultra-smooth fluid motion and reduced ghosting. A high refresh rate makes it easier to keep track of the action, giving you a better chance of hitting your target earlier. Ideal for fast action gaming.

3D-Ready: The Optoma UHD55 can display 1080p 3D content from almost any 3D source, including 3D Blu-ray players, 3D broadcasting, and the latest generation games consoles. You'll need a pair of Optoma's DLP Link active shutter 3D Glasses (sold separately - not available at Crutchfield). 3D content is available in 720p or 1080p (not 4K).

Display Modes: You can choose from a variety of factory optimized display mode presets to suit your source content, as well as manually adjust picture settings to suit your personal preference.

  • Reference: This mode is intended to reproduce as close as possible the image the way the movie director intended. Color, color temperature, brightness, contrast and gamma settings are all configured to standard reference levels.
  • HDR/HLG: HDR Mode decodes and displays High Dynamic Range (HDR) content for the deepest blacks, brightest whites, and vivid cinematic color. This mode will be automatically enabled if HDR is set to On and HDR Content is sent to the projector. There is also a dedicated HLG mode for HDR content that uses the Hybrid Log-Gamma format.
  • HDR SIM: This mode is used to enhance non-HDR content with simulated High Dynamic Range (HDR). Choose this mode to enhance gamma, contrast, and color saturation for non-HDR content (720p and 1080p Broadcast/Cable TV, 1080p Blu-ray, non-HDR Games, etc). This mode can only be used with non-HDR content.
  • Cinema: The Cinema Mode provides the best colors for watching movies.
  • Game: Select Game Mode to increase the brightness and response time level for enjoying video games.
  • Bright: The Bright mode offers maximum brightness.
  • 3D: 3D Mode allows you to enjoy a three-dimensional effect from 3D content; 3D active glass are required and sold separately.
  • ISF: ISF allows you to save your calibrated day and night mode settings for the highest possible viewing experience.
  • User: The User Mode allows you to manually adjust the projector's Brightness, Contrast, Sharpness, Color, Tint, Gamma, Color Temperature, Color Space, and RGB.

Mounting Options: The Optoma UHD55 is designed to be installed in one of 4 possible positions. It can be tabletop or ceiling mounted in front of or behind your projection screen (ceiling mounting bracket sold separately). The projector should be placed flat on a surface and 90-degrees (perpendicular) to the screen. The projector is equipped with three adjustable feet for adjusting the image height when installing the projector on a tabletop. There are three M4 threaded inserts on the bottom of the projector to attach a ceiling mount bracket (sold separately).

  • The tilt angle of the projector should not exceed 15 degrees, nor should the projector be installed in any way other than the tabletop and ceiling mount, otherwise lamp life could decrease dramatically, and may lead to other unpredictable damages.
  • Allow at least 11.8125" on both the left and right sides of the projector, as well as allow at least 3.9375" above and behind the projector for proper ventilation.

Note: Your room layout or personal preference will dictate which installation location you select. Take into consideration the size and position of your screen, the location of a suitable power outlet, as well as the location and distance between the projector and the rest of your audio/video equipment.

Projection Distance: The further away the projector is placed from the screen the projected image size increases and vertical offset also increases proportionally. See chart below for recommended projector distance based on size of screen; or use the Optoma Projection Calculator to assist you with placement of the projector.

Screen Size Throw Distance
40" 42.1" to 55.5"
60" 63.4" to 83.1"
90" 94.9" to 124.8"
100" 105.5" to 138.6"
120" 126.4" to 166.1"
150" 158.3" to 207.9"
200" 211" to 277.2"
250" 263.8" to 346.5"
300" 316.9"

Wall Color Adjustment: If you are not going to be using a projection screen and do not have a white wall, you can use the projector's Wall Color adjustment feature. No problem! With the Wall Color setting you can alter the projected image based on the color of your wall. With six options to choose from you can easily adjust for blackboard, light yellow, light green, light blue, pink and grey walls to get the most accurate color gamut.

Integrated Speaker System: The Optoma UHD55 is equipped with an integrated speaker system featuring two full-range transducers powered by a 10 watt x 2 channel amplifier.


Wired or Wireless Network Connection: The Optoma UHD55 is equipped with a Ethernet (RJ-45) LAN jack and comes with a USB/WiFi adapter to connect the UHD55 to your network router and ISP (internet service provider). The Ethernet jack provides a wired network connection, while the USB/WiFi adapter delivers a wireless network connection. The USB/WiFi adapter supports dual-band 2.4GHz/5GHz WiFi (802.11ac). The USB/WiFi adapter plugs into one of the USB 2.0 Type-A ports (not labeled "Service" on back of the projector. Either network connection provides access to select entertainment apps from Android TV; as well as enables screen mirroring for Apple iOS, Android, Windows, and Mac devices.

  • Android TV Apps: The UHD55 projector features a customize version of Android TV that gives you access to select online entertainment services such as Amazon Prime Video, Netflix, Hulu Live, YouTube, Spotify, and more. Subscriptions and fees will apply. Not all Android TV apps will be compatible.
  • Creative Cast: Wirelessly display and share content on your projection screen using the Creative Cast app or desktop software. You'll be able to mirror your Apple iOS, Android OS, Windows, MacOS and Chrome device at the touch of a button. You can also wirelessly cast images and documents stored on your mobile device. In addition, the app acts as a wireless mouse and keyboard allowing you to control your projector.

HDMI 2.0 Inputs: The Optoma UHD55 is outfitted with two HDMI 2.0 inputs for connection of a satellite receiver/cable box, Blu-ray player, game system or computer. The HDMI 2.0 inputs support up to a 4K/60Hz (3840 x 2160) video signal, compatible with HDR (High Dynamic Range) content, and comply with HDCP 2.2 for playback of copyrighted 4K/HDR material. The HDMI inputs will also support playback of copyrighted 480i/p, 720p, and 1080i/p content.

Note: There are no analog composite or component video inputs.

Three USB Ports: There are three USB 2.0 Type-A ports. Two of the USB ports support video, photo, and audio playback from a connected USB MSC (mass storage class) device - such as a USB thumbdrive. The other USB port is for charging and service purposes only.

  • Video Files: Compatible video files include AVI, MKV, MOV, MPEG 1/2/4, and WMV.
  • Photo Files: Compatible photo files include JPEG, PNG, and BMP.
  • Audio Files: Compatible audio files include MP3, AAC, FLAC, PCM, and WAV.

Analog & Digital Audio Outputs: The Optoma UHD55 is is outfitted with stereo minijack ( analog audio output and a optical (toslink) digital audio output to connect the projector to an active soundbar, powered speaker, or AV receiver. The optical (toslink) digital audio output supports 2ch PCM and 5.1ch Dolby Digital (not DTS compatible).

Note: The projector does not support HDMI ARC or eARC.

Detachable AC Power Cord: The Optoma UHD55 comes with a detachable 6' IEC 3-prong power cord that will need to be plugged into an AC wall outlet; preferably a surge protected AC outlet.


Optoma Connect App: The Optoma Connect App (for Apple iOS 10.0+ and Android OS 5.0+) allows you to control the UHD55 projector from your compatible smartphone or tablet device. In addition to serving as a remote control, the Optoma Connect app and the UHD55 projector works with IFTTT to setup chain-of-commands for your smarthome devices. The app also provides unique display modes, such as Ambience & Information, that will project on your screen.

  • Remote Control: The Optoma Connect App lets you use your compatible Apple iOS or Android OS device as a wireless remote control for the UHD55.
  • Works with IFTTT: IFTTT (If This Then That) is a free web-based service that allows you to create chains of simple conditional commands, called applets. Applets are used to trigger events such as getting the projector to turn off when you leave the house.
  • Ambience & Information Modes: The Ambience Mode includes images of artworks and natural light installations. The Information Mode provides weather information, work calendar and news.

Note: The projector must be connected to your network router via Ethernet or WiFi.

Optional Voice Assistance: The Optoma Connect App can also be used to setup the UHD55 projector for voice control from an Alexa or Google Assistant enabled device (sold separately - see Accessories Tab). In addition to the Optoma Connect App, you'll also need to install the Alexa App (for Apple iOS 11.0+ and Android OS 6.0+) or the Google Home App (for Apple iOS 12.0+ and Android OS 6.0+) onto your compatible smartphone or tablet device. You can ask Alexa or Google Assistant to change Display Mode, Picture Mode, PureMotion Mode, Brightness Mode, and ECO mode.

  • The Optoma UHD55 projector must be connected to your network router via Ethernet or WiFi.
  • The projector does not features its own built-in mic and requires either an separate Alexa or Google Assistant device (sold separately) for voice control.

Top-Panel: Top-panel controls included Power, Menu, Source, Information, Re-Sync, 4 Directional Select Keys, and Keystone Correction. Also on the top-panel are 3 LEDs that indicate On/Standby, Lamp, and Temperature. The top-panel controls are hidden behind a removal top-cover.

Backlit Remote: The included IR remote provides wireless operation of the Optoma UHD55 DLP projector. The remote is designed with subtle white LEDs to light up the buttons, making it to see and operate, especially in the dark. The IR (infrared) control sensor is located on top of the projector. Make sure to hold the remote control at an angle within 30 degrees perpendicular to the projector's top IR remote control sensor to function correctly. The distance between the remote control and the sensor should be no longer than 22'.

HDMI-CEC: HDMI-CEC (Consumer Electronic Control) enables synchronization of Power On/Off between the UHD55 and connected HDMI-CEC compatible sources.

IP & RS-232C Control: The projector offers remote management control through a RJ45 (LAN) network connection or via RS-232C port. Either connection can be used to control Power, Brightness, Contrast, and other projector settings from your laptop or desktop computer, or a 3rd party remote management system - such as Crestron, Extron, AMX, or PJLink.

12V Trigger Out: The 12V Trigger Out consists a female mono-minijack (3.5mm) which enables control of motorized screens that feature a 12V Trigger Input.

Timers: A Sleep Timer allows you to set the projector to automatically turn off after a predetermined set amount of time. The Security Timer lets you set the number of hours the projector can be used; once this time has elapsed you will be requested to enter your password again.

Auto Power Off: There may be instances when the projector is left running when not in use. To help save energy, the Auto Power Off feature automatically turns off the projector after a set period of time if it is not being used.

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Customer Q&A

1 question already asked

Is this projector (UHD55) compatible with Dolby Visions and Dolby Atmos?
[ Aiden  Jul 21, 2022 ]
1 answer
This Optoma UHD55 4k projector is a beast Aiden, but it won't have Dolby Vision support sadly. The projector also does not support HDMI ARC or eARC, so no Atmos support as a stand alone. You can use this in an Atmos setup, you would just also need a multichannel Home Theater receiver, a 4K UHD player and discs with Atmos content. I hope this helps!
[ Bo  Jul 22, 2022 ]  Staff

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