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Optoma 4K400STx 4K UHD Short Throw Projector

Part #: OPT4K400STX  |   Mfg #: 4K400STx
Optoma 4K400STx 4K UHD Short Throw Projector Optoma 4K400STx 4K UHD Short Throw Projector Optoma mpn:4K400STx
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Home theater projector

4K400STx 4K UHD Short Throw Projector

  • True 4K UHD resolution
  • HDR and HLG compatible
  • Bright lamp based 4000 Lumens
  • 0.50 Short Throw Ratio
  • Created for a competitive gaming advantage - Supports 1080p 240Hz at 4.2ms and 4K 60Hz at 16.9ms

Discover the short throw version of the 4K400x, for when you want a big screen in a smaller space.

Future proof your classroom or meeting room with this high brightness True 4K UHD short throw projector. The 4K400STx delivers rich visuals in any environment even when total ambient light control is not possible.

This projector boasts two HDMI ports, audio connections, USB to power 5V devices, 12V trigger and an RS232 to integrate into your existing control solution.

In addition, enjoy 1080p in 240Hz with 4.2ms input lag when connected to a PC.

HDR and HLG compatible

Capable of receiving and displaying both HDR10 and Hybrid Log Gamma (HLG) HDR content. This Optoma projector allows you to see far more detail and texture. Objects look more solid and lifelike and the extra detail creates a greater sense of depth.

Lights on viewing

This versatile projector combines high brightness and vivid colors for vibrant, true-to-life visuals in any environment*. Make a lasting impression with bigger and bolder presentations any time of day.

Dual HDMI inputs

Play games, stream videos and share photos on the big screen in the comfort of your own home. With dual HDMI inputs, you can easily connect to your games console, set-top box, laptop, PC, Blu-ray player or media streamer with a single cable. You can even turn it into a smart projector by connecting an HDMI dongle like the Google Chromecast™, Amazon Fire TV, Apple TV™ or Roku® stick.

Integrated speaker

Complete your home entertainment experience with the convenience of a powerful built-in speaker for exceptional sound quality and an easy set up without the need for costly external speakers.


Use the USB-A port to power an HDMI dongle, such as Google Chromecast.

Backlit remote

Our backlit remotes are designed using subtle white LEDs to light up the buttons, making it to see and operate, especially in the dark

Click on a spec (like Resolution:) to learn more about it. Click here for the complete glossary.
Image Quality Projector Calculator See Optoma 4K400STx 4K UHD Short Throw Image Size Calculator »
Resolution 4K UHD (3840 x 2160)
Brightness 4000 lumens
Contrast Ratio 1000000:1
Uniformity 80%
No. of Colors Full Color
Aspect Ratio(s) Native - 16:9
Other(s) - 4:3
Display Type DLP (1 chip);
Video Signals 480i/p, 576i/p, 720p(50/60Hz), 1080i(50/60Hz), 1080p(50/60Hz), 2160p(50/60Hz)
H Sync 31 ~ 135Khz
V Sync 24 ~ 120Hz
3D Ready Yes
Dot Clock --
Inputs / Outputs
  • HDMI (High-Definition Multimedia Interface for digital video and digital audio)
  • HDMI 2.0 (High-Definition Multimedia Interface, version 2.0 with increased bandwidth)
  • Screen Trigger (12V) (DC power outlet)
  • USB
  • RS-232 (Serial)
Call the projector experts at 1-888-248-0675 for more information
Inputs Description Inputs 2 x HDMI 2.0 Outputs 1 x Audio 3.5mm, 1 x S/PDIF, 1 x USB-A power 1.5A Control 1 x RS232, 1 x 12V trigger
Built-in Audio 10 Watt Speaker
Projection Lens Projector Calculator See Optoma 4K400STx 4K UHD Short Throw Image Size Calculator »
Lens --
Throw Ratio 0.5:1
Keystone Corr. Horizontal and Vertical
Specs: Horizontal and Vertical: +/-40 degrees
Lens Shift --
Proj. Methods --
Dimensions 12.4" x 4.65" x 10.63" (W x H x D)
Unit Weight 8.77 lbs.
Power Supply 100 ~ 240V, 50 ~ 60Hz
Power Consumption 220
Ecomode No
FCC Class A
Audible Noise 24.0 dB
Lamp --
Lamp Life 4000 hours
Replacement Lamp
OPTBLFU240E, $261.00     
Included Accessories
Items Included 4K400STx Projector, AC power cord, Remote control, 2x AAA batteries, Basic user manual
Remote Control Yes
Carry Case No
Projector 2 year parts and labor limited warranty on the projector; 90 days lamp warranty
Lamp --

* -- indicates specification not published by manufacturer.