Optoma 4K400STx

Brand	Optoma
Type	Education
Released	October 2022
Resolution	4K UHD
HDR formats	HDR10, HLG
Imaging technology	DLP
Light source	Lamp
Claimed brightness (non-standard)	4,000 lm
Throw ratio	0.5:1
Input lag	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4 ms · 4K UHD: 60 Hz 16.7 ms

A single-chip DLP lamp projector with a fixed 0.5:1 short-throw lens and a 3840x2160 addressable image, rated 4,000 lumens. It has two HDMI 2.0 inputs, a 10 W speaker and a 1080p 240Hz game mode, and Optoma markets it for classrooms and meeting spaces as the short-throw version of the 4K400x.

Data sheet

Picture

Claimed brightness (non-standard)	4,000 lm
Brightness uniformity	80%
Imaging technology	DLP
Chip / panel diagonal	0.65 in
Native aspect	16:9Derived
Pixel shift	XPR 4-way
Addressable resolution	4K UHD (3840 × 2160)
Dynamic contrast	1,000,000:1
Dynamic contrast method	Light-source dimming
Gamma / EOTF presets	2.2, 2.4
Colour temperature presets	D93, D65, D55, Native
HDR formats	HDR10, HLG
Tone mapping	Adjustable
Colour management (CMS)	6-axis
3D	Yes
3D formats	Frame packing

Light source

Light source	Lamp
Lamp power	240 W
Light-source life	4,000 h max · 10,000 h eco · 15,000 h dynamic
Cool-down time	90 s

Optics

Throw ratio	0.5:1100″ · 1.11 m
Image size	36.43–301 in
Projection offset	116%
Zoom	None
Focal length	7.51 mm
Aperture (f-number)	2.8
Focus	Manual
Vertical keystone	40°
Horizontal keystone	40°
Corner correction	4-corner
Grid warp	Yes

Motion & gaming

Max input refresh	1080p: 240 Hz
Input lag	1080p: 60 Hz 17 ms · 120 Hz 8.6 ms · 240 Hz 4 ms · 4K UHD: 60 Hz 16.7 ms Enhanced Gaming on	Enhanced Gaming on

Inputs & control

HDMI inputs	2 × HDMI 2.0
Max input resolution	DCI 4K
Control ports	RS-232, 12 V trigger

Audio

Speaker power	10 W
Speakers	1
Audio outputs	3.5 mm
HDMI audio return	NoneDerived

Physical & installation

Dimensions (W × D × H)	315 × 270 × 115 mm
Weight	3,978 g
Orientations	Table, Ceiling, Rear

Environment & power

Operating temperature	5–40°C
Operating humidity	10–80%RH
Altitude	3,000 m
Power draw	Max 320 W · Eco 220 W
Standby	0.5 W
Mains input	100–240 V · 50/60 Hz
Fan noise	Max 28 dB(A) · Normal 24 dB(A)

Safety & support

Risk group	RG2
Marks	FCC
Warranty	🇺🇸 US 2 yr Third-party listing; Optoma's warranty page was not read
User manual	region-resource.optoma.com

In the box

In the box	Power cord, Remote, Remote batteries, User manual
Remote	Backlit

Similar models

Model	Resolution	Tech	Lumens	Price
ViewSonic LS610WH WXGA · DLP	WXGA	DLP	4,000	$749 −$2,750	Compare
Optoma 4K400x 4K UHD · DLP	4K UHD	DLP	4,000*	$1,399 −$2,100	Compare
Epson PowerLite 119W WXGA · 3LCD	WXGA	3LCD	4,000	$671 −$2,828	Compare
Epson PowerLite L210SW WXGA · 3LCD	WXGA	3LCD	4,000	$1,416 −$2,083	Compare
Epson PowerLite L210SF 1080p · 3LCD	1080p	3LCD	4,000	$1,516 −$1,983	Compare
ViewSonic PS502W WXGA · DLP	WXGA	DLP	4,000	$579 −$2,920	Compare

Other

Tools

Throw calculator — How far from the screen the 4K400STx needs to sit for a given image size, set to its 0.5:1 lens.
Download spec as CSV — Every value on this data sheet with its unit and source, one row per spec.
Download spec as JSON — The same data from the open data API, with variants and identifiers.

Variants & identifiers

Use these to confirm a listing is this exact model. Any of them works at /p/{code}.

Variant	Region	Type	Code
Standard, US	🇺🇸 US	UPC	796435446529