Does it need a special screen?

No. A plain white or light gray wall works, though a short-throw-friendly screen reduces hot spots and improves contrast.

How far from the wall should it sit?

With a 0.5:1 throw ratio, roughly half the screen width. A 100-inch-wide image needs about 50 inches of distance.

Is it good for gaming?

Yes for console and PC gaming: it accepts 1080p at 120Hz and 4K at 60Hz, with low enough input lag for most players.

Does it have smart apps built in?

No. There is no streaming platform onboard, so plan on a streaming stick, console or set-top box over HDMI.

How long does the lamp last?

About 4,000 hours in normal mode, less in bright mode. That is well short of laser projectors rated for 20,000 hours or more.

Can I mount it on the ceiling?

Yes. It weighs about 8.8 lb and has ceiling-mount holes, but there is no lens shift, so aim it carefully before tightening.

What do buyers say about the Optoma 4K400STx 4K UHD Short Throw Projector?

Rated 4.5 out of 5 from 30 ratings.

Where can I buy the Optoma 4K400STx 4K UHD Short Throw Projector?

14 stores we checked sell it, including Walmart, Newegg, Connection, colamco.com, Adorama.

Optoma 4K400STx 4K UHD Short Throw Projector

Best price now

$1,958.95at ConnectionChecked 5 h ago

Compared across 14 stores. Prices are checked against each store and labelled with when.

Visit Connection

Optoma 4K400STx 4K UHD Short Throw Projector

Best price now

$1,958.95at ConnectionChecked 5 h ago

Compared across 14 stores. Prices are checked against each store and labelled with when.

Visit Connection

Ask our agent about this product

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Price facts

Lowest price today: $1,958.95 at Connection (checked Nov 10, 2026).
Checked at 14 stores.

Our take on the Optoma 4K400STx 4K UHD Short Throw Projector

The Optoma 4K400STx is a 4K UHD DLP projector built for short-throw setups: a 0.5:1 throw ratio puts a very large image on the wall from close range, so it works in smaller rooms and above a media console. It pairs a 4,000-lumen lamp with HDR-ready 4K input, four-corner keystone correction and a built-in speaker, which keeps setup simple. Against long-throw 4K projectors it trades placement flexibility for closeness, and against LED and laser rivals it gives up long light-source life and needs more manual adjustment. It suits movie and sports rooms, gaming at high refresh rates and bright living rooms where a TV would be too small.

Best forSmall rooms and apartments where the projector sits close to the wallBig-screen movie and sports viewing in a living roomGaming at 1080p/120Hz or 4K/60HzCeiling or shelf mounting above a media console

Pros

Short 0.5:1 throw fills a large screen from a few feet away
Native 4K UHD resolution with HDR input
4,000 lumens holds up in rooms with some ambient light
Four-corner keystone plus horizontal and vertical correction eases off-axis placement
Two HDMI inputs and a built-in speaker for a simple setup
120Hz refresh at 1080p suits fast games

Cons

Lamp light source rated around 4,000 hours in normal mode, short next to laser rivals
No optical zoom and manual focus limit fine sizing
No lens shift, so placement depends on keystone correction
No wireless connectivity; Bluetooth is listed but streaming needs a stick or box
Built-in speaker is basic for anything beyond casual use

Optoma 4K400STx 4K UHD Short Throw Projector prices at every store

ConnectionNew
In stock
$1,958.95Checked 5 h ago
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colamco.comNew
In stock
$2,076.99Checked 5 h ago
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WalmartNew
In stockSold by Adorama Camera
$2,289.00Checked 5 h ago
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NeweggNew
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$2,289.00Free shippingChecked 5 h ago
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AdoramaNew
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$2,289.00Checked 5 h ago
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Best BuyNew
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$2,289.00Checked 5 h ago
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protechprojection.comNew
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$2,289.00Checked 5 h ago
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B&H Photo-Video-AudioNew
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$2,289.00Checked 5 h ago
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ProjectorScreen.comNew
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$2,289.00Checked 5 h ago
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audiogeneral.comNew
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$2,289.00Checked 5 h ago
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$2,289.00Checked 5 h ago
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$2,289.00Checked 5 h ago
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$2,708.99Checked 5 h ago
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Optoma 4K400STx 4K UHD Short Throw Projector price history

Lowest price we've seen: $1,958.95 on Nov 10 at Connection. Tracked across 14 stores since Nov 10.

What reviewers say

4.5 / 530 ratings

Owners rate it highly for the short-throw 4K picture and bright output in a modest room. Complaints center on lamp life, fan noise and the limits of manual focus and keystone.

What people mention

Picture sharpnessPraisedOwners say the 4K image is crisp and detailed, especially with native 4K sources.
BrightnessPraisedReviewers find it bright enough for rooms with some daylight.
Short throwPraisedBuyers like getting a huge picture from a few feet away in small rooms.
Fan noiseCriticisedSome owners notice fan noise during quiet dialogue scenes.
Lamp lifeCriticisedReviewers flag the roughly 4,000-hour lamp rating and replacement cost against laser projectors.
SetupMixedFour-corner correction helps, but manual focus and no lens shift mean careful placement.

About the Optoma 4K400STx 4K UHD Short Throw Projector

The item in this listing is a brand new sealed product in its original manufacture retail packaging. This product will come with a Minimum 1 year warranty. Optoma Technology 4K400STx 4000-Lumen 4K UHD Short-Throw DLP Projector

Specifications

Native Resolution: 4K UHD
Aspect Ratio: 16:9
Projected Image Size: 25.04 ft (maximum diagonal image size)
Display Type: DLP
Refresh Rate: 24 Hz - 120 Hz (vertical scan range)
Contrast Ratio: 1,000,000:1
Color Reproduction: sRGB and CMS Color Support

Questions and answers

Does it need a special screen?: No. A plain white or light gray wall works, though a short-throw-friendly screen reduces hot spots and improves contrast.
How far from the wall should it sit?: With a 0.5:1 throw ratio, roughly half the screen width. A 100-inch-wide image needs about 50 inches of distance.
Is it good for gaming?: Yes for console and PC gaming: it accepts 1080p at 120Hz and 4K at 60Hz, with low enough input lag for most players.
Does it have smart apps built in?: No. There is no streaming platform onboard, so plan on a streaming stick, console or set-top box over HDMI.
How long does the lamp last?: About 4,000 hours in normal mode, less in bright mode. That is well short of laser projectors rated for 20,000 hours or more.
Can I mount it on the ceiling?: Yes. It weighs about 8.8 lb and has ceiling-mount holes, but there is no lens shift, so aim it carefully before tightening.
Where is the Optoma 4K400STx 4K UHD Short Throw Projector cheapest?: At Connection, for $1,958.95, as of our latest check.
What do buyers say about the Optoma 4K400STx 4K UHD Short Throw Projector?: Rated 4.5 out of 5 from 30 ratings.
Where can I buy the Optoma 4K400STx 4K UHD Short Throw Projector?: 14 stores we checked sell it, including Walmart, Newegg, Connection, colamco.com, Adorama.