
Optoma 4K400STx Projector
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Sapphire Fixed Frame 170x96cm Front Projector Screen 16:9 78 inch SFSC171In stockDiagonal in Inches 78Viewing Width (cm) 170Aspect Ratio 16:09Front or Rear Projection FrontTop Border 80mmSide Border (Per Side) 80mmBottom Border 80mmWeight (kg) 8.90
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Invest in the future of your classroom or office with the Optoma 4K400STx projector.
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.
Short Throw

With a short throw lens, you can project an impressive 100” image from just over a meter away. This allows you to place the projector closer to the wall, reducing shadows so you can present with ease.
True 4K UHD resolution
Ultra HD 4K resolution delivers sharper, life-like images and richer colors - allowing you to sit closer to the screen and enjoy a more immersive experience.
Our DLP projectors provide CTA (Consumer Technology Association) approved True 4K UHD resolution, capable of projecting 8.3 million on screen pixels. That's four times more detail than Full HD and twice as many from competing technology, which only delivers 4.1 million pixels.
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.
*With no direct sunlight or lights directed on screen.
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.
Four corner correction
Adjust the keystone in both the vertical and horizontal plane. You can individually warp each corner of the image to create a perfectly square image. Ideal for uneven walls or where projector placement is awkward and needs to be installed at an angle.
| Item | E9PV7KJ01EZ2 |
|---|---|
| Weight (kg) | 3.980000 |
| EAN | 5055387666931 |
| Technology | DLP |
| HDMI Inputs | 2 |
| Contrast | 1,000,000 |
| Lumens | 4000 |
| Throw Ratio | 0.5 |
| Resolution (Native) | 4K UHD 3840x2160 |
| Light Source | Lamp |
| Light Source Life (Est.) | 10000 |
| More Info. |
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Delivery Rates to mainland UK (excluding large and/or heavy items)
Delivery is to ground floor/kerbside only, if you have special delivery instructions you must contact us to ensure that we can have the best chance of success in delivering the item. We required items to be signed for.
Delivery dates are Monday to Friday unless otherwise specified
Delivery cut off is 3-4pm on most items - earlier time exceptions are large items, high value items, items requiring a pallet (i.e bulk orders) or items which direct ship from the manufacturer or supplier. If you order after cut-off then the order is processed the next day, that means if you ordered Tuesday at 8pm at night, the next day delivery option (if applicable) is Thursday as the order is processed on the Wednesday.
On a large number of items we offer a free delivery service.
Delivery Rates to Highlands, Islands, Northern Ireland & Remote Areas - (excluding screens and Touch Screens)
Non mainland and the Highlands and Islands - this includes anything that goes over water that does not have road access. These rates are determined by couriers based on postcode. If there are multiple items then we may need to quote you for delivery.
This should automatically calculate at the checkout when you enter your address, but sometimes needs to be calculated on a case-by-case basis, please contact us for a quote in this instance.
Screens & Digital Displays
These also have a standard rate ranging upwards from £15 + VAT depending on the size of the product and delivery location, for particularly large/heavy items this is quoted on a case-by-case basis please contact us for a price.
Delivery Rates to Republic of Ireland & rest of EU
We can still ship most items outside of the UK, however, this is quoted on a case-by-case basis so orders cannot be placed through the online checkout without a quoted delivery fee. We can also supply the goods with zero-rated VAT for exports outside the UK. Goods are supplied on DAP Incoterms for exports and we can also accomodate for you to use your own courier to collect the goods from us.
Returns
Faulty Items
Goods Reported Faulty Within 14 Days of Receipt.
If you have a faulty item and are reporting the fault within 14 days of receipt. When the goods are returned to us complete, we’ll issue a full refund to you via your original payment method. We will try and ensure that there is a fault, that often requires is running diagnostics or getting the manufacturer to speak to you directly to determine whether there is a genuine fault rather than just a set up error.
Goods Damaged in Transit
If your goods were damaged in transit it must be reported to us within 3 days. If goods are visibly damaged on receipt the delivery note must be marked accordingly. Once the damaged goods have been collected and received back into our warehouse, we’ll issue a refund via your original payment method. We will require pictures of the damage.
Consumers - If You Have Changed Your Mind – this is for personal use not business or organisations
If you are a private consumer and have changed your mind as long as the goods have not been in your possession for over 14 days, and the item can be sold again as new, then you are entitled to return the goods to us. If the item you are returning is a projector, the lamp hours used must not have exceeded 2 hours otherwise a re-stocking fee will be applied. The cost of returning items is the responsibility of the customer. As new means in original packaging with complete accessory packs and manuals. If any item is marked/damaged, including the packing, there may be a restocking fee. Please contact us directly before sending any goods back to obtain an RMA number without this there may be a delay in dealing with your return. If you purchased for a company, or an organisation you are not deemed a Consumer by law.
About Just Projectors
We’re here to help you choose the right projector or display - we've been doing it since 2001. Call us to talk through your requirements with our trained team. For higher-end models, we may be able to arrange a loan or demonstration.
We supply leading brands such as Epson, Sony, BenQ, ViewSonic, Panasonic and NEC. Because it’s easy to buy the wrong model, we offer real advice — not just an “add to cart” experience. We compare products side-by-side, offer a price promise, and only supply UK stock for stronger warranty support and genuine peace of mind. We avoid low-quality brands with unverified lumen and resolution claims.
We deliver across the UK and Ireland, with a 2–4 day service to Ireland.







