Optoma
Optoma ZK431ST-B 4K Projector
Optoma ZK431ST-B 4K Projector
In stock
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Johannesburg & Pretoria: 2-3 business days
Cape Town: 2-3 business days
Durban: 3-4 business days
Other major cities: 3-5 business days
Remote & rural areas: 5-7 business days
Timeframes are measured from dispatch, not from order placement. Stocked items are dispatched within 1 business day of payment confirmation. Specialist and indent items are confirmed with a written dispatch date before your order is processed. Free nationwide delivery via insured courier.
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- EFT (Electronic Funds Transfer) — Direct bank transfer from any South African bank account. No additional fees. Orders confirmed within 1 business day of payment reflecting.
- Cross Border Transfer — For customers in SADC neighbouring countries (Lesotho, Zimbabwe, Mozambique, Namibia, Botswana, Eswatini). Invoices settle in ZAR; direct delivery is within South Africa only, and cross-border orders are handled on a collection/freight-forwarder basis.
- Wire Transfer — For international customers outside the SADC region. Proforma invoices are processed in ZAR value; direct delivery is within South Africa only, with collection/freight-forwarder arrangements required for export orders.
Orders are confirmed once payment reflects. Banking details are provided in your order confirmation email. View payment details →
Supplied as an independent parallel import. Warranty is provided directly by VisionSounds — warranty claims are handled by us, not the manufacturer. This is in addition to your rights under the Consumer Protection Act, including the six-month implied warranty of quality.
Returns accepted within 30 days of receipt in the condition supplied, with all original packaging and accessories.
Faulty or incorrect items: free return shipping covered by VisionSounds.
Change of mind returns: customer responsible for return shipping costs.
No restocking fees. Refunds processed within 7 business days of inspection.
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Bring a sharper, brighter 4K image into rooms where space is limited but image quality still matters. The Optoma ZK431ST-B 4K Projector is a compact short-throw laser projector for home cinema rooms, golf simulator bays, boardrooms, training spaces and premium entertainment setups that need a large picture from a shorter installation distance.
Its 4K UHD resolution gives movies, sport, presentations and simulation visuals the extra detail that becomes noticeable on larger screens. With 4,100 lumens of brightness, the ZK431ST-B is also practical in rooms that are not completely dark, making it useful for mixed-use spaces where lighting control is not always perfect.
The laser light source is a major advantage for customers who want lower maintenance and long-term reliability. Instead of planning around regular lamp replacements, the projector is designed for extended use with up to 30,000 hours of light-source life, depending on usage mode and environment.
Why It Stands Out
- True 4K UHD resolution for detailed big-screen viewing
- 4,100 lumens brightness for home cinema, simulator and business spaces
- Short throw ratio of 0.496 for large images from shorter distances
- Laser light source with up to 30,000 hours of life
- High 300,000:1 contrast ratio for stronger perceived depth
- Four-corner correction for easier image alignment
- Supports 16:9, 16:10 and 4:3 screen formats
- Compact chassis for neat installations where space is tight
Ideal For
This projector is a strong fit for customers comparing 4K projectors and screens for a home cinema room, golf simulator, media room, boardroom or premium training space. It is especially useful when you want a large image but cannot place the projector far back from the screen.
Key Specifications
- Resolution: 4K UHD, 3840 x 2160
- Brightness: 4,100 lumens
- Light source: Laser
- Light-source life: Up to 30,000 hours
- Native aspect ratio: 16:9
- Supported aspect ratios: 16:9, 16:10 and 4:3
- Contrast ratio: 300,000:1
- Throw ratio: 0.496
- Approximate dimensions: 10.8 x 4.3 x 8.5 inches
- Approximate weight: 6.3 lb
- SKU: OPTOMA-ZK431ST-B
Buying Notes
For the best result, match the projector with the right screen size, throw distance and room lighting. If you are planning a full setup, compare it with projector screens, AV receivers and amplifiers and home cinema speakers so the image and sound system work together.
Need help checking whether this Optoma projector suits your room, simulator bay or screen size? Contact VisionSounds with your viewing distance, screen width and installation position, and we can help you confirm the practical fit before ordering.
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