Optoma ZK431ST 4K UHD Short Throw Laser Projector
Taxes included.
Shipping calculated at checkout.
Standard delivery within 2–5 business days
Optoma ZK431ST – 4K UHD Short Throw DuraCore Laser Projector
Eco-friendly compact high brightness 4K UHD short throw laser projector
The ZK431ST is one of Optoma's most compact and hassle-free 4K UHD DuraCore laser projectors to date. Designed for maintenance-free continuous operation, this 4100 ISO lumen projector delivers powerful image performance with flexible installation features and extensive connectivity options in a sleek, compact form factor, up to 34% smaller than previous Optoma models.¹
To support Optoma's commitment to sustainability, the ZK431ST cuts power consumption by up to 45% compared to Optoma's lamp-based projectors.² Energy-saving DuraCore laser technology ensures a long product lifespan of up to 30,000 hours without the need for additional lamps, requires minimal maintenance, and is mercury-free, further lowering its carbon footprint.
Based on the comparison of the 2023 Optoma mainstream laser projectors and its previous generation. ² Comparison of 2023 Optoma mainstream laser projectors and its equivalent lamp-based counterparts. ³ Based on the packaging of 2023 Optoma laser projectors. **Optoma Smart Control App compatible with selected 4K projector models with compatibility for Full HD models pending... for more information please contact your local Optoma service point.. Smart Control app available via RJ45 or optional BT dongle sold separately.*
Designed for the future
We are committed to reducing the overall environmental footprint of our products so we can do right by the planet.
Designing innovative products with sustainability in mind considers every phase of a product's lifecycle, from design, manufacturing, packaging, and logistics, to usage.
True 4K UHD resolution
Ultra HD 4K resolution delivers sharper, life-like images and richer colours - 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.
Lights on viewing
This versatile projector combines high brightness and vivid colours 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.
 |
Lights on viewingThis versatile projector combines high brightness and vivid colours for vibrant, true-to-life visuals in any environment*. Make a lasting impression with bigger and bolder presentations any time of day. |
 |
DuraCore Industry leading lifetime is achieved using Optoma's DuraCore technology. Implementing advanced laser diode cooling techniques and an innovative dust resistant design. |
Specifications
| Display Technology | DLP® |
| Resolution | UHD (3840 x 2160) |
| Brightness | 4,100 lumens |
| Contrast Ratio | 300,000:1 |
| Contrast Ratio (Dynamic) | 2,000,000:1 |
| Native Aspect Ratio | 16:9 |
| Compatible Aspect Ratios | 4:3, 16:9, 16:10, 21:9, 32:9 |
| Keystone Correction (Horizontal) | +/-15° |
| Keystone Correction (Vertical) | +/-15° |
| Displayable Colours | 1,073.4 million |
| Horizontal Scan Rate | 15 ~ 150 kHz |
| Vertical Scan Rate | 24 ~ 240 Hz |
| Uniformity | 75% |
| Screen Size | 0.76 m ~ 7.62 m (30" ~ 300") diagonal |
| Light Source Type | Laser |
| Laser Lifespan | 30,000 hours |
| Throw Ratio | 0.496:1 |
| Projection Distance | 0.33 m – 3.3 m |
| Zoom Type | Fixed |
| Focal Length | 7.51 mm |
| Native Offset | 114% |
| Inputs | 1 x HDMI 2.0, 1 x HDMI 2.0 (eARC) |
| Outputs | 1 x Audio 3.5 mm, 2 x USB-A power 1.5A |
| Control Ports | 1 x RS232, 1 x RJ45, 1 x 12V trigger, 1 x 3D sync |
| Noise Level (Min) | 29 dB |
| Noise Level (Max) | 35 dB |
| PC Compatibility | UHD, FHD, UXGA, SXGA, WXGA, HD, XGA, SVGA, VGA, Mac |
| 2D Compatibility | NTSC M/J, 3.58 MHz, 4.43 MHz PAL B/D/G/H/I/M/N, 4.43 MHz SECAM B/D/G/K/K1/L, 4.25/4.4 MHz 480i/p, 576i/p, 720p (50/60 Hz), 1080i (50/60 Hz), 1080p (50/60 Hz) |
| 3D Compatibility | Yes (DLP 3D; PC frame sequential 120 Hz 3D, Blu-ray DVD 3D) |
| 3D | Full 3D |
| Security | Security bar, Kensington Lock, Password protected interface |
| IP Rating | IP6X |
| OSD Languages | 25 languages: Arabic, Czech, Danish, Dutch, English, Farsi, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Norwegian, Polish, Portuguese, Romanian, Russian, Chinese (Simplified), Spanish, Swedish, Chinese (Traditional), Turkish, Vietnamese |
| 24/7 Operation | Yes |
| 360° Operation | Yes |
| Operating Conditions | 0°C ~ 40°C, Max. Humidity 80%, Max. Altitude 2,500 ft |
| Speaker Count | 1 |
| Watts per Speaker | 15 W |
| Power Supply | External power supply, 100V ~ 240V, 50–60 Hz |
| Power Consumption (Standby) | <0.5 W |
| Power Consumption (Min) | 124 W |
| Power Consumption (Max) | 178 W |
| Dimensions (W × D × H) | 274 × 216 × 114 mm |
| Gross Weight | 4.3 kg |
| Net Weight | 2.9 kg |
| In the Box | AC power cord, Remote control, 2x AAA batteries, Basic user manual |
Caring for your Speakers and Amplifiers
To Keep your equipment safe these are some best practices to note. Please be advised that this is only to reduce the risk of misuse and is not an exhaustive list.
Speakers
- Speaker terminals are marked red and black, ensure your amplifier to the speakers are wired on the same colours
- Ensure no loose speaker wire from the red touches a loose wire from the black as this will lead to a short circuit and damage either the speaker, the amplifier or both.
- Not all speakers are designed to play at max volume, kindly consider the pairing of your amplifier and speakers
- Speaker cabinets cannot be replaced please handle with care.
AV & Stereo Amplifiers
- If your amplifier has HDMI ports, ensure all devices are off before plugging in the HDMI cable
- Turn off the amplifier before swoping out or adding speaker cable
- Amplifiers generate heat, place them in a well ventilated space. if possible avoid having anything on top of the unit.
- adding a surge protector can assist with power dips which are likely to damage your devices. Isotek and Furman are industry standard.
- Dusty environments can sometimes lead to accumulation of dust in the electronic components that might affect heat regulation
Shipping & Returns
- Free shipping on orders over R500 within the country.
- Standard delivery within 2–5 business days. Delays will be communicated. This might vary slightly depending on your location.
- Return items in original condition for a full refund. (unopened state)
- Returns that are open/unboxed will be subject to a handling fee. Refunds will only be processed after testing the unit.