Optoma ZK431ST-B - 4K UHD Golf Simulator Projector | 4100 Lumens

True 4K Clarity. Ultra-Short Throw. Built for Space-Constrained Sim Rooms.

The Optoma ZK431ST-B brings native 4K UHD resolution to golf simulators with a 0.496:1 ultra-short throw ratio — the tightest throw in Optoma's 4K lineup. Project a massive 100" image from just 1.3 feet away, making it ideal for tight garages, basements, and purpose-built bays where mounting distance is limited.

At 4,100 lumens of DuraCore laser brightness, the ZK431ST-B delivers vivid, lights-on performance without washing out. The dedicated Golf Sim picture mode is tuned specifically for simulator software like GSPro, rendering sharp fairways, readable overlays, and detailed course textures exactly as designed.

Powered by Optoma's DuraCore laser technology with a 30,000-hour lifespan, the ZK431ST-B requires zero lamp replacements and maintains consistent brightness for years of maintenance-free operation. For golfers who want true 4K image quality in a compact, easy-to-install package.

Key Benefits

✔ Native 4K UHD Resolution (3840 × 2160)
8.3 million on-screen pixels deliver sharper fairways, clearer greens, and more legible simulator data than 1080p projectors.

✔ Tightest Throw in 4K Class (0.496:1)
Project a 100" image from just 1.3 feet away. Perfect for space-constrained sim rooms where typical short-throw projectors won't fit.

✔ 4,100 Lumens Laser Brightness
Bright enough for lights-on play in home golf simulators or commercial entertainment spaces. No washout in controlled ambient light.

✔ Golf Sim Mode with GSPro Tuning
The Optoma Smart Control app includes display tuning specifically optimized for GSPro and other third-party simulation software.

✔ 30,000-Hour DuraCore Laser
Zero lamp replacements. Instant on/off. Consistent brightness and color performance across the entire lifespan.

✔ Smart Setup from Your Phone
The Optoma Smart Control app (iOS/Android) guides screen alignment, adjusts geometry with Smart Fit, and provides full projector control.

✔ Four-Corner Correction & 360° Projection
Dial in a perfect fit on any screen from 36" to 300". Install in any orientation — ceiling, floor, or portrait.

✔ Compact, Golf-Sim-Specific Design
The "-B" model is Optoma's golf simulator variant with integrated Golf Sim mode and optimized color profiles.

Who Is This For?

✅ Golfers who want 4K resolution without paying flagship prices
✅ Space-constrained installations where projector distance is extremely limited
✅ Dedicated simulator rooms with controlled lighting
✅ GSPro users who want optimized display tuning
✅ DIY installers looking for easy phone-based setup and alignment
✅ Upgraders from 1080p who notice the resolution difference on larger screens

Technical Specifications

Display

• Technology: Single-chip DLP
• Native Resolution: 4K UHD (3840 × 2160)
• Pixel Count: 8.3 million (True 4K, CTA approved)
• HDR Support: HDR10, HLG (Hybrid Log Gamma)
• Aspect Ratio: 16:9

Brightness & Light Source

• Brightness: 4,100 lumens (ISO 21118)
• Light Source: DuraCore Laser
• Light Source Life: Up to 30,000 hours

Lens & Throw

• Throw Ratio: 0.496:1 (fixed, ultra-short throw)
• Screen Size Range: 36" – 300" diagonal
• 100" Screen Distance: Approximately 1.3 feet
• Keystone Correction: ±15° vertical / horizontal
• Four-Corner Correction: Yes
• Projection Orientation: 360° (floor, ceiling, portrait)

Connectivity & Control

• HDMI: Yes (multiple inputs)
• Control: RS232, RJ45 LAN
• Built-in Speaker: Yes
• Control Systems: AMX, Crestron RoomView, Extron compatible
• OTA Updates: Yes (over-the-air firmware updates)

Software & Apps

• Optoma Smart Control App: iOS and Android
• Smart Fit: Camera-based auto screen alignment
• Smart Move: Obstacle detection and image repositioning
• Optoma Management Suite (OMS): Cloud-based or LAN device management
• Picture Modes: Golf Sim, Cinema, Presentation, and more
• 3D Support: Yes

Installation & Mounting

The ZK431ST-B's ultra-short throw design enables installation in extremely tight spaces:

• Throw Distance: 100" screen from ~1.3 feet. This is significantly closer than typical short-throw projectors.
• Ceiling Mount: Compact form factor (up to 34% smaller than previous Optoma 4K models) simplifies installation.
• Alignment: Smart Fit feature uses your smartphone camera to detect the screen frame and automatically correct image alignment.
• Smart Move: Automatically detects obstacles and repositions the projection to a clear, unobstructed area.
• Orientation: 360° projection allows any mounting angle.

The "-B" Designation: The ZK431ST-B is Optoma's golf simulator variant of the ZK431ST. It includes integrated Golf Sim picture mode and is marketed specifically for simulation applications.

Golf Simulator Compatibility

The ZK431ST-B works with all major golf simulation software and launch monitors:

Software: GSPro (with dedicated Smart Control tuning), E6 Connect, TGC 2019, Awesome Golf, Creative Golf, and more
Launch Monitors: SkyTrak, Garmin R10/R50, Mevo+, FlightScope, Rapsodo, Foresight, GolfJoy, Uneekor, and any monitor with HDMI output

The Optoma Smart Control app provides purpose-built display tuning for third-party golf simulation software, delivering more realistic, visually accurate, and immersive experiences.

ZK431ST-B vs. Other Optoma Golf Sim Projectors

Choose the ZK431ST-B if you want true 4K resolution with the tightest throw ratio — ideal for extremely space-constrained installations.

Choose the GT2400HDR if budget is the priority and 1080p resolution meets your needs.

Choose the ZK521ST-B if you need both 4K resolution AND maximum brightness (5,000 lumens) for brighter rooms or commercial applications.

When 4K Matters

Native 4K UHD delivers four times the pixel count of 1080p (8.3 million vs. 2.1 million pixels). The difference is most noticeable on:

• Larger screens: 120"+ screens benefit significantly from 4K's added detail
• Closer viewing distances: If you're standing 8-10 feet from the screen, 4K sharpness is visible
• Simulator overlays: Club data, shot metrics, and course maps render with cleaner text and sharper graphics
• Detailed course textures: Fairways, greens, and backgrounds show more realistic detail

For typical home simulators with 100-120" screens viewed from 10-12 feet, 4K delivers a noticeably sharper image than 1080p — especially in the simulator UI and shot data overlays.

What's Included

• Optoma ZK431ST-B Projector
• AC Power Cord
• Remote Control
• Batteries
• Quick Start Guide

Warranty

Projector: 3-year limited warranty
Light Source: Covered under DuraCore laser technology (30,000 hours rated life)

Frequently Asked Questions

How close can I really mount this projector?
The 0.496:1 throw ratio projects a 100" image from approximately 1.3 feet. This is significantly closer than typical short-throw projectors (which are usually 0.6-0.8:1). Use Optoma's distance calculator for exact placement.

Is 4,100 lumens bright enough?
Yes, for most home simulators with controlled lighting. If your space has significant ambient light, windows, or you're going commercial-grade, the ZK521ST-B at 5,000 lumens provides additional headroom.

What's the difference between the ZK431ST and ZK431ST-B?
The "-B" model is Optoma's golf simulator variant with integrated Golf Sim picture mode and optimized color profiles for simulation software. Both share the same core specifications.

Does the GSPro tuning actually make a difference?
Yes. The Optoma Smart Control app's GSPro-specific tuning optimizes color grading for simulator graphics, making greens, fairways, and sky tones render more realistically than default settings.

Does it work with other simulator software besides GSPro?
Absolutely. The Golf Sim picture mode works with any simulator — E6, TGC 2019, Awesome Golf, and others. The GSPro tuning is an additional optimization, not a requirement.

Can I use Smart Fit to align the projector?
Yes. The Optoma Smart Control app uses your phone's camera to detect the screen frame and automatically correct image alignment. This significantly reduces installation effort.

Is this projector overkill for a smaller screen?
For screens under 100", you may not notice the full benefit of 4K resolution. The GT2400HDR at 1080p would save money without sacrificing visible image quality on smaller screens.

How does it handle dust in a garage environment?
Optoma's DuraCore laser technology includes dust-resistant design. While not IP6X rated like some models, the 30,000-hour laser lifespan accounts for normal residential use including garage installations.