Optoma 4K400STx 4K Short Throw Projector
By Optoma
Native 4K Resolution At A Sim-Friendly Price.
The 4K400STx puts real 3840 × 2160 pixels on screen — not pixel-shifted, not upscaled — at a fixed 0.5:1 short throw that mounts close behind the hitting area. It is a straightforward, no-lens-shift, no-zoom projector built around one job: fill a sim screen with a sharp, bright 4K image and stay out of the swing path.
Native 4K Without The Premium Price Tag.
True 4K UHD Panel
3840 × 2160 native resolution puts 8.3 million real pixels on screen — sharp course textures, crisp ball-flight overlays, and clean simulator UI at full impact-screen size.
Fixed 0.5:1 Short Throw
A tight 0.5:1 throw ratio projects a 100″ image from roughly four feet away, keeping the projector mounted behind the player and clear of the swing arc.
4,000 ANSI Lumens
Bright enough to hold up in garages and bonus rooms with some ambient light, so the bay does not need to be a blacked-out theater to see the green clearly.
Wide ±40° Keystone Range
Horizontal and vertical keystone correction up to ±40° gives more room to square the image in bays with imperfect ceiling geometry or off-axis mounts.
Low-Latency PC Gaming Mode
4.2 ms input lag at 1080p/240Hz keeps ball-flight rendering tight when the sim PC is pushed for frame rate over resolution.
Simple, Durable Connectivity
Dual HDMI 2.0, USB-A power, RS232, and a 12V trigger cover PC-based sims and integration into an existing AV control setup without extra adapters.
Who Is It Best For?
Budget-conscious 4K builds where a fixed, no-fuss short-throw lens is acceptable and the priority is native UHD resolution at the lowest possible entry price into true 4K.
A Fixed Lens That Keeps Install Simple.
Fixed-Lens Geometry
The 4K400STx uses a single 0.5:1 throw ratio with no zoom and no lens shift, which means lens-to-screen distance is a known quantity rather than a range to dial in.
- 0.5:1 fixed short-throw ratio
- Screen size range of 36.43″–300.53″ diagonal
- Native 16:9 aspect ratio, 4:3 compatible
- 116% native lens offset for above-centerline ceiling mounting
Manual Focus, Wide Keystone
Without motorized zoom or auto-fit tools, alignment relies on manual focus plus a generous keystone range to true up the image after mounting.
- Manual focus, fixed focal length (7.51 mm)
- ±40° horizontal and vertical keystone correction
- No lens shift — plan the mount position around the fixed offset
- Use the ESG fitment tool to confirm exact mounting distance for the screen size in the bay
A Straightforward Path Into Native 4K.
The 4K400STx is a DLP short-throw projector built around a 240-watt lamp-based light source rated for up to 4,000 hours in Bright mode, 10,000 hours in Eco mode, and 15,000 hours in Dynamic mode — a different maintenance profile than laser-based models in the lineup, and one worth factoring into total cost of ownership over several years of daily sim use.
With a fixed 0.5:1 throw ratio and a published projection distance of 15.75″ to 129.92″, the 4K400STx mounts close behind the hitting area on most residential ceiling heights. Because there is no zoom or lens shift, exact placement matters more than on motorized-lens projectors — run the screen size and room dimensions through the ESG projector fitment tool and throw calculator before finalizing the mount location.
Ceiling mount notes: the 116% native lens offset projects the image above the lens centerline, which suits a behind-player ceiling mount without needing lens shift to correct vertical position. Wide ±40° keystone correction gives extra flexibility if the mount angle is not perfectly perpendicular to the screen.
For PC-based simulators running GSPro, E6 Connect, TGC 2019, or Awesome Golf, the 4K400STx connects over either of its two HDMI 2.0 inputs and supports native 4K signal input as well as 1080p at 240Hz with 4.2 ms input lag for sim PCs prioritizing frame rate.
The Full 4K400STx Feature Set.
True 4K UHD Resolution
Native 3840 × 2160 resolution with no pixel-shifting delivers 8.3 million on-screen pixels for sharp course textures and ball-flight tracers.
Fixed Short-Throw Projection
0.5:1 throw ratio fills a 100″ image from roughly four feet, ideal for tight enclosures where mount depth is limited.
4,000 ANSI Lumens
High enough output for garages and bonus rooms with some daylight or ambient lighting present during play.
1,000,000:1 Contrast Ratio
Strong dynamic contrast helps separate shadow detail on course terrain from bright sky and fairway highlights.
HDR10 & HLG Support
Expanded highlight and shadow detail on HDR-capable content and simulator software that supports it.
Full Connectivity Suite
2× HDMI 2.0, USB-A power (1.5A), S/PDIF audio, 3.5mm audio out, RS232, and a 12V trigger for integration with mounts, screens, or automation.
4K400STx Key Specifications.
| Resolution | True 4K UHD (3840 × 2160 native) |
|---|---|
| Brightness | 4,000 ANSI lumens |
| Contrast Ratio | 1,000,000:1 |
| Light Source | 240W lamp — 4,000 hrs (Bright) / 15,000 hrs (Dynamic) / 10,000 hrs (Eco) |
| Throw Ratio | 0.5:1 (fixed) |
| Zoom / Lens Shift | Fixed, manual focus — no zoom, no lens shift |
| Projection Distance | 15.75″–129.92″ |
| Screen Size Range | 36.43″–300.53″ diagonal |
| Keystone | ±40° horizontal, ±40° vertical |
| Native Aspect Ratio | 16:9 (4:3 compatible) |
| HDR Support | HDR10, HLG |
| Input Lag | 4.2 ms (1080p at 240Hz) |
| Inputs | 2× HDMI 2.0, USB-A power (1.5A), S/PDIF, 3.5mm audio out, RS232, 12V trigger |
| 3D Support | Full HD 3D |
| Noise Level | 24 dB (Eco) / 28 dB (max) |
| Power Consumption | 220W (typical) / 320W (max) / 0.5W standby |
| Dimensions (W × D × H) | 12.4″ × 10.63″ × 4.65″ |
| Weight | 8.77 lbs (net) |
| Dealer Status | Elite Sim Golf Authorized Optoma Dealer |
Optoma Golf Simulator Projectors.
The 4K400STx sits at the entry point of native 4K. These related Optoma models cover the step up to laser light sources and the step down to a lower-cost 1080p build.
- Resolution: 1080p Full HD (1920×1080)
- Brightness: 3,500 ANSI lumens
- Light Source: DuraCore laser (30,000 hrs)
- Throw Ratio: 0.496:1 (fixed)
- Contrast: 300,000:1 (2,000,000:1 dynamic)
- Input Lag: 8.6 ms
- HDR: HDR10, HLG
- Connectivity: 2× HDMI 2.0, USB-A, RS232
- Resolution: True 4K UHD (3840×2160)
- Brightness: 4,000 ANSI lumens
- Light Source: 240W lamp (4,000–15,000 hrs by mode)
- Throw Ratio: 0.5:1 (fixed)
- Contrast: 1,000,000:1
- Input Lag: 4.2 ms (1080p/240Hz)
- HDR: HDR10, HLG
- Connectivity: 2× HDMI 2.0, RS232, 12V trigger
- Resolution: 4K UHD (3840×2160)
- Brightness: 3,500 ANSI lumens
- Light Source: DuraCore laser (30,000 hrs)
- Throw Ratio: 0.496:1 (fixed)
- Contrast: 500,000:1
- Input Lag: 4.4 ms (1080p/240Hz)
- HDR: HDR10, HLG
- Connectivity: 2× HDMI 2.0, RS232, RJ45
Real 4K Resolution Without The Laser Premium.
Choose the Optoma 4K400STx for a fixed short-throw projector that puts true native 4K UHD resolution on screen, mounts close behind the hitting area, and holds up in garages and bonus rooms with some ambient light, all at the lowest cost of entry into the 4K resolution tier.
Pair It With An Elite Sim Golf Enclosure
The 4K400STx pairs well with a properly sized Eagle 12 enclosure and a 4K-ready impact screen sized to its fixed 0.5:1 throw geometry, giving a clean, screen-filling bay without a laser-tier price tag.
Build A Complete SimKit
Configure a turnkey enclosure, screen, and 4K400STx simulator package, or build a custom bay from the ground up using the SimKit Bundle Builder.