The LK830ST is a compelling upgrade from the AH500ST when you want 4K and already have or plan to buy a suitable video source. Their nearly identical throw ratios make the comparison especially relevant for close-mount golf bays. They do not make the projectors physically interchangeable.
At our checked prices, the AH500ST costs $1,999 and the LK830ST costs $2,499. The projector-only difference is $500. This article asks whether the rest of the installation can make that $500 useful.
The close-throw comparison
| Specification | AH500ST | LK830ST |
|---|---|---|
| Display resolution | 1920 × 1080 | 4K UHD |
| Rated brightness | 4,000 ANSI lumens | 4,000 ANSI lumens |
| Light source | Laser | Laser |
| Throw ratio | Fixed 0.499 | Fixed 0.496 |
| Published projection offset | 112% | 114% |
| Current projector price | $1,999 | $2,499 |
This is a specification comparison, not a claim that we measured equal brightness or image quality. The matching lumen ratings remove the simplest “pay more for more lumens” argument. The main advertised upgrade is resolution, with different installation details to check.
The 0.36-inch result and what it does not prove
For a 10-foot-wide native 16:9 image, the nominal lens distances are 4.99 feet for the AH500ST and 4.96 feet for the LK830ST. The difference is 0.03 feet, or 0.36 inches.
That is a useful calculation because it shows why these models belong on the same close-mount shortlist. It is not a mounting specification. The chassis may place the lens differently relative to the ceiling plate or floor housing, and the published offsets differ. Reusing a bracket can put the replacement lens at a different height or distance even when the bracket itself does not move.
Measure from the lens, not from the front of the housing or the center of the mounting plate. Check the installation drawing for each orientation. If using a floor enclosure, confirm body clearance, lens opening and cooling airflow for the exact projector model.
What can you realistically reuse?
| Existing component | Reuse test | Why it matters |
|---|---|---|
| Impact screen | Inspect condition, texture, usable image area and intended shape | More pixels cannot repair a worn or badly positioned surface |
| Ceiling mount | Verify load, fastening pattern and lens location | A similar throw ratio does not establish mechanical compatibility |
| Floor housing | Obtain an explicit fit check for the replacement model | Enclosure size, lens opening and ventilation all matter |
| HDMI route | Test the intended resolution, refresh rate and full cable length | A cable working at 1080p may fail with the desired 4K signal |
| PC | Test the actual simulator settings and output | Displaying a 4K desktop is not a 4K game-performance benchmark |
| Launch monitor | Check software integration independently | Tracking data and projector resolution are separate parts of the system |
This reuse check is the practical difference between a $500 projector decision and a larger system upgrade. It also keeps you from replacing equipment that already performs its job.
Two honest upgrade budgets
Case one: the PC, cable and mount already qualify. Your initial comparison is the $500 projector difference, plus any model-specific adapter or installation adjustment. Do not add a new PC merely because the projector can display 4K.
Case two: you are buying the computer at the same time. Our SG3-5602 is $2,249, with RTX 5060 graphics and 16GB memory. The SG3-5702 is $3,199, with RTX 5070 graphics and 32GB memory. Those catalog configurations create a $950 computer-price difference.
Pairing AH500ST with SG3-5602 totals $4,248. Pairing LK830ST with SG3-5702 totals $5,698. The illustrative difference becomes $1,450, before mounting, software and other equipment. These are equipment combinations to evaluate, not a guarantee of a particular frame rate or a statement that every 4K buyer needs the second computer.
If you already own a PC, substitute its upgrade cost instead. GSPro publishes computer guidance; other programs and launch monitors have their own requirements. Match those requirements to your actual workload, including additional displays and recording applications.
Who should keep the AH500ST?
Keep the 1080p plan if the source is limited to 1080p, the projected data is comfortably readable and the extra cost would come out of a more urgent part of the build. A good mat, appropriate protection and correct mounting can be more valuable than a resolution increase you are not set up to use.
Also pause if your main complaint is a washed-out image. Both models have the same rated ANSI output. First identify screen lighting, image size and picture settings. This comparison does not establish that the LK830ST will solve a contrast problem caused by the room.
Who has a strong reason to buy the LK830ST?
The clearest candidate has a close lens position, a suitable 4K source and a desire for more detail on a large image or in small on-screen information. The buyer should also be willing to verify cable bandwidth and exact mounting geometry.
If the room requires optical zoom or a longer throw, neither fixed lens should be forced into that role. Use our LK830ST versus AK700ST room-fit guide to evaluate a different installation route.
Can I swap them without changing the projected image height?
Do not assume so. The specified offsets differ, and the lens-to-mount geometry also matters. Consult both drawings and test alignment before committing to existing holes or a fixed housing.
Does buying the LK830ST force every session to run at 4K?
No. You can choose an appropriate supported source output, but buying 4K hardware only creates the option to use that detail. It does not ensure your source supplies it or your software renders it.
Recommendation: price the LK830ST when your reuse checks pass. Choose the AH500ST when a planned 1080p system meets the job. Decide with the whole upgrade invoice, not the projector line alone.
Sources and assumptions
AH500ST specifications, LK830ST specifications and GSPro system guidance. Prices are Indoor Golf Kit USD listings checked October 28, 2026. Distance examples assume a native 16:9 image and remain subject to each model’s installation limits.
Cover: installation example from Carl’s Place’s room gallery. The pictured equipment is not the exact component list evaluated in this article.
