A projector for a golf simulator and movies has to solve two image layouts and one repeatable switching routine. Buying 4K is only part of that decision. A tall golf image and a widescreen movie can require different optical sizes even when they share the same physical screen.
Among these three BenQ models, start with the LK830ST if the lens must sit close to the screen, the AK700ST if 4K and camera-assisted golf-screen fitting are priorities, and the AH700ST if 1080p meets your needs and you still want Auto Screen Fit.
This guide compares those three models for a shared golf-and-movie room. It uses published specifications and calculated layouts, not a claim that we have tested them as home-theater projectors.
Choose how the room changes from golf to movies
| Room arrangement | What it simplifies | What you need to accept or verify |
|---|---|---|
| One 16:9 impact screen for both | The same image shape can serve golf and video | The golf software must suit that layout; the impact-screen surface still determines the viewing experience |
| A 4:3 or square impact screen, with a smaller widescreen movie inside it | No second screen or moving projector | Unused screen above and below movies; potentially additional digital reduction |
| A separate movie screen in front of the golf screen | A dedicated video surface | Separate lens-to-screen distances, focus and image-size checks; the movie screen must be retracted before golf |
Start with the first arrangement if keeping the operating routine simple matters most. A tall golf screen can still work well for a shared room, but the movie picture will not occupy its whole height unless you crop or distort the content. Stretching a 16:9 movie into a square is not a quality upgrade.
A 10-foot screen does not always mean the same movie size
On a 10 × 7.5-foot 4:3 impact screen, an uncropped 16:9 picture that uses the full width is 10 × 5.625 feet. That leaves 1.875 feet of unused height in total, or 11.25 inches above and below a centered picture.
A 2.39:1 movie using that same 10-foot width is approximately 4.18 feet high. The extra bars are a consequence of the film's shape, not evidence that the projector is defective. Some video releases change aspect ratio within the program, so evaluate a film you actually watch before designing fixed masking.
| Visible screen | 16:9 picture inside it | Unused height, total |
|---|---|---|
| 8 × 8 ft, square | 8 × 4.50 ft | 3.50 ft |
| 10 × 7.5 ft, 4:3 | 10 × 5.625 ft | 1.875 ft |
| 12 × 6.75 ft, 16:9 | 12 × 6.75 ft | 0 ft |
Use the visible white image area for these calculations. The enclosure's outside dimensions include framing and protection that do not become movie-screen area. For the broader choice of shape, see our screen aspect-ratio guide.
The fixed-mount test: will optical zoom cover both modes?
Consider a 10 × 7.5-foot screen. You want a full-height 4:3 golf image and a 10-foot-wide 16:9 movie. These are two different optical targets.
For golf using the full native height, the underlying 16:9 frame must be 7.5 feet high and 13.33 feet wide. For the movie to use the full native 16:9 frame at 10 feet wide, that frame is only 5.625 feet high.
| Projector | Full-height golf planning distance | Full native-frame movie distance |
|---|---|---|
| LK830ST, fixed 0.496 lens | 6.61 ft | 4.96 ft |
| AK700ST, 0.69–0.83 lens | 9.20–11.07 ft | 6.90–8.30 ft |
| AH700ST, 0.69–0.83 lens | 9.20–11.07 ft | 6.90–8.30 ft |
There is no overlapping lens position between the two columns in this example. The AK700ST and AH700ST's optical zoom range is not enough to make both target pictures use the full native frame from one fixed mount. The LK830ST has no optical zoom range to bridge them.
This does not mean you cannot watch movies. It means you should plan the smaller movie image within the larger golf-sized optical frame, using suitable source or projector scaling, rather than expect optical zoom alone to do everything. Verify the available size adjustment and switching steps on the chosen model before fixing the mount.
For a 4K frame sized exactly to the 7.5-foot golf height, the ideal 10-foot-wide movie area corresponds to approximately 2880 × 1620 image positions. The corresponding ideal area from a 1080p frame is 1440 × 810. These are geometric upper bounds before keystone, extra overscan or other scaling, not recommended HDMI timings or measured resolved detail. The 4K projector still has more image positions available, but the movie is not using all 3840 × 2160 across that smaller area.
If preserving the complete 16:9 frame for movies is a priority, choose a matching 16:9 golf layout or evaluate a separate screen and mounting plan. Use our projector calculator to compare both modes using your own dimensions.
Which BenQ suits your shared room?
LK830ST: start here when the lens must be close
The LK830ST combines a fixed 0.496 throw ratio with 4K output. Its practical advantage is the short optical distance. On the 10 × 7.5-foot full-height example above, the nominal lens position is about 2.59 feet closer to the screen than the nearest AK700ST or AH700ST position.
That space can matter around a beam or an existing hitting area. It is not automatic clearance for a golfer or a guarantee against shadows. Check lens height, the complete swing, the enclosure and the projector's ventilation as separate parts of the plan.
Screen Fill is available, but it is not the AK700ST/AH700ST camera-assisted Auto Screen Fit workflow. For audio, BenQ lists a 3.5 mm output on the LK830ST; plan a compatible powered speaker arrangement or route sound through an AV receiver. Do not assume the same eARC arrangement as the other two models.
Check the LK830ST's current price and connections.
AK700ST: 4K with a simpler golf-screen fitting process
The AK700ST offers 4K output, a 0.69–0.83 lens range, Auto Screen Fit and Quick Focus. It is a strong candidate when both video detail and convenient golf-screen alignment matter, and the room supports its farther-back lens position.
BenQ lists eARC audio return. Include an external movie source and check its connection alongside the golf PC. A camera that fits the golf screen does not automatically decide your preferred movie size, audio routing or source settings.
Check the AK700ST's current price and specifications.
AH700ST: keep the automatic fitting workflow at 1080p
The AH700ST uses the same published throw-ratio range and provides Auto Screen Fit, while its native output is 1920 × 1080. It can be a sensible allocation of the room budget when 1080p is sufficient and money saved will improve lighting control, seating or audio.
Its suitability depends on the final image size and viewing distance, not just whether movies are occasional. The full-height example above also shows why a smaller movie area uses fewer image positions than the native 1080p frame. BenQ lists eARC on this model too.
Check the AH700ST's current price and specifications.
Plan the signal and sound paths before buying cables
Write down the golf source, movie source, projector and audio device. There are two straightforward arrangements to evaluate:
- Sources into the projector: connect the golf PC and movie source to available inputs, then use a verified audio-output path to your sound system. On AK700ST and AH700ST, check the eARC port and sound-system compatibility. If eARC occupies a port needed by a source, include that in the input plan.
- Sources into an AV receiver: the receiver switches sources and handles sound, then sends video to the projector. Verify that the complete receiver-and-cable path supports the resolution, refresh rate, HDR format and copy protection required by your sources.
With two HDMI inputs, port count alone is not a finished connection plan. Check which ports are occupied, where each device gets power and whether the equipment is reachable without entering the hitting area. A streaming stick powered from USB still needs a suitable video connection and enough power.
Keep the audio decision separate from built-in speaker wattage. Placement, the room, the listener's position and the speakers themselves affect the result. Confirm sound from both sources before hiding the cables.
A practical golf-to-movie changeover card
- End the golf session. Remove balls and clubs from the seating route. Retract or cover equipment only as its manufacturer allows.
- Select the movie source and audio input. Confirm picture and sound together.
- Use an undistorted video layout. Check a circle or a familiar face; do not stretch widescreen video to fill a square golf screen.
- Set the intended picture size and mode. Check focus and edges from the seats, with the lighting you plan to use.
- Return to golf and verify it once. Restore the golf resolution and layout, check the software's visible controls and make sure any separate movie screen is fully clear.
Photograph the working menus or write down the settings for each source. Do not assume every source remembers every setting independently. A repeatable changeover is more useful than a room that looks excellent once and takes twenty minutes to restore.
Evaluate the screen from the seats as well as the hitting mat
Ask for a sample or demonstration of the actual impact-screen material. Look at small text, subtitles, a bright scene and a dark scene from the intended seating distance. Surface texture, tension and wrinkles can matter more at the seats than they did when you were focused on golf.
All three projectors carry a 4,000-ANSI-lumen rating. That common number does not establish identical output in Cinema or Golf mode, equal black levels or equal perceived contrast. Control light reaching the screen and assess the viewing mode you intend to use.
Before ordering, record six items: visible screen width and height, both intended image shapes, available lens position, viewing distance, source devices and audio route. Bring that plan to our simulator planning page, or compare the LK830ST, AK700ST and AH700ST once those constraints are clear.
Method: BenQ US model specifications checked October 18, 2026. Screen sizes, lens intervals and image-position examples are original calculations with a level, straight-on projector. Actual setup depends on supported adjustments, source behavior and installation tolerances.
