Using the BenQ TH671ST in a Home Golf Simulator

The BenQ TH671ST is a reasonable way to put a sharp 1080p image on a home impact screen without spending thousands on the projector alone.

It has a useful short-throw lens and a 3,000-ANSI-lumen rating.

The compromise is its lamp.

You should plan for lamp life, replacement cost, and tighter light control than you might need with a brighter laser model.

I would look at it for a smaller bay used a few evenings a week.

I would hesitate if the screen is very wide, the room has daylight on it, or the simulator will run for long daily sessions.

The low purchase price is only part of the ownership calculation.

It Covers the Basic Simulator Picture Well

BenQ’s TH671ST specifications list a 1920 × 1080 image with a native 16:9 shape.

That is enough detail for course play, scoreboards, and practice ranges on a modest impact screen.

From the hitting area, the screen fabric and the game’s graphics settings may matter more than the difference between 1080p and 4K.

The 0.69–0.83 throw ratio suggests a lens-to-screen position around 6.9–8.3 feet for a ten-foot-wide image.

BenQ includes 1.2× optical zoom, so you have some flexibility after choosing the mount.

Measure the actual visible screen width and account for the black borders.

A projector image that spills onto enclosure fabric can make a new setup look unfinished even if the center looks sharp.

Keep Light off the Screen

The 3,000-lumen rating gives the TH671ST more light than an ordinary dim theater projector, but an impact screen under bright fixtures can still look washed out.

I would first keep direct light off the screen and put task lighting over the golfer or behind the hitting area.

That arrangement keeps the ball and clubs visible without washing out the projected course.

The Lamp Changes the Long-Term Budget

Unlike many newer golf projectors, the TH671ST uses a replaceable lamp.

BenQ rates it for 4,000 hours in normal mode and longer in Eco, SmartEco, or LampSave modes.

Those longer figures depend on how the projector is operated, and the image may be dimmer in the lower-power modes.

If you play several hours every day, the lamp is an eventual expense and service task.

Check the current price and availability of an authentic replacement lamp before buying the projector, especially if you expect to keep the bay for years.

Also leave enough access to remove and replace the lamp without dismantling the whole ceiling setup.

The lamp is not automatically a deal breaker.

A golfer who plays twice a week may get a long time out of it.

An inexpensive lamp-based projector can free budget for an impact screen that rebounds safely, a comfortable hitting mat, or a PC that does not stutter.

I would decide based on expected use rather than treating laser as a mandatory badge.

Estimate Lamp Ownership Cost

Before choosing a lamp projector, write down an ownership estimate rather than comparing only sticker prices:

• Estimate the hours of golf, movies, and other use each week.
• Check the current price and availability of a genuine replacement lamp.
• Decide whether Eco mode is bright enough and whether the lamp will be easy to reach after mounting.

This does not predict an exact replacement date.

It tells you whether the TH671ST’s lower initial cost stays attractive for the way you will actually use the room.

Mounting Tools Are Basic

BenQ lists vertical keystone adjustment, but no horizontal keystone or optical lens shift for the TH671ST.

That makes a centered, square mount important.

The official 102.5% offset also affects where the image lands relative to the lens, so do not drill at the screen center without checking BenQ’s mounting diagram.

The projector’s position should be drawn alongside the golfer and the ball.

If it sits near the hitting area, make full swings with a driver and check for both club clearance and body shadows.

If it sits farther forward, think about high shots, screen rebound, and how the cables will be protected.

A short-throw lens solves image width; it does not make a bad physical location safe.

Screen Shape Can Reduce the Image

A 16:9 picture also will not fill every golf enclosure.

If your usable screen is taller, you may have unused area or need a different PC output shape.

The TH671ST’s lower cost is attractive, but it has fewer installation aids than newer BenQ golf models with Screen Fill and automatic fitting.

That can mean more careful manual setup.

This model also needs an ordinary wired signal path.

Its HDMI inputs can take a PC or another source, but the projector does not supply course software, shot tracking, or a launch monitor.

Include a suitable cable run in the installation budget.

If the PC sits away from the bay, plan the route before the ceiling is finished rather than leaving a cable exposed across the practice area.

Where the TH671ST Makes Sense

Shop Indoor Golf listed the TH671ST at $949 on September 16, 2026.

That is far below the laser projectors in this BenQ batch.

It can be a good purchase if you can darken the room, live with normal 1080p detail, and accept a future lamp change.

The LED Alternative Changes the Trade

The AW30ST is a nearby alternative with an LED light source and a 16:10 image, but it displays fewer pixels than this 1080p model.

The AH700ST costs considerably more, yet its 4,000-lumen laser and automatic setup tools may be easier to justify for a busy or brighter home bay.

The right choice depends on the room and expected hours, not just the first price on a product card.

I would buy the TH671ST for a controlled, occasional-use simulator where a clean central mount is available.

I would spend more on a brighter lamp-free unit for a large, bright, frequently used room.

That is an operating-cost decision as much as a picture-quality one.

The other factor is the screen itself.

A premium impact screen can make a modest 1080p projector look clearer than a loose or wrinkled surface.

If the projector savings help you buy a well-tensioned screen and safer enclosure, the resulting room may be better balanced than one built around a more expensive projector and compromised elsewhere.