BenQ TK710STi vs BenQ TH671ST
BenQ TK710STi (#1, best overall) vs BenQ TH671ST (#5): in our Projectors for Golf Simulators scoring the BenQ TK710STi totals 9.1/10 and the BenQ TH671ST 8.2/10, the BenQ TK710STi leading on Image Brightness & Quality and Reliability & Maintenance and the BenQ TH671ST on Value.
We may earn a commission when you buy through our links. Prices and availability shown are accurate as of Jul 18, 2026 and are subject to change; the merchant's price at purchase applies.
TopsFive comparison scores
Side by side
| BenQ TK710STi | BenQ TH671ST | |
|---|---|---|
| Price | $1899 | $949 |
| Resolution | 4K UHD (3840×2160) | 1080p Full HD |
| Rated Brightness | 3,200 ANSI lumens | 3,000 ANSI lumens |
| Throw Ratio | 0.69–0.83:1 (short throw) | 0.69–0.83:1 (short throw) |
| Lowest Input Lag | 4.2 ms (1080p/240Hz); 16.7 ms (4K/60Hz) | 16.7 ms (1080p/60Hz) |
| Light Source | Laser (LED-free DLP) | Lamp (DLP) |
| Light Source Life | 20,000 hours | 4,000–15,000 hours (LampSave) |
| Zoom & Adjustment | 1.2x optical zoom, 3D keystone | 1.2x optical zoom, auto vertical keystone |
| 100" Image From | About 5 ft (at 0.69:1) | About 4.9 ft |
How they differ in real use
Built from our projectors for golf simulators scoring, each product's published specifications, and verified owner feedback — not hands-on testing.
Both the BenQ TK710STi and the BenQ TH671ST made our Top 5 Projectors for Golf Simulators, at #1 (best overall) and #5. The best all-around golf-sim projector you can actually buy on Amazon: true 4K resolution makes course textures visibly sharper on a 10-foot impact screen than any 1080p rival, input lag is the lowest here at 1080p (4.2 ms at 240Hz), and its 1.2x optical zoom is the only real mounting flexibility in the group. It edges the brighter Optoma GT2400HDR because resolution and placement flexibility matter for the life of the build, while its brightness deficit (about 2,478 ANSI measured by ProjectorCentral) is solvable with basic light control. The most proven projector in home golf simulation — sim specialists from Carl's Place to Rapsodo have packaged it for years, and its 1.2x zoom makes placement more forgiving than any fixed-lens Optoma. It ranks last in 2026 on hardware economics alone: its lamp dims with age and lacks dust sealing, and at its current Amazon price it costs more than the brighter, laser-based GT2000HDR. Choose it for the track record and zoom flexibility, not the spec sheet.
We score projectors for golf simulators on Image Brightness & Quality (30%), Input Lag (20%), Throw & Mounting Flexibility (20%), Reliability & Maintenance (15%) and Value (15%). On that basis the BenQ TK710STi totals 9.1 out of 10 and the BenQ TH671ST 8.2. The widest gap is Image Brightness & Quality, where the BenQ TK710STi scores 9.6 against 8 for the BenQ TH671ST — lumens on an impact screen, resolution, and color. Reliability & Maintenance also separates them: 9 for the BenQ TK710STi versus 7.2 for the BenQ TH671ST. The BenQ TH671ST claws back ground on Value.
On paper, the specifications that actually differ: Resolution — 4K UHD (3840×2160) on the BenQ TK710STi versus 1080p Full HD on the BenQ TH671ST; Rated Brightness — 3,200 ANSI lumens on the BenQ TK710STi versus 3,000 ANSI lumens on the BenQ TH671ST; Lowest Input Lag — 4.2 ms (1080p/240Hz); 16.7 ms (4K/60Hz) on the BenQ TK710STi versus 16.7 ms (1080p/60Hz) on the BenQ TH671ST; Light Source — Laser (LED-free DLP) on the BenQ TK710STi versus Lamp (DLP) on the BenQ TH671ST; Light Source Life — 20,000 hours on the BenQ TK710STi versus 4,000–15,000 hours (LampSave) on the BenQ TH671ST; Zoom & Adjustment — 1.2x optical zoom, 3D keystone on the BenQ TK710STi versus 1.2x optical zoom, auto vertical keystone on the BenQ TH671ST. They match on Throw Ratio.
Pricing as of July 18, 2026: $1,899 for the BenQ TK710STi and $949 for the BenQ TH671ST, a $950 difference in the BenQ TH671ST's favor. Owners praise the BenQ TK710STi for true 4K UHD resolution resolves course textures, grain on greens, and distant fairways far more sharply than the 1080p alternatives and 1.2x optical zoom plus 0.69-0.83:1 throw ratio gives real mounting flexibility — the only projector here that lets you fine-tune image size without moving the mount; the most common complaint is projectorCentral's measurements put real output around 2,478 ANSI lumens in the brightest mode — about 23% below the 3,200 rating, and practical calibrated modes are dimmer still. Owners praise the BenQ TH671ST for the most proven projector in home golf simulation, with years of owner installs and setup guides from Carl's Place, Rapsodo, and other sim specialists and 1.2x optical zoom and auto vertical keystone make placement more forgiving than any fixed-lens Optoma; the most common complaint is lamp light source dims over time and eventually needs replacement (rated 4,000 hours in normal mode, up to 15,000 in LampSave) — every laser pick here is rated 20,000-30,000 hours.
BenQ TK710STi
- True 4K UHD resolution resolves course textures, grain on greens, and distant fairways far more sharply than the 1080p alternatives
- 1.2x optical zoom plus 0.69-0.83:1 throw ratio gives real mounting flexibility — the only projector here that lets you fine-tune image size without moving the mount
- Very low input lag (4.2 ms at 1080p/240Hz, 16.7 ms at 4K/60Hz) for lag-free simulator response
- 20,000-hour laser light source means no lamp replacements over the life of a home sim
- ProjectorCentral's measurements put real output around 2,478 ANSI lumens in the brightest mode — about 23% below the 3,200 rating, and practical calibrated modes are dimmer still
- At around $1,899 it costs roughly $700 more than the brighter (though 1080p) Optoma GT2400HDR
- Needs about 7 ft of throw for a 10-ft-wide screen — tight bays under 11 ft deep may need the Optomas' 0.496:1 lens instead
BenQ TH671ST
- The most proven projector in home golf simulation, with years of owner installs and setup guides from Carl's Place, Rapsodo, and other sim specialists
- 1.2x optical zoom and auto vertical keystone make placement more forgiving than any fixed-lens Optoma
- 16.7 ms input lag and a dedicated low-latency game mode keep simulator response crisp
- Dual HDMI inputs and a built-in 5W speaker simplify simple one-cable setups
- Lamp light source dims over time and eventually needs replacement (rated 4,000 hours in normal mode, up to 15,000 in LampSave) — every laser pick here is rated 20,000-30,000 hours
- At around $949 on Amazon it currently costs more than the brighter, laser-based Optoma GT2000HDR
- No dust sealing, which matters in garage bays where turf infill and dust circulate
Which should you buy?
The BenQ TK710STi is the better fit for sim bays 11-16 ft deep where 4K sharpness is the priority and gSPro players who want the lowest possible input lag — it is the higher-scoring pick here, chiefly for Image Brightness & Quality and Reliability & Maintenance. The BenQ TH671ST is the better fit for buyers who want the most documented, widely-supported entry sim projector and installs that need zoom flexibility on a budget, and the stronger choice if Value matters more to you than the overall score. If the $950 saving matters more than Image Brightness & Quality, the BenQ TH671ST is the better value. The BenQ TK710STi is a poor fit for bays shallower than about 11 ft (throw distance won't fit); the BenQ TH671ST is a poor fit for set-and-forget garage installs (lamp maintenance, no dust sealing).
Choose the BenQ TK710STi if
- Sim bays 11-16 ft deep where 4K sharpness is the priority
- GSPro players who want the lowest possible input lag
- Rooms with good light control where measured brightness suffices
Skip it if
- Bays shallower than about 11 ft (throw distance won't fit)
- Bright garages that need maximum lumens per dollar
Choose the BenQ TH671ST if
- Buyers who want the most documented, widely-supported entry sim projector
- Installs that need zoom flexibility on a budget
- Multi-use rooms where the projector doubles for movies and gaming
Skip it if
- Set-and-forget garage installs (lamp maintenance, no dust sealing)
- Bright rooms needing 4,000+ lumens
Common questions
Is the BenQ TK710STi better than the BenQ TH671ST?
In our Projectors for Golf Simulators ranking the BenQ TK710STi scores higher overall, 9.1 to 8.2, with the biggest advantage in Image Brightness & Quality. The BenQ TH671ST is stronger on Value, so it is the better pick if that matters most to you.
How much more does the BenQ TK710STi cost than the BenQ TH671ST?
$950 more as of July 18, 2026: $1,899 for the BenQ TK710STi against $949 for the BenQ TH671ST. Prices move, so the merchant page shows the current figure. What the extra buys is mostly Image Brightness & Quality — 9.6 versus 8 in our scoring.
What is the main difference between the BenQ TK710STi and the BenQ TH671ST?
The headline spec difference is Resolution: 4K UHD (3840×2160) on the BenQ TK710STi versus 1080p Full HD on the BenQ TH671ST. In use, the gap that matters most is Image Brightness & Quality (9.6 vs 8 in our scoring): lumens on an impact screen, resolution, and color.