BenQ

BenQ TH671ST

Ranked #29 in Projectors

56 LP on the category ladder what's LP?

An aging lamp-based 1080p unit coasting on reputation. Its light source degrades on a schedule modern lasers made obsolete.

Consolidated from 16 cited sources across 15 outlets

Where the cited sources landed, as we read them

15 positive sources
1 mixed source

See the sources

Flagged as a product to avoid

3 of 7 research runs entered this as a product to avoid rather than a pick. A trap is a product buyers genuinely cross-shop but should not buy, ranked honestly alongside the real picks rather than dropped to the bottom. Why the boards include them

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Pros & cons

✓ Well-liked 1080p short-throw design
✓ Longstanding reputation on gaming-projector lists

✗ Lamp degrades quickly and noticeably compared with laser
✗ Ongoing replacement lamp costs
✗ 1080p resolution is dated
✗ Poor 2026 buy at its street price; current lasers outlive and outclass it

The sources behind this ranking

We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found.

Evidence 8 articles, 6 video reviews and 2 community sources

15 positive sources

Golfer Logic David McSweeney · reviewer · Jan 2026

The BenQ TH671ST can be set from 0.69:1 to 0.83:1 ratios which – put simply – means you can project a quality image into your enclosure and directly onto your impact screen from as little as 4.5ft-5 ft away. That’s well inline with the approx 7-8ft distance that the average projector is going to be mounted from the impact screen. Tech wise, the BenQ TH671ST is rated at 3k lumens and has 10k hours of lamp life. SmartEco modes are on offer and you’ll get a 16.67ms low input lag (i.e. basically nothing).

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Chris Majestic Chris Majestic · 303K subscribers · Dec 2017

This is a review of the BenQ TH671ST, a short throw gaming projector. With 3000 lumens of brightness and the capability of displaying a 100" screen from only 5ft away, it makes a great projector for gamers or people or who want a large screen in a small room. The video also compares the TH671ST to the Optoma GT1080 and the BenQ HT2150ST

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Abrams Artists Agency - Harry Abrams · reviewer · Aug 2026

Setting up the BenQ TH671ST is straightforward with dual HDMI ports and automatic keystone correction. Maintenance is simple, but keep in mind that the built-in speaker is best for casual use rather than large rooms or audiophile setups. Careful positioning is needed to avoid shadows due to the short throw lens. Best for: Gamers and home theater enthusiasts seeking a compact, easy-to-install projector with vibrant Full HD visuals and responsive performance.

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Raymond Strazdas Raymond Strazdas · 141K subscribers · Jan 2018

With 3000 lumens of brightness, low-input lag for games and the short throw capability of displaying a 100" screen from only 5 feet away, it makes a great projector for gamers or anyone looking for a home theater system!

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Eneba Jo Anna Bradshaw · reviewer · May 2026

The BenQ TH671ST delivers low‑lag precision, short‑throw convenience, and serious brightness at a price most gaming monitors can’t match. It’s compact but feels purpose‑built for play. I also appreciate BenQ’s game mode tuning: brighter whites, deeper shadows, no motion blur. It’s out-of-the-box friendly with consoles or PCs, and the dual HDMI ports let you keep both hooked up at once. It’s perfect for your next competitive game night .

Read J JoelsterG4K JoelsterG4K · 60.9K subscribers · Dec 2017

This is the TH671ST Short throw projector by BenQ, this is excellent for gaming and 1080p content like Blue Ray movies, with its short throw features is excellent for small rooms and with its 16ms of input lag makes it great for FPS games

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Coolblue Laurence · reviewer

If you want to place the projector as close to the screen as possible, the BenQ TH671ST is something for you. You can place this short throw projector close to the projection surface, so your pupils can't walk in front of the image. This allows you to project a 100-inch projection from 1.5m away. Thanks to the 3000 ANSI lumens light output, the pupils will also see sharp images in daylight.

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Tech Insider Tech Insider · 3K subscribers · Mar 2025

BenQ markets this projector heavily towards gamers and for good reason. The low input lag is where this projector truly excels. It's designed to keep up with the fast-paced action of consoles like the Xbox One X and PS4 Pro, minimizing motion blur and ensuring a smooth, responsive gaming experience.

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DogFurnitureGuide.com CC · reviewer

The TH671ST is the budget classic, the AK700ST is the purpose-built golf model, and the LK936ST is the premium laser unit for studios that want no compromises. BenQ has effectively built a ladder for the category, and most home builders end up on one of its rungs.

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NTTIPS NTTIPS · 88 subscribers · Nov 2020

The BenQ TH671ST stands out in the gaming projector market with its combination of high-resolution display, minimal input lag, and versatile placement options thanks to its short throw design. Whether you're setting up a dedicated gaming room or enhancing your living space, this projector delivers exceptional performance and value.

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Eneba June Derick Reyes · reviewer · May 2026

My Verdict: The BenQ TH671ST offers good performance and useful features without costing too much, which makes it a solid entry point if you’re new to projectors.

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This little powerhouse promises big-screen entertainment in small spaces, and after spending some quality time with it, here's what I found.

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Chasing The Tour backpacker1964 · owner · Mar 2024

Bought the projector new 5 years 1 month ago; so original lamp lasted along time.

Watch I Instagram Instagram post

BenQ TH671ST Built for stunning big-screen entertainment anywhere. Get yours now!

View post B r/budgetprojectors u/hms11 · owner

Hi OP, based on everything in your post, the BenQ TH671ST would be the best fit.

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1 mixed source

Top Shelf Golf Top Shelf Golf · reviewer

If you can find it in stock, it combines the 1080p resolution of the TH671ST with the ultra-short throw ratio of the ZW350ST -- the best of both at this price. But for reliable availability, the ZW350ST and TH671ST are your best bets.

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Frequently asked questions

It ranks #29 of 29 on our projectors tier list, in F tier. That placement draws on 16 cited sources across 15 outlets.

None of the 16 sources with a clear view is critical of it. Lamp degrades quickly and noticeably compared with laser. Ongoing replacement lamp costs. 1080p resolution is dated. Poor 2026 buy at its street price; current lasers outlive and outclass it.