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TV & Home Theater

BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector

4.5 / 5Demo rating
$800best of 2 vetted listings · atBest Buybestbuy.com
Also at
B&H Photo Video$849

Variants

1 option

Find the best prices

Updated 4h ago
All-time high
$849
Average price
$825
All-time low
$800
Current best
$800

Based on 2 verified price checks since Oct 28, 2026.

Price history

Daily lowest verified store price · Oct 28, 2026 · USD

Our verdict

The TH671ST is a sensible fit when short projection distance and responsive Full HD gaming matter more than resolution. Its 1080p ceiling and lamp upkeep make it less appealing for buyers seeking a long-term 4K upgrade.

Pros

  • +Short-throw optics accommodate a large image in rooms with limited depth.
  • +Low specified input lag suits 1080p/60Hz gaming.
  • +Optical zoom and two HDMI inputs provide useful setup flexibility.

Cons

  • −Full HD resolution limits detail compared with 4K projectors.
  • −Lamp-based illumination introduces eventual lamp-replacement costs.

Compare with alternatives

ViewSonic PX706HD

Another 1080p short-throw gaming projector with a 0.69–0.83 throw ratio and 1.2× optical zoom; it also offers USB-C input.

Compare prices →

BenQ TH575

A 1080p alternative rated at 3800 ANSI lumens, but its 1.49–1.64 throw ratio requires more projection distance.

Compare prices →

Specifications

Light source
Lamp
Rated lamp life
4000 hours Normal; 10000 hours Eco/SmartEco; 15000 hours LampSave
Rated brightness
3000 ANSI lumens
Native resolution
1920 × 1080; 16:9
Projection technology
DLP

About BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector

BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector

We track the BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector across major US retailers and sort every verified offer from lowest to highest price. Prices are checked against the stores' own product pages and refreshed regularly, so the deal you see is the deal you get.

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Frequently asked

How much space is needed for a 100-inch picture?

B&H specifies approximately 5 feet between projector and screen for a 100-inch image at the short end of its zoom range.

Does it display native 4K?

No. Its native resolution is 1920 × 1080.

Is it suitable for gaming?

Its manufacturer-rated 16.7 ms input lag at 1080p/60Hz makes it worth considering for Full HD gaming.

Do I need separate speakers?

Not for basic playback: it includes a 5W speaker. A 3.5 mm output allows external audio connections.

Will its lamp need replacement?

It uses a replaceable lamp rather than a laser. Rated life varies from 4000 to 15000 hours depending on operating mode.