Projector short focus BenQ TH671ST

BenQ TH671ST is a 1080p short-throw home cinema projector that delivers up to a 100" diagonal image from about 1.5 m distance, with 3000 ANSI lm brightness and DLP technology for a high-contrast, detailed picture. Thanks to its low input lag and dedicated gaming modes, it is especially suitable for console and PC gaming, as well as sports broadcasts and movies in a living room or gaming space.

Detailed Description

The BenQ TH671ST is a short-throw Full HD (1920x1080) DLP projector designed for big-screen fans who don’t have much space but want a true cinema and gaming experience at home. Its short-throw lens allows projection of an approximately 100-inch image from a distance of about 1.5 m (4.9 ft), making it ideal for small rooms, attics, or gaming corners close to a wall.

With 3000 ANSI lumens brightness and around 10,000:1 contrast, the projector maintains a clear, vibrant image even in dim daylight or with lights on. DLP technology ensures good micro-contrast and smooth motion, important for sports broadcasts and fast-paced scenes.

One of its key strengths is the low latency—around 16–16.7 ms at 1080p/60 Hz, and even lower at higher refresh rates, which makes it highly suitable for console and PC gaming. Combined with fast DMD response and dedicated gaming modes, this minimizes motion blur and controller-to-screen delay.

The TH671ST offers automatic vertical keystone correction (up to about ±40°), which simplifies table or ceiling setup when the projector isn’t perfectly centered to the screen. Built-in features such as BenQ LumiExpert can adjust brightness according to ambient light, keeping the image comfortable for the eyes under different conditions.

The device includes 2 x HDMI inputs, VGA (D-sub), audio in/out, and USB, allowing easy connection to consoles, PCs, streaming devices, Blu-ray players, and set-top boxes. The built-in speaker is convenient for quick use, but for a more serious cinema or gaming setup, an external audio system can be easily added via the available audio outputs.

Its compact body—measuring about 296 x 120 x 224 mm and weighing around 2.7 kg—makes it easy to move between rooms or set up temporarily for movie nights and parties. Combined with the short-throw optics, this is a practical solution for people who can’t install a permanent projector in a large living room but want a big screen whenever they need it.

Unique Advantages

• Short-throw optics – about 100" diagonal from approx. 1.5 m, ideal for small spaces.

• Full HD 1080p DLP image with good contrast around 10,000:1 and smooth motion.

• High brightness of 3000 ANSI lm for viewing in brighter rooms or semi-dark conditions.

• Low input lag of about 16–16.7 ms, suitable for console and PC gaming.

• Dedicated gaming and cinema modes for better dynamic scene and sports rendering.

• Automatic vertical keystone correction (±40°) for easier installation.

• Rich connectivity – dual HDMI, VGA, audio in/out, USB for various sources.

• Compact size and relatively low weight for easy relocation and temporary setups.

Ideal For

• Console gaming (PlayStation, Xbox, Nintendo Switch) with a large screen and low latency.

• PC gaming and gaming rooms with limited space.

• Home cinema in a living room, bedroom, or small spaces.

• Watching sports events with friends on a large screen.

• Golf and other simulators where short-throw projection is an advantage.

• Temporary installations for presentations, parties, or movie nights.

Key Innovations

• 0.65" DLP chip for detailed Full HD image and color stability over time.

• LumiExpert or similar adaptive brightness system based on ambient light.

• Vertical digital keystone correction for more flexible positioning.

• Low input lag and optimized game mode with fast DMD response.

• Lamp life up to around 4000 hours in Normal mode and significantly more in Eco/SmartEco modes, reducing maintenance costs.

• Built-in speaker for basic sound without additional equipment during quick setups.

Technical Specifications

General

• Type: Short-throw home cinema / gaming projector

• Technology: 1-chip DLP

• Native resolution: 1080p (1920 x 1080)

• Aspect ratio: 16:9 (supports other formats)

Image

• Brightness: 3000 ANSI lumens

• Contrast (dynamic): around 10,000:1

• Color depth: 30-bit, up to 1.07 billion colors (depending on configuration)

• Image size: approx. 60"–300" depending on distance

• Short-throw: approx. 100" at ~1.5 m (4.9 ft)

• Vertical keystone: approx. ±40° (digital)

Light Source

• Lamp type: High-pressure UHP projector lamp

• Lamp life: around 4000 h (Normal), more in Eco/SmartEco

Connectivity

• HDMI inputs: 2 x HDMI (HDCP compatible)

• PC input: 1 x D-sub 15-pin (VGA)

• Audio in: 3.5 mm jack

• Audio out: 3.5 mm jack for external speakers

• USB: 1 x USB (Type-A or mini for service/power depending on configuration)

Audio

• Built-in speaker: mono, 5W (typical for this class)

Physical

• Dimensions (W x H x D): approx. 296 x 120 x 224 mm

• Weight: 2.8 kg

• Noise level: approx. 33 dB (Normal) / 29 dB (Eco)