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BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector

BH #BETH671ST • MFR #TH671ST
27 reviews
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BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector
Key Features
  • Brightness of 3000 ANSI Lumens
  • Full HD (1920 x 1080) Native Resolution
  • 1.2x Zoom and 0.69 to 0.83:1 Throw Ratio
  • Two HDMI 1.4a Inputs, 1 with MHL Support
Enjoy your video games and multimedia content on a big screen with the BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector. It features 3000 ANSI lumens of brightness and a 10,000:1 dynamic contrast ratio, plus a number of features to enhance color accuracy. The projector has two HDMI inputs, one of which is MHL-compatible, for connecting your digital HD devices such as a gaming console, Blu-ray player, or cable/satellite box. The MHL-compatible HDMI input accepts wired connections from your smartphone or tablet for mirroring. Its built-in 5-watt speaker eliminates the need for external speakers if none are convenient. The TH671ST includes a VGA cable and an IR remote control.
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BenQ TH671ST Overview

Enjoy your video games and multimedia content on a big screen with the BenQ TH671ST Full HD Short-Throw DLP Home Theater Projector. It features 3000 ANSI lumens of brightness and a 10,000:1 dynamic contrast ratio, plus a number of features to enhance color accuracy. The projector has two HDMI inputs, one of which is MHL-compatible, for connecting your digital HD devices such as a gaming console, Blu-ray player, or cable/satellite box. The MHL-compatible HDMI input accepts wired connections from your smartphone or tablet for mirroring. Its built-in 5-watt speaker eliminates the need for external speakers if none are convenient. The TH671ST includes a VGA cable and an IR remote control.

Take Video Games to the Big Screen
With Full HD resolution, 3000 lumens of brightness, a low 16.67 ms input lag, a 5W built-in speaker, and a simplified setup, the TH671ST can expand your gaming world.
Fast Response for Smooth Gaming
The TH671ST brings a low 16.67 ms input lag and microsecond DMD response time for a smooth gaming experience without unwanted motion blur and image lag.
LumiExpert Technology
BenQ's LumiExpert technology is designed to actively detect ambient light conditions in your viewing environment and automatically adjust visual brightness.
Dedicated Picture and Sound Modes
The TH671ST features Cinema, Music, Sports, and Game modes to customize your entertainment experience.
3000 Lumens of Brightness for Lights-On Enjoyment
The 3000-lumen brightness level lets you enjoy your media with the lights on, making it well suited for living rooms and group settings.
Short Throw Ratio for Nearly Any Space
The TH671ST needs only 5' to project a 100" image, reducing space constraints and setup hassles.
Vertical Keystone Correction
Countering the trapezoid effect when the projector is placed off center relative to the vertical axis, vertical keystone correction adjusts the image for a squared-off image, making it easy to project from a tabletop or a ceiling mount.
Designed for Sharp Detail Clarity
DLP technology is able to produce well-defined sharpness in images and text by enhancing the fill ratio of individual pixels and employing SmartEco Technology.
Wireless Streaming with Optional Adapter
The optional QCast Mirror HDMI wireless adapter can instantly stream videos and photos from your compatible mobile devices to the big screen.
UPC: 840046037574

BenQ TH671ST Specs

Key Specs
Display System
DLP
Resolutions
Native: 1920 x 1080
Maximum Brightness
3000 Lumens (ANSI)
Throw Ratio
0.69 to 0.83:1
HDR Support
No
Audio/Video I/O
3.5 mm / HDMI / VGA
Light Source
Lamp
Image Display
Display System
DLP
Resolutions
Native: 1920 x 1080
Maximum Brightness
3000 Lumens (ANSI)
Offset
102.5%
Aspect Ratio
16:9
Contrast Ratio
10,000:1
3D Support
No
Color Depth
10-Bit (1.07 Billion Colors)
Lens
Includes Lens
Yes
Aperture
f/2.6 to 2.78
Focal Length
10.2 to 12.24mm
Lens Shift
No
Throw Distance
Short Throw
Throw Ratio
0.69 to 0.83:1
Features
Keystone Correction
Yes: Vertical ± 40°
HDR Support
No
Zoom
Yes: 1.2x Optical
Multi-Input Support (PIP/PBP)
No
Ceiling Mountable
No
Front/Rear Projection
Front
Built-In Speakers
Yes: 1x 5 W
Input/Output Connectors
Audio/Video I/O
1x VGA Video Input
1x VGA Video Output
2x HDMI Video
1x 1/8" / 3.5 mm Mini Audio Input
1x 1/8" / 3.5 mm Mini Audio Output
Other I/O
1x USB-A
1x Mini-USB (Service)
1x DE-9/DB-9 (RS-232)
1x 1/8" / 3.5 mm Mini (Remote) Input
1x 1/8" / 3.5 mm Mini (Remote) Output
HDCP Support
No
Media/Memory Card Slot
No
Hardware
Mobile App Compatible
No
Wireless
No
General
Light Source
Lamp
Expected Lamp Life
Full Brightness: 4000 Hours
Low Brightness: 10,000 Hours
Fan Noise
Full Brightness: 33 dB
Low Brightness: 29 dB
Security
No
Input Power
100 to 240 VAC, 50 / 60 Hz
Power Consumption
Standby Mode (Lamp Off): 0.5 W
Full Brightness: 320 W
Dimensions (W x H x D)
11.7 x 4.7 x 8.8" / 29.6 x 12.0 x 22.4 cm
Weight
6 lb / 2.7 kg
Packaging Info
Package Weight
8.265 lb
Box Dimensions (LxWxH)
16.15 x 12.7 x 6.6"

BenQ TH671ST Reviews

Surprising Little Projector

By Andrew
Rated 5 out of 5
Date: 2025-06-25

Great short throw projector! I was pleasantly surprised with how adept this was at projecting. Is it the brightest? No. But with the shades pulled or at night it should be plenty. I wish the foot adjustments were a little more flexible. For short throw projectors getting things level is tough sometimes and finer adjustments with more than just two feet would be better for me but it's nitpicky.

Great image and sound

By Murray
Rated 5 out of 5
Date: 2023-06-15

I was blown away by this projector from the start. I read a lot of reviews before purchasing, and I don't regret going with this one at all. The image is amazing in appropriate lighting, and surprisingly good even when there's ambient light in the room. (Still, I will be putting up blackout curtains for summertime use.) The most startling thing of all was how good the sound is. Yes, we mainly use our surround sound, but when we first set up the projector we watched several movies before we moved the surround sound system into the room and it was decent. We could understand all the dialogue, and the music and effects were surprisingly robust. I also love how easy this was to mount to the ceiling.

See any errors on this page?

How big of a picture can I project? It says 100” ...

How big of a picture can I project? It says 100” 5 feet away, what if I place it at 6 or 7 feet? Can I get a 120” clean picture?
Asked by: josh
Hello. Thank you for your question. Around the the 6-7ft distance you will be able to project a 120" screen without issues.
Answered by: BenQ Customer Service
Date published: 2024-04-08

I would like to connect a Bose sound bar. Do the ...

I would like to connect a Bose sound bar. Do the HDMI ports support HDMI ARC for audio through to a the Bose Sound Bar?
Asked by: Andrew
Hello. The TH671ST does not support ARC or eARC.
Answered by: BenQ Customer Service
Date published: 2025-12-02

Does this projector display at 4:3 aspect ratio?

Does this projector display at 4:3 aspect ratio?
Asked by: Chuck
Yes the BenQ TH671ST Full HD DLP Home Theater Projector can also display in 4:3 ratio.
Answered by: John J
Date published: 2022-01-07

How do I set up external speakers with this ...

How do I set up external speakers with this projector? I tried to connect my Bose speakers to the projector last night by using the audio out on the projector to audio in on the Bose. This didn't work. Do I have to go into the menu on the projector to get the sound to go through the Bose? Thank you.
Asked by: CHINA
The audio output is a line level so speakers must be self amplified and self-powered. The 1/8" (3.5mm)Analog Audio Output is always live.You have not mentioned the specific BOSE model. Please e-mail us: [email protected].
Answered by: Mark S
Date published: 2021-06-28

Does this projector have Toslink so my DAC can ...

Does this projector have Toslink so my DAC can handle the audio? Specs say it doesn't, but the B&H quick compare and the next BenQ model up have toslink.
Asked by: Paul
No it does not: BenQ TH671ST: Input Terminals: 1 x HDMI 1.4a 1 x HDMI 1.4a with MHL and HDCP 1.4 1 x 15-pin VGA 1 x 1/8" (3.5 mm) audio 1 x USB Type-A Output Terminals: 1 x 15-pin VGA 1 x 1/8" (3.5 mm) audio Other Connectors: 1 x USB Type-B mini 1 x RS-232 control You can use an adapter though: Gefen GTV-AAUD-2-DIGAUD - Analog Audio to Digital Audio Adapter: B&H # GEATVDA Analog to Digital Converter RCA Analog Input S/PDIF or TOSLink Output Simple Operation Compact Form You will also need these cables: C2G Value Series 3.5mm Stereo Male to 2 RCA Stereo Male Y-Cable (3') BH #CA39942 Hosa Technology Premium ADAT Toslink Male to Toslink Male Fiber Optic Cable - 10' B&H # HOOCTT10
Answered by: Mark S
Date published: 2021-05-27

Where are the apps on this?? How do I connect my ...

Where are the apps on this?? How do I connect my phone to it??
Asked by: Anthony
The BenQ TH671ST Full HD DLP Home Theater Projector BH #BETH671ST has no integrated internet streaming apps. Connect a Roku, Amazon FireTV stick, or an Apple TV to access streaming apps.
Answered by: Mark S
Date published: 2022-01-25
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