OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Projectors Methodology v3.0
Projectors Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Projectors Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Projectors Methodology v3.0

BenQ TH671ST review: 86 specs compared

Avg. price:~£700Native panel resolution:1920x1080ANSI lumens:3000Throw ratio:0.69-0.83:1Lamp life:4000 hours

BenQ TH671ST Review: Compare 86 technical specifications, 15 expert and video reviews and 1 best-of list to see how this product ranks in the Projectors category and whether it is worth buying.

BenQ TH671ST
7.1/10

Overall score

Score
7.1/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, best-of lists, expert reviews and owners.
How we count it
Parts: Technical score 35%, List score 30%, Reviews score 25%, Sentiment score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 53% of models
Score components

35%

6.1

Technical score

30%

6.1

List score

25%

8.7

Reviews score

10%

9.6

Sentiment score

▼Worse than 53% of projectors
7.0

Value for money

Value for money
7.0/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 50% of models
Score components

70%

7.1

Overall score

30%

6.8

Price

▲Better than 50%
6.1

Technical score

Technical score
6.1/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 67% of models
Score components

42%

6.8

Image Quality

22%

5.9

Projection & Lens

12%

5.5

HDMI & Gaming

10%

6.2

Audio & Features

8%

5.4

Connectivity

6%

4.6

Design & Power

▼Worse than 67%
8.7

Reviews score

Reviews score
8.7/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
Share: Reviews count 25% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 86% of models

80%

8.7

Average grade

20%

8.7

Popularity

Grades by review (15)
8 reviews: 3 with a printed score, 5 estimated from the review. 7 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
User ratings collected online are not part of this score.
▲Better than 86%
6.1

List score

List score
6.1/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (1)
List score: in 1 of 108 lists (1%)
▲Better than 76%
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Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.

What reviewers say about the BenQ TH671ST

Based on 9 · 9

Reviewers love it for gaming and its short throw with rich colour, but fan noise and limited connections are common gripes.
Praised
Mixed views
Criticised
Pick a topic to see who said what

What owners say about the BenQ TH671ST

Based on 28 owners sharing their experience in online comments

64%positive25%mixed11%negative

Owners praise the huge, impressive image; setup and placement hassles and motion sickness bring the clearest frustrations.

What owners dislike

  • Owners say positioning takes effort: keystone correction is often needed, and getting the image square and sharp can be fiddly to set up.4
  • Owners say fast camera movement in first-person shooters can cause motion sickness or nausea after a while. Some switch to a TV for these games.3

Points mentioned by at least 3 owners, most mentioned first.

Loading category ranking...

Projectors model ranking

Ranked #374 of 985 models in Projectors (Overall score)

Technical Specifications of projector BenQ TH671ST

Technical score
Technical score
6.1/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 35% of the overall score.
Score distribution
▼
<55-66-77-88-99-10
▼ Worse than 67% of models
Score components:

42%

6.8

Image Quality

22%

5.9

Projection & Lens

12%

5.5

HDMI & Gaming

10%

6.2

Audio & Features

8%

5.4

Connectivity

6%

4.6

Design & Power

6.1
Reviews score
8.7
List score
6.1
Value for money
Value for money
7.0/ 10
✕
What it is
An indicator that combines the projector's overall rating with its cost.
When it matters
When you are looking for a projector with a good balance between quality and price.
Score distribution
▼
<55-66-77-88-99-10
▲ Better than 50% of models
Score components:

70%

7.1

Overall score

30%

6.8

Price

7.0
ANSI lumens
3,000
Market range: <280 – >4k
This projector reaches 3,000 ANSI lumens, brighter than 62.9% of projectors and equal to 8.4% of projectors.
Contrast ratio
10,000:1
This projector has a contrast ratio of 10000:1, lower than 50.1% of projectors and equal to 7.4% of projectors.
Native contrast ratio.
Native panel resolution
1920x1080
This projector uses a native resolution of 1920x1080, higher than 27% of projectors and equal to 59.2% of projectors.
Output resolution
1920x1080
This projector supports output resolution up to 1920x1080, higher than 25.9% of projectors and equal to 42.3% of projectors.
Projection technology
DLP
Show more
What reviewers say
Throw ratio
0.69-0.83:1
Min throw distance
0.762 m
Market range: <0.5 m – >1.651 m
This projector needs a minimum throw distance of 0.762 m, shorter than 75.9% of projectors and equal to 1% of projectors.
Max projection size
300 inch
Market range: <120 inch – >301 inch
This projector supports projection sizes up to 300 inch, larger than 51.5% of projectors and equal to 38% of projectors.
Zoom ratio
1.2
Market range: <1.1 – >2.06
This projector offers a zoom ratio of 1.2, narrower than 59.8% of projectors and equal to 21.6% of projectors.
Motorized zoom
no
This projector does not have motorised zoom. 14.8% of projectors offer this.
Show more
What reviewers say
Input lag
16.67 ms
Market range: <8 ms – >68 ms
This projector has input lag of 16.67 ms, lower than 70.4% of projectors and equal to 0.4% of projectors.
In 1080P.
Auto low latency mode (ALLM)
no
This projector does not switch to low-latency mode automatically. 16.1% of projectors offer this.
Variable refresh rate (VRR)
no
This projector does not support variable refresh rate. 1.8% of projectors offer this.
HDMI version
1.4
This projector supports HDMI 1.4, older than 54% of projectors and equal to 35.7% of projectors.
Max HDMI bandwidth
10.2 Gbps
Market range: <10.2 Gbps – >48 Gbps
This projector supports HDMI bandwidth up to 10.2 Gbps, lower than 51.2% of projectors and equal to 46.5% of projectors.
Show more
What reviewers say
N. of HDMI ports
2
Market range: <1 – >2
This projector has 2 HDMI port/s, more than 45.9% of projectors and equal to 47.3% of projectors.
Wi-Fi connectivity
no
This projector does not connect to Wi-Fi networks. 53.4% of projectors offer this.
Wi-Fi version
N/A
Bluetooth connectivity
no
This projector does not support Bluetooth. 50.7% of projectors offer this.
Bluetooth version
N/A
Show more
What reviewers say
Smart TV features
no
This projector does not have built-in smart TV features. 43.9% of projectors offer this.
Operating system
none
Android OS
no
This projector does not run Android OS. 19.1% of projectors run Android OS.
Dedicated smartphone app
no
This projector does not come with a dedicated smartphone app. 36.8% of projectors come with a dedicated smartphone app.
Remote control
yes
This projector includes a remote control. 1.5% of projectors offer this.
Show more
What reviewers say
Light source type
lamp
This projector uses lamp light source technology, less advanced than 66.5% of projectors and equal to 33.5% of projectors.
Laser light source
no
This projector does not have a laser light source. 26.8% of projectors offer this.
Lamp life
4,000 hours
Market range: <3.5k hours – >30k hours
This projector offers lamp life of 4,000 hours, longer than 78.8% of projectors and equal to 9.6% of projectors.
Lamp life (eco mode)
?
Operating power consumption
320 W
Market range: <57 W – >390 W
This projector uses 320 W of power, more than 77.5% of projectors and equal to 0.9% of projectors.
Show more
What reviewers say

BenQ TH671ST vs the average projector

246810TotalImage QualityProjection & LensHDMI & GamingConnectivityAudio & FeaturesDesign & Power
  • 36.4% brighter image
    This projector has higher ANSI lumens than the average projector (3,000 vs 2,200). The average projector has 2,200 ANSI lumens.
    3,000 vs 2,200
  • 10 degrees more vertical correction
    This projector offers more vertical keystone correction than the average projector (40 degrees vs 30 degrees). The average projector offers vertical keystone correction of 30 degrees.
    40 degrees vs 30 degrees
  • Includes stereo speakers
    This projector has stereo speakers, while the average projector does not. 47.8% of projectors have stereo speakers.
  • 0.18 inch larger DMD chip
    This projector has a higher DMD chip size than the average projector (0.7 inch vs 0.47 inch). The average projector has 0.47 inch of DMD chip size.
    0.65 inch vs 0.47 inch
  • 1 more audio input ports
    This projector has more audio input ports than the average projector (1 vs 0). The average projector has 0 audio input ports.
    1 vs 0
  • 17.6% higher review score
    Reviews score
    8.7/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    ▼
    <55-66-77-88-99-10
    ▲ Better than 86% of models

    80%

    8.7

    Average grade

    20%

    8.7

    Popularity

    Grades by review (15)
    8 reviews: 3 with a printed score, 5 estimated from the review. 7 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.7 vs 7.4
  • 0.24 m shorter throw distance
    This projector has a lower throw distance than the average projector (0.8 m vs 1 m). The average projector has 1.0055 m of throw distance.
    0.762 m vs 1.0055 m
  • 1 more USB ports
    This projector has more USB ports than the average projector (2 vs 1). The average projector has 1 USB ports.
    2 vs 1
  • 17.6% higher review score
    Reviews score
    8.7/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
    Share: Reviews count 25% of the overall score.
    Score distribution
    ▼
    <55-66-77-88-99-10
    ▲ Better than 86% of models

    80%

    8.7

    Average grade

    20%

    8.7

    Popularity

    Grades by review (15)
    8 reviews: 3 with a printed score, 5 estimated from the review. 7 video reviews, each counting half as much as a written test. Reviews count 25% of the overall score.
    User ratings collected online are not part of this score.
    8.7 vs 7.4
  • 28.0% higher sentiment score
    9.6 vs 7.5
  • 36.4% brighter image
    This projector has higher ANSI lumens than the average projector (3,000 vs 2,200). The average projector has 2,200 ANSI lumens.
    3,000 vs 2,200
  • 0.18 inch larger DMD chip
    This projector has a higher DMD chip size than the average projector (0.7 inch vs 0.47 inch). The average projector has 0.47 inch of DMD chip size.
    0.65 inch vs 0.47 inch
  • 10 degrees more vertical correction
    This projector offers more vertical keystone correction than the average projector (40 degrees vs 30 degrees). The average projector offers vertical keystone correction of 30 degrees.
    40 degrees vs 30 degrees
  • 0.24 m shorter throw distance
    This projector has a lower throw distance than the average projector (0.8 m vs 1 m). The average projector has 1.0055 m of throw distance.
    0.762 m vs 1.0055 m
  • 50 inch larger image size
    This projector has a higher projection size than the average projector (300 inch vs 250 inch). The average projector has 250 inch of projection size.
    300 inch vs 250 inch
  • 10.33 ms lower input lag
    This projector has a lower input lag than the average projector (16.7 ms vs 27 ms). The average projector has 27 ms of input lag.
    In 1080P.
    16.67 ms vs 27 ms
  • 1 more USB ports
    This projector has more USB ports than the average projector (2 vs 1). The average projector has 1 USB ports.
    2 vs 1
  • VGA input included
    This projector supports VGA input, while the average projector does not. 44.1% of projectors support VGA input.
  • Includes stereo speakers
    This projector has stereo speakers, while the average projector does not. 47.8% of projectors have stereo speakers.
  • 1 more audio input ports
    This projector has more audio input ports than the average projector (1 vs 0). The average projector has 0 audio input ports.
    1 vs 0
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (1080p/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    1080p/60Hz vs 4K/120Hz
  • Basic light source
    This projector has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
    lamp vs laser
  • No HDR10 support
    This projector does not support HDR10, while the average projector does. 57.6% of projectors support HDR10.
  • 19.7% lower list score
    List score
    6.1/ 10
    ✕
    What it is
    How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
    How we count it
    Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
    Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
    Lists with this model (1)
    List score: in 1 of 108 lists (1%)
    6.1 vs 7.6
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • No Bluetooth connectivity
    This projector does not support Bluetooth, while the average projector does. 50.6% of projectors offer this.
  • Older HDMI version
    This projector has Old HDMI standard than the average projector (1.4 vs 2). The average projector supports HDMI 2.
    1.4 vs 2
  • 19.7% lower list score
    List score
    6.1/ 10
    ✕
    What it is
    How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
    How we count it
    Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 30% of the overall score.
    Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
    Lists with this model (1)
    List score: in 1 of 108 lists (1%)
    6.1 vs 7.6
  • No HDR10 support
    This projector does not support HDR10, while the average projector does. 57.6% of projectors support HDR10.
  • 29.4% lower refresh rate
    This projector has a lower refresh rate than the average projector (60 Hz vs 85 Hz). The average projector has 85 Hz of refresh rate.
    60 Hz vs 85 Hz
  • Narrower color gamut
    This projector has a lower color gamut coverage than the average projector (92% Rec.709 % vs 99% Rec.709 %). The average projector has 99% Rec.709 % of color gamut coverage.
    92% Rec.709 % vs 99% Rec.709 %
  • 4 earlier release
    This projector was released earlier than the average projector (2017 vs 2021). The average projector was released in 2021.
    November 2017
    2017 vs 2021
  • 0.1 2x narrower zoom range
    This projector has a lower zoom ratio than the average projector (1.2 vs 1.3). The average projector has 1.3 of zoom ratio.
    1.2 vs 1.3
  • Limited HDMI format
    This projector supports a less capable max HDMI input format than the average projector (1080p/60Hz vs 4K/120Hz). The average projector supports a max HDMI input format of 4K/120Hz.
    1080p/60Hz vs 4K/120Hz
  • 43.3% lower HDMI bandwidth
    This projector has a lower HDMI bandwidth than the average projector (10.2 Gbps vs 18 Gbps). The average projector has 18 Gbps of HDMI bandwidth.
    10.2 Gbps vs 18 Gbps
  • Older HDMI version
    This projector has Old HDMI standard than the average projector (1.4 vs 2). The average projector supports HDMI 2.
    1.4 vs 2
  • More outdated HDCP support
    This projector supports an older HDCP version than the average projector (1.4 vs 2.2).
    1.4 vs 2.2
  • No Wi-Fi connectivity
    This projector does not connect to Wi-Fi networks, while the average projector does. 53.4% of projectors offer this.
  • No Bluetooth connectivity
    This projector does not support Bluetooth, while the average projector does. 50.6% of projectors offer this.
  • No sleep timer
    This projector does not have a sleep timer, while the average projector does. 82.4% of projectors have one.
  • 50% weaker audio output
    This projector has a lower audio output power than the average projector (5 W vs 10 W). The average projector has 10 W of audio output power.
    5 W vs 10 W
  • Basic light source
    This projector has Basic light source than the average projector (lamp vs laser). The average projector uses a laser light source.
    lamp vs laser
  • 16,000 hours shorter lamp life
    This projector has a lower lamp life than the average projector (4,000 hours vs 20,000 hours). The average projector has 20,000 hours of lamp life.
    4,000 hours vs 20,000 hours
  • 2 dB louder operation
    This projector has a higher audible noise than the average projector (33 dB vs 31 dB). The average projector has 31 dB of audible noise.
    33 dB vs 31 dB
  • 90 W higher power use
    This projector uses more power than the average projector (320 W vs 230 W). The average projector uses 230 W of power.
    320 W vs 230 W
  • 1 dB louder eco mode
    This projector has a higher audible noise in eco mode than the average projector (29 dB vs 28 dB). The average projector has 28 dB of audible noise in eco mode.
    29 dB vs 28 dB

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

8.0
Technotin
≈ estimated
19/02/2023
Unboxing and hands-on test · sound, fan and screen size
Verdict
BenQ TH671ST is recommended for gamers who don't mind fan noise, though its resolution is only Full HD.
9.0
JoelsterG4K
≈ estimated
16/12/2017
Hands-on gaming test · input lag, sound and daytime view
Verdict
BenQ TH671ST is very responsive for console gaming and bright in daytime, though its built-in sound benefits from a separate speaker.
9.0
MindSeed TV
≈ estimated
02/12/2017
Hands-on review · gaming latency, picture and speaker tests
Verdict
BenQ TH671ST is a strong gaming projector for small rooms, with an excellent picture and no lag, though it lacks smart features.
9.0
all things tech
≈ estimated
07/08/2019
Hands-on review · daylight, gaming and movie tests
Verdict
BenQ TH671ST is a capable all-rounder and good value, though it is not a 4K projector.
9.0
JoelsterG4K
≈ estimated
05/01/2019
Short re-review · gaming and 3D movie impressions
Verdict
BenQ TH671ST delivers a sharp, bright picture with no noticeable input lag and a fun big-screen experience.
9.0
Raymond Strazdas
≈ estimated
19/01/2018
Hands-on review · gaming use, picture and built-in speaker
Verdict
BenQ TH671ST is a premium gaming projector with a crisp picture, worth considering despite its high price.
9.0
Chris Majestic
≈ estimated
22/12/2017
Hands-on review · gaming, brightness and fan noise
Verdict
BenQ TH671ST is recommended for gamers and small rooms, with bright, low-lag performance despite fan noise.
9.0
JoelsterG4K
≈ estimated
20/12/2017
Hands-on review · gaming, movies and setup
Verdict
BenQ TH671ST delivers strong contrast, colours and gaming performance, though a 4K HDR model would have been nicer.
Overview video
Hands-on video, no verdict
Not graded yet

Expert reviews

In-depth analysis and verdict from leading tech publications

5.9
rtings.com
✓ explicit
23/02/2024
Lab test · Short-throw projector
Verdict
The BenQ TH671ST is a short-throw projector for small rooms with accurate color and responsive gaming, but it works best in the dark and tops out at 1080p 60Hz.
9.0
projectorcentral.com
✓ explicit
21/01/2019
Lab review · Home theater projector
Verdict
The BenQ TH671ST is a short-throw projector for small rooms, with good contrast and a speaker that fills a family room, though fan noise and rainbow flashes are noticeable.
9.0
gamingnexus.com
✓ explicit
27/05/2019
Hands-on review · Gaming and sport
Verdict
The BenQ TH671ST is a strong choice for gaming and sport, with a clean picture on a 92-inch screen, though its speaker is only for quick use.
9.0
gstylemag.com
≈ estimated
11/04/2019
Hands-on test · Console gaming
Verdict
The BenQ TH671ST turns a bare wall into a 100-inch gaming screen, best for evening play with the blinds closed.
9.5
hometheaterhifi.com
≈ estimated
29/01/2018
Full review · Gaming and movies
Verdict
The BenQ TH671ST is a small, light projector with accurate color out of the box and low lag, suited to gaming and movies in a dim room.
9.0
windowscentral.com
≈ estimated
06/11/2019
Two-week test · Gaming and movies
Verdict
The BenQ TH671ST can replace a large TV, with a vivid 100-inch picture and low lag for consoles and casual PC games, though not for fast competitive shooters.
9.0
gagadget.com
≈ estimated
04/05/2025
Multi-week test · Gaming and films
Verdict
The BenQ TH671ST is a compact, bright projector that casts 100 inches from 1.5 m, good for gaming, though its missing USB-C port and small speaker hold it back.
9.0
gagadget.es
≈ estimated
27/08/2024
Multi-week test · Gaming and cinema
Verdict
The BenQ TH671ST is a sturdy, bright projector that throws 100 inches from 1.5 m and suits gaming, but the fan and speaker let it down.

Third-party reviews

What customers like about BenQ TH671ST

  • Low input lag (approx. 16.67ms) makes it excellent for casual console and PC gaming.
  • Short-throw lens allows for a 100-inch image from just 1.5 metres (5 feet) away, ideal for small rooms.
  • High out-of-the-box color accuracy (Rec. 709) rarely requires professional calibration.
  • Bright 3,000 ANSI lumens output allows for viewing in moderately lit rooms.
  • Compact and lightweight design is suitable for portable use or moving between rooms.
  • Auto-vertical keystone and LumiExpert light sensor simplify setup and viewing comfort.

What customers don't like about BenQ TH671ST

  • No support for 4K resolution or HDR content.
  • Lack of horizontal keystone correction means the projector must be placed directly in front of the screen center.
  • Limited to a 60Hz refresh rate, which may not satisfy competitive gamers seeking 120Hz or higher.
  • Contrast can struggle in dark scenes, and some visible vignetting (gray borders) may appear on white screens.
  • Onboard 5W speaker is functional for travel but lacks the depth needed for a full home theater experience.
  • Dated connectivity options, missing modern ports like USB-C.

Verdict

The BenQ TH671ST is a native 1080p Full HD DLP short-throw projector designed for gaming and home entertainment, capable of projecting a massive 100-inch image from just 1.5 metres (approximately 5 feet) away. It delivers a bright 3,000 ANSI lumens output and a 10,000:1 contrast ratio, featuring an ultra-fast 16.67ms input lag that ensures responsive, smooth gameplay. Main pros include its impressive 92% Rec.709 colour accuracy, a convenient 1.2x zoom lens for flexible placement, and the LumiExpert auto light sensor that adjusts brightness based on ambient room light. However, it lacks HDR support and 4K compatibility, the internal 5W mono speaker lacks significant bass, and fan noise can become noticeable during quiet scenes at higher brightness settings.

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