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PROJECTORS · YOUR NEXT FACE-OFF

BenQ TH671ST vs BenQ TH685i

Real specs. Clear sources.Exact models · UK & US buying links

Compared products

YOUR FIRST CHOICE

BenQ TH671ST

th671st · exact TH671ST UK manufacturer catalogue configuration

BenQ TH671ST — exact-model official product image.
Exact model & source notes

BenQ TH671ST in its exact UK manufacturer catalogue configuration. Compare the declared projected image, actual light-source and brightness basis, optical placement and source-listed inputs together.

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications
WHAT DIFFERS
Brightness3000 ANSI lumens3500 ANSI lumens
Throw ratio0.69~0.831.127~1.46
Dimensions296 x 120 x 224 mm312 x 110 x 225 mm
3 of 27 verified differences, in the order listed below. Not a rating.
See the 27 verified differences
THE CONTENDER

BenQ TH685i

TH685i · exact TH685i UK manufacturer catalogue configuration

BenQ TH685i — exact-model official product image.
Exact model & source notes

BenQ TH685i in its exact UK manufacturer catalogue configuration. Compare the declared projected image, actual light-source and brightness basis, optical placement and source-listed inputs together.

Specifications checked 17 Oct 2026.

Amazon links open search results. Check the exact variant, current price and availability with the retailer.

Manufacturer specifications

TH671ST UK & US retailers

UK & US price history: no verified listing yet

TH685i UK & US retailers

UK & US price history: no verified listing yet

Search links open retailer results, not a matched listing; eBay listings are checked daily. As an Amazon Associate I earn from qualifying purchases. As an eBay Partner, we may be compensated if you make a purchase.

THE DIFFERENCES, MADE VISIBLE

Visual facts

Differences first. Select a topic for its graphic, sources and conditions.

How to read this comparison
  • Manufacturer facts for the exact models shown. Not a quality rating or a test result.
  • “Different” means the known values differ, not that one is better.
  • Missing or conflicting evidence is marked and never counts as a difference. Source chips hold each fact’s sources and conditions.
SPECIFICATIONS SIDE BY SIDE7 topics
SELECTED TOPIC
01 / 07

Brightness

Check the exact configuration and source conditions for your use.

BenQ TH671ST3000 ANSI lumens

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

BenQ TH685i3500 ANSI lumens

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

Explore the full specifications

Match the screen, lens and room. Check the stated throw ratio, lens setup and connections. ANSI, ISO, LED and centre-lumen claims keep their different measurement bases; they are not an overall picture-quality score. A projected 4K claim does not by itself identify the physical imager pixel grid. Accepted input modes remain separate.

WHAT CHANGES BETWEEN THEM?

Key differences

Full specifications ↓

27 verified differences, most decision-relevant first. 6 are also drawn in Visual facts above. Missing information stays separate.

Brightness

In Visual facts
BenQ TH671ST3000 ANSI lumens
BenQ TH685i3500 ANSI lumens
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Connections

In Visual facts
BenQ TH671ST1 × PC in (D-sub 15pin); 1 × Monitor out (D-sub 15pin); (x2), HDMI-1 (1.4a), HDMI-2 (1.4a/HDCP1.4/MHL) (HDMI in); (x1), USB Type A-1 (2.0/Power Supply1.0A) (USB Type A); (x1), USB Type Mini B-1(service) (USB Type Mini B); 1 × RS232 in (DB-9pin); 1 × Audio in (3.5mm Mini Jack); 1 × Audio out (3.5mm Mini Jack)
BenQ TH685iPC in (D-sub 15pin) ((x1), PC in-1 (shared with component video)); (x2), HDMI-1 (2.0b/HDCP2.2), HDMI-Internal (2.0b/HDCP2.2) (HDMI in); (x1), USB Type A-1 (2.0/Power Supply1.5A) (USB Type A); 1 × RS232 in (DB-9pin); 1 × Audio in (3.5mm Mini Jack); 1 × Audio out (3.5mm Mini Jack)
Sources
BenQ TH671ST

Manufacturer specification · Source-listed physical inputs, outputs and controls. Service USB, power outputs, connector versions and eARC claims retain their separate scopes; no full-bandwidth or compatibility guarantee inferred. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: PC in (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Monitor out (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: HDMI in. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type A. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type Mini B. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: RS232 in (DB-9pin). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio in (3.5mm Mini Jack). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio out (3.5mm Mini Jack).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Source-listed physical inputs, outputs and controls. Service USB, power outputs, connector versions and eARC claims retain their separate scopes; no full-bandwidth or compatibility guarantee inferred. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: PC in (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: HDMI in. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type A. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: RS232 in (DB-9pin). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio in (3.5mm Mini Jack). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio out (3.5mm Mini Jack).

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Dimensions

In Visual facts
BenQ TH671ST296 x 120 x 224 mm
BenQ TH685i312 x 110 x 225 mm
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer axes, original measurement units and foot/handle/configuration basis remain literal. Packaging dimensions are separate. Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Dimensions (WxHxD) (mm).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer axes, original measurement units and foot/handle/configuration basis remain literal. Packaging dimensions are separate. Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Dimensions (WxHxD) (mm).

BenQ TH685i — official UK technical specifications

A size or weight trade-off; it does not establish the better product.

Published ANSI brightness

In Visual facts
BenQ TH671ST3000 ANSI lm
BenQ TH685i3500 ANSI lm
Sources
BenQ TH671ST

Manufacturer specification · Actual source field Brightness (ANSI lumens): 3000. Manufacturer measurement/mode qualifications remain in the full specifications; no cross-method conversion.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Actual source field Brightness (ANSI lumens): 3500. Manufacturer measurement/mode qualifications remain in the full specifications; no cross-method conversion.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Quick Start Guide

BenQ TH671ST(x1) 18L
BenQ TH685i(x1) 21L
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Show 21 more verified differences

Remote Control w/ Battery

BenQ TH671STRCV013
BenQ TH685iRCI067
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Manufacturer claims for the stated mode and equipment. Read each test condition; this is not measured everyday battery life.

Speaker

BenQ TH671ST(x1), 5W
BenQ TH685i(x1), 5W Chamber
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Input Lag

BenQ TH671ST16.7 ms (1080P 60Hz)
BenQ TH685i16.7 ms (1080P 60Hz), 33.4 ms (4K 60Hz) *downscaling to 1080p, 8.3 ms (1080P 120Hz)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Resolution Support

BenQ TH671STVGA(640 x 480) to WUXGA_RB(1920 x 1200) *RB=Reduced blanking
BenQ TH685iVGA (640 x 480) to 4K UHD (3840 x 2160)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Dimensions (WxHxD) (mm)

BenQ TH671ST296 x 120 x 224
BenQ TH685i312 x 110 x 225
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

A size or weight trade-off; it does not establish the better product.

Net Weight (kg)

BenQ TH671ST2.7
BenQ TH685i2.79
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

A size or weight trade-off; it does not establish the better product.

Brightness (ANSI lumens)

BenQ TH671ST3000
BenQ TH685i3500
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Light Source Life

BenQ TH671STa. Normal 4000 hrs, c. SmartEco 10000 hrs, d. LampSave 15000 hrs, b. ECO 10000 hrs
BenQ TH685ia. Normal 4000 hrs, c. SmartEco 8000 hrs, d. LampSave 15000 hrs, b. ECO 10000 hrs
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Acoustic Noise (Typ./Eco.)(dB)

BenQ TH671ST33/29
BenQ TH685i35/29 dB
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Typical Power Consumption (110V)

BenQ TH671ST320W
BenQ TH685i297W/110V
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

HDMI in

BenQ TH671ST(x2), HDMI-1 (1.4a), HDMI-2 (1.4a/HDCP1.4/MHL)
BenQ TH685i(x2), HDMI-1 (2.0b/HDCP2.2), HDMI-Internal (2.0b/HDCP2.2)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

PC in (D-sub 15pin)

BenQ TH671ST(x1)
BenQ TH685i(x1), PC in-1 (shared with component video)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

USB Type A

BenQ TH671ST(x1), USB Type A-1 (2.0/Power Supply1.0A)
BenQ TH685i(x1), USB Type A-1 (2.0/Power Supply1.5A)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Lens

BenQ TH671STF/#=2.6~2.78, f=10.2~12.24
BenQ TH685iF/#=1.94~2.07;f=11.9~15.5 mm
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Projection Offset (Full-Height)

BenQ TH671ST102.5%
BenQ TH685i105%
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

A size or weight trade-off; it does not establish the better product.

Throw Ratio

BenQ TH671ST0.69~0.83
BenQ TH685i1.127~1.46
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Zoom Ratio

BenQ TH671ST1.2x
BenQ TH685i1.3x
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Picture Modes

BenQ TH671ST3D, Bright, Cinema, Game, Sport, User 1, User 2, Vivid TV
BenQ TH685i3D, Bright, Cinema, Game, HDR, HLG, Living Room, Sports, User 1, User 2
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Rec. 709 Coverage

BenQ TH671ST92%
BenQ TH685i95%
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Maximum optical throw ratio

BenQ TH671ST0.83
BenQ TH685i1.46
Sources
BenQ TH671ST

Manufacturer specification · Exact manufacturer optical throw row: 0.69~0.83. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Exact manufacturer optical throw row: 1.127~1.46. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Minimum optical throw ratio

In Visual facts
BenQ TH671ST0.69
BenQ TH685i1.127
Sources
BenQ TH671ST

Manufacturer specification · Exact manufacturer optical throw row: 0.69~0.83. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Exact manufacturer optical throw row: 1.127~1.46. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH685i — official UK technical specifications

Check the exact configuration and source conditions for your use.

Small physical differences (1)
BenQ TH671ST2700 g
BenQ TH685i2790 g
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer Net Weight (kg): 2.7. Kilograms normalized to grams; packaging/gross mass and separately listed accessories are not substituted.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer Net Weight (kg): 2.79. Kilograms normalized to grams; packaging/gross mass and separately listed accessories are not substituted.

BenQ TH685i — official UK technical specifications

A size or weight trade-off; it does not establish the better product.

Missing or non-comparable evidence (12)

Physical imager pixel grid

BenQ TH671STNot verified
BenQ TH685iNot verified
Sources
BenQ TH671ST

A physical imager pixel grid is not separately established by these supplied sources. The declared display/projected resolution and chip diagonal do not fill this field. · Manufacturer specification

BenQ TH671ST — official UK technical specifications
BenQ TH685i

A physical imager pixel grid is not separately established by these supplied sources. The declared display/projected resolution and chip diagonal do not fill this field. · Manufacturer specification

BenQ TH685i — official UK technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

3D Glasses

BenQ TH671STDGD5, (Optional)
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Android TV dongle

BenQ TH671STNot verified
BenQ TH685iQS01, (Standard)
Sources
BenQ TH671ST

No source recorded for this side.

BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Lens cover

BenQ TH671STYes
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

User Manual CD

BenQ TH671ST1 (27L)
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

VGA(D-sub 15pin) Cable

BenQ TH671ST1 (1.5m)
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

HDMI Audio Return

BenQ TH671STNot verified
BenQ TH685iARC, 5.1 channel
Sources
BenQ TH671ST

No source recorded for this side.

BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Dimensions (WxHXD) (inch)

BenQ TH671STNot verified
BenQ TH685i12.28 x 4.3 x 8.85
Sources
BenQ TH671ST

No source recorded for this side.

BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Net Weight (lb)

BenQ TH671STNot verified
BenQ TH685i6.15
Sources
BenQ TH671ST

No source recorded for this side.

BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Monitor out (D-sub 15pin)

BenQ TH671ST(x1)
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

USB Type Mini B

BenQ TH671ST(x1), USB Type Mini B-1(service)
BenQ TH685iNot verified
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded for this side.

Evidence is missing or conflicting on at least one side. This is not a verified difference.

Keystone Adjustment

BenQ TH671ST1D, Vertical ± 40 degrees
BenQ TH685i1D, (Auto) Vertical ± 40 degrees
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications

One source states less detail or a rounded figure. This is not a verified difference; check the exact configuration.

20 shared fields have the same recorded value.

WHAT EACH CHOICE ASKS OF YOU

What it brings and what to check

BenQ TH671ST

What it brings

  • The manufacturer supplies model-specific projection, placement and connection specifications. Use the stated throw ratio, actual image size and lens configuration to plan your installation.

What to check

  • Manufacturer image and brightness claims are not an independent picture-quality test. Physical imager pixels, input limits, measurement methods, bundled TV devices and regional accessories need their own stated source scope; no overall winner or current stock is established.

BenQ TH685i

What it brings

  • The manufacturer supplies model-specific projection, placement and connection specifications. Use the stated throw ratio, actual image size and lens configuration to plan your installation.

What to check

  • Manufacturer image and brightness claims are not an independent picture-quality test. Physical imager pixels, input limits, measurement methods, bundled TV devices and regional accessories need their own stated source scope; no overall winner or current stock is established.
COMPARE THE DETAILS

Full specifications

How we verify
60 of 60 specifications Sources in each row
Source-backed specifications for BenQ TH671ST and BenQ TH685i
SpecificationBenQ TH671STBenQ TH685i
Projected resolution
Sources
BenQ TH671ST

Manufacturer specification · Source label Resolution. This is the manufacturer display/projected-image claim; it does not independently establish the physical DMD/imager pixel grid. Accepted signal resolution remains separate.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Source label Resolution. This is the manufacturer display/projected-image claim; it does not independently establish the physical DMD/imager pixel grid. Accepted signal resolution remains separate.

BenQ TH685i — official UK technical specifications
1080P (1920x1080)1080P (1920x1080)
Projection technology
Sources
BenQ TH671ST

Manufacturer specification

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification

BenQ TH685i — official UK technical specifications
DLPDLP
Resolution
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
1080P (1920x1080)1080P (1920x1080)
Native Aspect Ratio
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
16:916:9
Contrast Ratio (FOFO)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
10,000:110,000:1
Display Color
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
30-bit (1.07 billion colors)30-bit (1.07 billion colors)
Rec. 709 CoverageDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
92%95%
Picture ModesDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Picture. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
3D, Bright, Cinema, Game, Sport, User 1, User 2, Vivid TV3D, Bright, Cinema, Game, HDR, HLG, Living Room, Sports, User 1, User 2
Resolution SupportDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
VGA(640 x 480) to WUXGA_RB(1920 x 1200) *RB=Reduced blankingVGA (640 x 480) to 4K UHD (3840 x 2160)
3D Glasses
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

DGD5, (Optional)Not provided
Projection System
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Projection System. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Projection System. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
DLPDLP
Light source
Sources
BenQ TH671ST

Manufacturer specification

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification

BenQ TH685i — official UK technical specifications
LampLamp
BrightnessDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer claim. Actual published method: ANSI lumens. Centre brightness, dynamic contrast and other lumen methods remain separate; no conversion or measured performance is asserted. Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Brightness (ANSI lumens).

BenQ TH685i — official UK technical specifications
3000 ANSI lumens3500 ANSI lumens
Published ANSI brightnessDifferent
Sources
BenQ TH671ST

Manufacturer specification · Actual source field Brightness (ANSI lumens): 3000. Manufacturer measurement/mode qualifications remain in the full specifications; no cross-method conversion.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Actual source field Brightness (ANSI lumens): 3500. Manufacturer measurement/mode qualifications remain in the full specifications; no cross-method conversion.

BenQ TH685i — official UK technical specifications
3000 ANSI lm3500 ANSI lm
Brightness (ANSI lumens)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
30003500
Light Source
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
LampLamp
Light Source LifeDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Display. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
a. Normal 4000 hrs, c. SmartEco 10000 hrs, d. LampSave 15000 hrs, b. ECO 10000 hrsa. Normal 4000 hrs, c. SmartEco 8000 hrs, d. LampSave 15000 hrs, b. ECO 10000 hrs
Throw ratioDifferent
Sources
BenQ TH671ST

Manufacturer specification

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification

BenQ TH685i — official UK technical specifications
0.69~0.831.127~1.46
Minimum optical throw ratioDifferent
Sources
BenQ TH671ST

Manufacturer specification · Exact manufacturer optical throw row: 0.69~0.83. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Exact manufacturer optical throw row: 1.127~1.46. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH685i — official UK technical specifications
0.691.127
Maximum optical throw ratioDifferent
Sources
BenQ TH671ST

Manufacturer specification · Exact manufacturer optical throw row: 0.69~0.83. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Exact manufacturer optical throw row: 1.127~1.46. Applies to the listed lens/configuration; digital zoom, keystone and throw distance remain separate.

BenQ TH685i — official UK technical specifications
0.831.46
Throw RatioDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
0.69~0.831.127~1.46
Zoom RatioDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
1.2x1.3x
LensDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
F/#=2.6~2.78, f=10.2~12.24F/#=1.94~2.07;f=11.9~15.5 mm
Projection Offset (Full-Height)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
102.5%105%
Keystone Adjustment
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Optical. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
1D, Vertical ± 40 degrees1D, (Auto) Vertical ± 40 degrees
Lens cover
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

YesNot provided
Universal Ceiling Mount
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
CM00G3, (Optional)CM00G3, (Optional)
ConnectionsDifferent
Sources
BenQ TH671ST

Manufacturer specification · Source-listed physical inputs, outputs and controls. Service USB, power outputs, connector versions and eARC claims retain their separate scopes; no full-bandwidth or compatibility guarantee inferred. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: PC in (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Monitor out (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: HDMI in. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type A. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type Mini B. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: RS232 in (DB-9pin). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio in (3.5mm Mini Jack). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio out (3.5mm Mini Jack).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Source-listed physical inputs, outputs and controls. Service USB, power outputs, connector versions and eARC claims retain their separate scopes; no full-bandwidth or compatibility guarantee inferred. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: PC in (D-sub 15pin). Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: HDMI in. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: USB Type A. Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: RS232 in (DB-9pin). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio in (3.5mm Mini Jack). Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Audio out (3.5mm Mini Jack).

BenQ TH685i — official UK technical specifications
1 × PC in (D-sub 15pin); 1 × Monitor out (D-sub 15pin); (x2), HDMI-1 (1.4a), HDMI-2 (1.4a/HDCP1.4/MHL) (HDMI in); (x1), USB Type A-1 (2.0/Power Supply1.0A) (USB Type A); (x1), USB Type Mini B-1(service) (USB Type Mini B); 1 × RS232 in (DB-9pin); 1 × Audio in (3.5mm Mini Jack); 1 × Audio out (3.5mm Mini Jack)PC in (D-sub 15pin) ((x1), PC in-1 (shared with component video)); (x2), HDMI-1 (2.0b/HDCP2.2), HDMI-Internal (2.0b/HDCP2.2) (HDMI in); (x1), USB Type A-1 (2.0/Power Supply1.5A) (USB Type A); 1 × RS232 in (DB-9pin); 1 × Audio in (3.5mm Mini Jack); 1 × Audio out (3.5mm Mini Jack)
Input LagDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
16.7 ms (1080P 60Hz)16.7 ms (1080P 60Hz), 33.4 ms (4K 60Hz) *downscaling to 1080p, 8.3 ms (1080P 120Hz)
Horizontal Frequency
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Compatibility. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
15K~102KHz15K~102KHz
PC in (D-sub 15pin)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1)(x1), PC in-1 (shared with component video)
Monitor out (D-sub 15pin)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

(x1)Not provided
HDMI inDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x2), HDMI-1 (1.4a), HDMI-2 (1.4a/HDCP1.4/MHL)(x2), HDMI-1 (2.0b/HDCP2.2), HDMI-Internal (2.0b/HDCP2.2)
USB Type ADifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1), USB Type A-1 (2.0/Power Supply1.0A)(x1), USB Type A-1 (2.0/Power Supply1.5A)
USB Type Mini B
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

(x1), USB Type Mini B-1(service)Not provided
RS232 in (DB-9pin)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section I/O Interface. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1)(x1)
Audio in (3.5mm Mini Jack)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1)(x1)
Audio out (3.5mm Mini Jack)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1)(x1)
VGA(D-sub 15pin) Cable
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

1 (1.5m)Not provided
HDMI Audio Return
Sources
BenQ TH671ST

No source recorded.

BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
Not providedARC, 5.1 channel
SpeakerDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Audio. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1), 5W(x1), 5W Chamber
Carry Bag
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
5J.J3T09.001, (Optional)5J.J3T09.001, (Optional)
Power Cord (by region)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
x1 (1.8M)x1 (1.8M)
User Manual CD
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

No source recorded.

1 (27L)Not provided
Quick Start GuideDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
(x1) 18L(x1) 21L
Warranty Card (by region)
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
YesYes
Android TV dongle
Sources
BenQ TH671ST

No source recorded.

BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
Not providedQS01, (Standard)
DimensionsDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer axes, original measurement units and foot/handle/configuration basis remain literal. Packaging dimensions are separate. Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Dimensions (WxHxD) (mm).

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer axes, original measurement units and foot/handle/configuration basis remain literal. Packaging dimensions are separate. Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected. Source field: Dimensions (WxHxD) (mm).

BenQ TH685i — official UK technical specifications
296 x 120 x 224 mm312 x 110 x 225 mm
WeightDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer Net Weight (kg): 2.7. Kilograms normalized to grams; packaging/gross mass and separately listed accessories are not substituted.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer Net Weight (kg): 2.79. Kilograms normalized to grams; packaging/gross mass and separately listed accessories are not substituted.

BenQ TH685i — official UK technical specifications
2700 g2790 g
Dimensions (WxHxD) (mm)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
296 x 120 x 224312 x 110 x 225
Net Weight (kg)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
2.72.79
Dimensions (WxHXD) (inch)
Sources
BenQ TH671ST

No source recorded.

BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
Not provided12.28 x 4.3 x 8.85
Net Weight (lb)
Sources
BenQ TH671ST

No source recorded.

BenQ TH685i

Manufacturer specification · Manufacturer section Dimension & Weight. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
Not provided6.15
Operating Temperature
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
0~40℃0~40℃
Power Supply
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
AC 100 to 240 V, 50/60 HzAC 100 to 240 V, 50/60 Hz
Typical Power Consumption (110V)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
320W297W/110V
Stand-by Power Consumption
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
<0.5W<0.5W
Acoustic Noise (Typ./Eco.)(dB)Different
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Environment. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
33/2935/29 dB
Remote Control w/ BatteryDifferent
Sources
BenQ TH671ST

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH671ST — official UK technical specifications
BenQ TH685i

Manufacturer specification · Manufacturer section Accessories. Original units, optical/digital basis, input modes, test qualifications and regional accessory scope retained. No apparent source error is silently corrected.

BenQ TH685i — official UK technical specifications
RCV013RCI067
Show unverified (1)Not verified, not provided or conflicting for both products. Kept for completeness; never counted as a difference.
Specifications without verified values for either product
Physical imager pixel grid
Sources
BenQ TH671ST

A physical imager pixel grid is not separately established by these supplied sources. The declared display/projected resolution and chip diagonal do not fill this field. · Manufacturer specification

BenQ TH671ST — official UK technical specifications
BenQ TH685i

A physical imager pixel grid is not separately established by these supplied sources. The declared display/projected resolution and chip diagonal do not fill this field. · Manufacturer specification

BenQ TH685i — official UK technical specifications
Not listed by the manufacturerNot listed by the manufacturer
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