ProjectorDB

BenQ TH685i vs ViewSonic PX748-4K

BenQ TH685i is $200 cheaper. ViewSonic PX748-4K is brighter, better for gaming and quieter.

BenQ TH685iMSRP $899
ViewSonic PX748-4KMSRP $1,099
Key differences
White light outputANSI
3,500 lm ANSI4,000 lm ANSI
Native resolution
1080p (1920 × 1080)—
Throw ratio
1.13–1.46:11.13–1.47:1
Lowest input lag
8.3 msDerived4.2 msDerived
Fan noise
Normal 35 dB(A) · Eco 29 dB(A)Normal 33 dB(A) · Eco 28 dB(A)
MSRP
$899$1,099
Room fit
Distance to screen
2.5–3.2 m2.5–3.3 m
Picture
White light outputANSI
3,500 lm ANSI4,000 lm ANSI
Imaging technology
DLPDLP
Chip / panel diagonal
0.48 in—
Native resolution
1080p (1920 × 1080)—
Native aspect
16:9Derived16:9Derived
Addressable resolution
—4K UHD (3840 × 2160)
Colour wheel segments
6—
Colour wheel speed
2×—
Dynamic contrast
10,000:112,000:1
Colour gamut
Rec. 709 95% coverage—
Colour bit depth (per channel)
10 bit10 bit
Gamma / EOTF presets
2.2, 2.4, 2.6—
Colour temperature presets
Native, Custom—
HDR formats
HDR10, HLGHDR10, HLG
Colour management (CMS)
6-axis—
Picture mode memories
22
3D
Yes—
3D formats
Frame packing, Side-by-side, Top-bottom, Frame sequential—
Light source
Light source
LampLamp
Lamp power
245 W240 W
Replacement lamp
5J.JL805.001RLC-127
Light-source life
4,000 h normal · 10,000 h eco · 15,000 h super eco · 8,000 h dynamic4,000 h normal · 20,000 h dynamic
Warm-up time
About 30 s—
Optics
Throw ratio
1.13–1.46:11.13–1.47:1
Image size
30–300 in30–300 in
Projection offset
105%—
Zoom
OpticalOptical
Zoom ratio
1.3×Derived1.3×Derived
Focal length
11.9–15.5 mm—
Aperture (f-number)
1.94–2.07—
Focus
ManualManual
Vertical lens shift
±5%—
Vertical keystone
40°40°
Horizontal keystone
—40°
Auto keystone
YesYes
Corner correction
—4-corner
Grid warp
—Yes
Interchangeable lens
—No
Motion & gaming
Max input refresh
1080p: 240 Hz · 4K UHD: 60 Hz1080p: 240 Hz · 4K UHD: 60 Hz
Input lag
1080p: 60 Hz 16.7 ms · 120 Hz 8.3 ms · 4K UHD: 60 Hz 33.4 ms1080p: 240 Hz 4.2 ms
Inputs & control
HDMI inputs
HDMI 2.0 (ARC, HDCP 2.2) · HDMI 2.0 (HDCP 2.2, internal)2 × HDMI 2.0 (HDCP 2.2)
Other video inputs
VGA, Component—
Max input resolution
4K UHD4K UHD
Audio inputs
3.5 mm—
Control ports
RS-232RS-232, 12 V trigger
Horizontal scan
15–102 kHz15–129 kHz
Vertical scan
23–120 Hz23–240 Hz
Smart platform
Wi-Fi
Wi-Fi 5—
Bluetooth
4.2—
Ethernet
—Yes
Smart platform
Android TV—
OS version
9—
Google-certified
Yes—
Chipset
Amlogic S905Y2—
RAM
2 GB—
Storage
16 GB—
Security updates until
31 Dec 2024—
Netflix
No—
Casting
Chromecast built-in—
Audio
Speaker power
5 W10 W
Speakers
11
Layout
MonoMono
Audio outputs
3.5 mm, HDMI ARC3.5 mm
HDMI audio return
ARCDerivedNoneDerived
Physical & installation
Dimensions (W × D × H)
312 × 225 × 110 mm312 × 222 × 108 mm
Weight
2,790 g2,800 g
Colours
White—
Orientations
Table, Ceiling, RearTable, Ceiling, Rear
Ceiling mount
M4M4, screws ≤ 8 mm
Environment & power
Operating temperature
0–40°C0–40°C
Operating humidity
10–90%RH0–90%RH
Altitude
3,000 m · high-altitude mode3,000 m · high-altitude mode
Power draw
Max 340 W · Normal 297 W · Eco 206 W310 W
Standby
Up to 0.5 WUp to 0.5 W
Mains input
100–240 V · 50/60 Hz100–240 V · 50/60 Hz
Fan noise
Normal 35 dB(A) · Eco 29 dB(A)Normal 33 dB(A) · Eco 28 dB(A)
Safety & support
Risk group
RG2RG2
Marks
—FCC
Warranty
3 yr (light source 1 yr or 2,000 h)3 yr (light source 1 yr)
User manual
https://esupportdownload.benq.com/esupport/PROJECTOR/UserManual/TH685i/TH685i_UM_EN_210913182301.pdfhttps://www.viewsonicglobal.com/public/products_download/user_guide/Projector/PX701-4K_PX728-4K_PX748-4K/PX701-4K_PX728-4K_PX748-4K_UG_ENG.pdf
Spare parts
Lamp 5J.JL805.001—
In the box
In the box
Power cord, Remote, Remote batteries, Quick start guide, Warranty card, VGA cable, Streaming donglePower cord, Remote, Quick start guide, USB cable
Remote
IR · voiceIR