BenQ TH575i vs Optoma HD146X

Bold marks the better figure where both are stated to the same standard. “—” means the manufacturer doesn't state it.

	BenQ TH575i MSRP $649	Optoma HD146X
Display system
Imaging technology	DLP	DLP
Technology brand	—	DLP
Number of imaging devices	1	—
Chip / panel diagonal	—	0.47 in
Native aspect ratio	16:9	16:9
Native resolution	1920 × 1080	1920 × 1080
Colour wheel segments	—	RYGCWB
Optics
Throw ratio	1.49–1.64:1	1.47–1.62:1
Projection distance table	30″: 0.99–1.09 m · 40″: 1.32–1.45 m · 50″: 1.65–1.82 m · 60″: 1.98–2.18 m · 80″: 2.64–2.91 m · 100″: 3.3–3.63 m · 120″: 3.96–4.36 m · 150″: 4.95–5.45 m · 200″: 6.6–7.26 m · 250″: 8.25–9.08 m · 300″: 9.9–10.89 m	40″: 1.3–1.4 m · 50″: 1.6–1.8 m · 60″: 2–2.2 m · 70″: 2.3–2.5 m · 80″: 2.6–2.9 m · 90″: 2.9–3.2 m · 100″: 3.3–3.6 m · 120″: 3.9–4.3 m · 150″: 4.9–5.4 m · 200″: 6.5–7.2 m · 250″: 8.1–9 m · 280″: 9.1–10 m
Zoom type	Optical	Optical
Zoom ratio	1.1×	1.1×
Focus	Manual	Manual
Fixed offset	108%	116%
Focal length	22–24.1 mm	15.59–17.14 mm
F-number	2.56–2.68	2.1–2.31
Image size range	30–300 in	28–301 in
Vertical keystone	-40–40°	-40–40°
Light source
Light source type	Lamp	Lamp
Lamp wattage	203 W	240 W
Light source life	Normal: 6,000 h · Smarteco: 10,000 h · Lampsave: 15,000 h · Eco: 10,000 h	Bright: 4,000 h · Dynamic: 15,000 h · Eco: 10,000 h
Life definition	—	Unspecified
Warm-up time	30 s	—
Cool-down time	90 s	—
Light-source dimming	—	Dynamic frame
Brightness
ANSI lumens	3,800 lm	3,600 lm
Brightness uniformity (centre-to-corner)	—	80%
Contrast & black level
Dynamic contrast	15,000:1	25,000:1
Colour
Rec.709 gamut	88%	—
Gamut metric	Coverage	—
Colour temperature presets	Native	—
Gamma / EOTF presets	2.2, 2.4, 2.6	2.2, 2.4
Bit depth / 'number of colours'	30 bit	30 bit
Calibration & picture control
Colour management system	6-axis	6-axis
ISF certified	—	Yes
Picture mode memories	2	—
Motion & gaming
Input lag (rated)	1920×1080 @ 60 Hz: 16.7 ms	1920×1080 @ 60 Hz: 16 ms
Audio
Speaker power	10 W	3 W
Speaker count	1	1
Audio channels	Mono	—
Audio outputs	3.5 mm	3.5 mm
Inputs, control & connectivity
Max input signal	1920 × 1200	1920 × 1200
HDMI port count	1	1
HDMI ports (feature-level)	HDMI-1: HDMI 1.4a, HDCP 1.4	HDMI: HDMI 1.4a
Horizontal scan frequency	15–102 kHz	15.38–91.15 kHz
Vertical scan frequency	24–120 Hz	24–85 Hz
RS-232	Yes	—
Firmware / software
Smart OS	Google TV	—
Netflix	Via dongle	—
3D
3D support	Yes	Yes
3D sync method	—	DLP-Link
3D formats	Top-bottom, Frame sequential, Frame packing, Side-by-side	Frame packing, Side-by-side, Top-bottom
Glasses included	—	0
Setup automation
Auto keystone	Yes	—
Acoustic noise
Fan noise (sound pressure)	Typical: 34 dB(A) · Eco: 29 dB(A)	Min: 26 dB(A) · Max: 28 dB(A)
Environment & power
Operating temperature	0–40°C	5–40°C
Operating humidity	10–90%RH	10–85%RH
Altitude / high-altitude mode	3,000 m	3,000 m
High-altitude mode	Yes	Yes
Operating orientations	Table, Ceiling, Rear	Table, Ceiling, Rear
Rated voltage	100–240 V	100–240 V
Rated frequency	50–60 Hz	50–60 Hz
Power consumption (max)	295 W	325 W
Power consumption by mode	Typical 110v: 295 W	Typical bright: 295 W · Max bright: 325 W · Typical eco: 215 W · Max eco: 240 W
Standby power	0.5 W	0.5 W
Physical & installation
Width	296 mm	316 mm
Depth	237 mm	244 mm
Height	120 mm	109 mm
Weight	2.3 kg	2.8 kg
Mount hole pattern	Thread: M4 · Depth mm: 8	Thread: M4
Safety & compliance
Photobiological risk group	RG2	RG2
Safety & market certifications	—	FCC, CE
Support & ownership
Warranty	🇺🇸 US 3 yr	🇺🇸 US 1 yr
Light-source warranty	Pre-installed lamps on new units: 2,000 hours or one year from purchase, whichever comes first (US).	90 days
User manual	https://www.benq.com/en-us/support/downloads-faq/products/projector/th575i/manual.html	—
In the box
Box contents	Remote, Batteries, Power cord, Quick start guide, Warranty card, Streaming dongle	Projector, Power cord, Remote, Batteries, Quick start guide
Remote type	—	IR