BenQ TH671ST vs TH685i vs TH575: Which 1080p Gaming Projector Offers the Best Performance?

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Introduce​

Parameter	BenQ TH671ST​	BenQ TH685i​	BenQ TH575​
Picture​	​	​	​
Price​	$799.99​	$799​	$599​
Recommended Uses​	Gaming​	Gaming​	Education, Home Cinema, Gaming, Business​
Highlight​	Vertical Keystone Correction: Yes Built-in Speaker: Yes HDMI Ports: 2 Resolution: Full HD 1080p Brightness: 3000 ANSI lumen Throw Distance: Short throw (100 Inch at 1.5 m) Wall Color Mode: Yes​	Resolution: 1080P, 4K supported Brightness: 3500 ANSI lumens Image Size: 100 inches from 8.2 feet (2.5m) Color Accuracy: 95% Rec. 709 Gaming Features: 8.3ms latency at 1080p/120Hz, Game Mode, Game Sound Mode, LumiExpert Console Compatibility: PS4, PS5, Nintendo Switch, Xbox One X, Google Stadia Entertainment Options: Google-certified Android TV, 5,000+ apps User Features: Airplay and Chromecast support, remote control for Android TV and projector​	Model: New 2023 Brightness: 3800 ANSI Lumens Contrast Ratio: 15,000:1 Resolution: 1080p Full HD Input Lag: 16ms (1080p@60Hz) Response Time: Microsecond DMD Projection Distance: 10.8ft for 100" image Use Case: Gaming projector​

Side-by-Side Comparison​

Display​

Parameter	BenQ TH671ST​	BenQ TH685i​	BenQ TH575​
Screen Size​	100 Inches - 300 Inches​	30 Inches - 300 Inches​	30 Inches - 300 Inches​
Throw Distance​	3 Feet - 15 Feet​	1.13 Feet - 1.46 Feet​	8 Feet - 5 Feet​
Contrast Ratio​	10000:1​	-​	15000:1​
Display Resolution​	1980 x 1080​	1920 x 1080 Pixels​	1920 x 1080 Pixels​
Native Resolution​	1920 x 1080​	1920 x 1080​	1920 x 1080​
Brightness​	3000 ANSI Lumen​	3500 Lumen​	3800 Lumen​
Display Type​	DLP​	DLP​	DLP​
Picture Quality Enhancement​	Some technology to improve image quality​	-​	LED​

Features​

Parameter	BenQ TH671ST​	BenQ TH685i​	BenQ TH575​
Video Encoding​	-​	AVC​	-​
Lamp Wattage​	240 Watts​	245 Watts​	210 Watts​
Light Source Life​	-​	20000 Hours​	15000 Hours​
Controller Type​	Button Control​	RCI067​	Remote Control, Button Control​
Control Method​	Remote​	Remote​	Remote​
Mount Type​	Wall Mount​	(Optional),CMG3​	Tabletop Mount​
Noteworthy Features​	Portable​	Internet Built-In, Speakers, Short Throw, 3d-Ready​	Digital Keystone Correction, Speakers, 3d-Ready​

Connectivity​

Parameter	BenQ TH671ST​	BenQ TH685i​	BenQ TH575​
Connectivity Technology​	VGA, HDMI​	USB, HDMI​	HDMI​
Hardware Connectivity​	VGA, HDMI​	HDMI​	HDMI​
Compatible Devices​	Television, Gaming Console, Laptop, Smartphone​	TV Stick​	Laptop, Gaming Console, Speaker​

Measurements​

Parameter	BenQ TH671ST​	BenQ TH685i​	BenQ TH575​
Dimensions L x W x H​	11.65"L x 8.7"W x 4.72"H​	18.3"L x 13.7"W x 7.2"H​	11.65"L x 8.7"W x 4.72"H​
Item Weight​	2.3 Kilograms​	9.6 Pounds​	7.65 Pounds​

Conclusion​

Product	PROS AND CONS​
BenQ TH671ST​	Pros • Bright performance even in well-lit conditions • Versatile for both outdoor and indoor use • Easy setup and compatibility with different screens • Delivers excellent image quality during sunset and in low light • Allows for creative placement options (e.g., on the floor) • Works well with various sound systems for enhanced audio Cons • May require additional measures (like blocking light) for optimal indoor viewing • Temporary setup solutions may not be ideal for permanent installations • Limited by environmental factors such as mosquitoes when used outdoors
BenQ TH685i​	Pros: • Great picture quality, particularly for 4K HDR content • Bright enough for use in well-lit environments • Popular among gamers, providing a solid gaming experience • Significant upgrade from older models (e.g., HR2050A) • Highly recommended for movie watching and family enjoyment Cons: • Bulb requires replacement after only 2 months of use, which is costly • Android TV version can complicate connectivity with multiple devices • Defaults to the built-in Android TV, leading to confusion with remote controls • Limited support for surround sound (5.1) through HDMI ARC, requiring additional devices for Dolby Atmos setup
BenQ TH575​	Pros • Very bright picture, even in well-lit rooms • Sharp image quality • Quiet operation • Inexpensive compared to older models • Vivid colors and good brightness even in ECO mode • Compact footprint • Suitable for multiple uses, including movies and golf simulators • Easy to use Cons • Limited zoom capability, making it hard to find the ideal distance for different devices • Average 3D quality compared to LCD projectors • Noticeable 'screen door effect' on some scenes • Speaker quality is adequate but not sufficient for a complete experience without additional speakers