Optoma 4K400STx 4000-Lumen 4K UHD Short-Throw Projector

Overview

The Optoma 4K400STX is a 4K UHD short-throw projector designed to deliver bright and clear images with 4000 lumens of brightness, making it suitable for living rooms, classrooms, and boardrooms. It supports native 4K resolution (3840 x 2160) and HDR10 and HLG formats, which enhance contrast and color accuracy for lifelike visuals. This projector performs well even in environments with ambient light, ensuring your presentations, movies, or games remain vivid and easy to see.

With dual HDMI ports, a VGA input, and a powered USB port, it offers flexible connectivity for gaming consoles, laptops, and streaming devices. The 1080p gaming mode with a 240Hz refresh rate and 4.2ms response time provides smooth and responsive gameplay. Image alignment is simplified through keystone and four-corner correction, supporting screen sizes up to 300 inches.

Key features

• 4000-lumen brightness that maintains clear images in well-lit rooms
• Native 4K UHD resolution for sharp and detailed visuals
• Supports HDR10 and HLG to improve contrast and color depth for more realistic images
• 1080p gaming mode with 240Hz refresh rate and 4.2ms response time for smooth gameplay with minimal lag
• Keystone and four-corner correction features to easily achieve a perfectly aligned picture
• Dual HDMI and VGA inputs allow connection to multiple devices without switching cables
• Powered USB-A port to charge devices or power accessories during use
• Built-in ISF modes to save calibrated settings and maintain consistent image quality in different lighting conditions
• Backlit remote control for convenient operation even in dark environments

Key specs

• Brightness: 4000 lumens
• Resolution: 4K UHD (3840 x 2160)
• Refresh rate (gaming mode): 240Hz at 1080p
• Response time (gaming mode): 4.2 milliseconds
• Projection size: up to 300 inches
• Inputs: 2x HDMI, 1x VGA, 1x USB-A (powered)
• Supported HDR formats: HDR10, HLG

Connectivity and compatibility

This projector offers versatile connectivity options to fit a wide range of devices. Dual HDMI ports allow you to connect gaming consoles, Blu-ray players, or streaming devices simultaneously. The VGA input supports older laptops or desktop computers, while the powered USB-A port can charge compatible devices or power accessories like streaming sticks. These options make it easy to switch between sources without unplugging cables, supporting both modern and legacy equipment.

Performance and reliability

The 4K400STX delivers consistent performance with its high brightness and native 4K resolution, ensuring images stay clear and detailed even in rooms with ambient light. The inclusion of HDR10 and HLG formats enhances color accuracy and contrast, making visuals more immersive. For gamers, the fast refresh rate and low response time reduce motion blur and input lag, providing a responsive experience. The projector’s image correction features help maintain a perfectly aligned picture, while ISF modes allow you to save and recall calibrated settings for reliable image quality over time.

Ideal uses and environments

This projector fits well in environments where both image quality and ease of use are important. It works well in home theaters, classrooms, and professional meeting rooms where bright and detailed visuals are needed. Gamers will appreciate the smooth performance in 1080p mode, while educators and presenters benefit from the large projection size and flexible connectivity. Its ability to perform in ambient light makes it a strong choice for spaces that cannot be fully darkened.