
The Optoma 4K400x is a high-performance 4K UHD projector designed for home theater enthusiasts seeking vibrant image quality and immersive viewing experiences.
Optoma 4K400x
Image Quality:
The 4K400x supports true 4K UHD resolution (3840 x 2160), utilizing pixel-shifting technology to deliver sharp and detailed images. It boasts 3000 ANSI lumens, which provides bright and vivid visuals even in moderately lit rooms.
The projector covers 95% of the DCI-P3 color gamut, allowing for rich, accurate colors and excellent contrast levels. HDR10 compatibility enhances dynamic range, offering deeper blacks and brighter whites.
Brightness and Contrast:
With 3000 lumens, the 4K400x is well-suited for various lighting environments. The contrast ratio of 500,000:1 ensures deep blacks and good shadow detail, contributing to a cinematic viewing experience. #
The projector includes dynamic black technology to optimize contrast in real-time.
Design and Build:
Optoma has designed the 4K400x with a sleek, compact body that fits well in most home theater setups. It features a quiet cooling system, keeping noise levels low during operation (around 26dB in Eco mode).
The lens shift and zoom capabilities provide flexible installation options, making it easier to position the projector precisely.
Connectivity:
The projector offers multiple input options, including two HDMI 2.0 ports, a USB power port, and audio out. It supports HDR10 and HLG formats and is compatible with various devices such as Blu-ray players, gaming consoles, and streaming devices.
Gaming and Motion Handling:
Thanks to a 240Hz refresh rate and low input lag (around 16ms), the 4K400x is an excellent choice for gamers. Motion handling is smooth, with minimal judder during fast scenes, making it suitable for action movies and sports as well.
Sound:
While it includes a built-in 12W speaker, it’s recommended to use an external sound system for a fuller audio experience, especially in larger rooms.
Calibration and User Interface:
The projector comes with multiple picture modes, and it supports ISF calibration for professional tuning. The on-screen menu is intuitive, allowing users to adjust settings easily.
Pros:
True 4K UHD resolution with pixel-shifting.
Bright image with 3000 lumens.
Wide color gamut (95% DCI-P3).
HDR10 and HLG support.
Low input lag for gaming.
Flexible installation with lens shift and zoom.
Quiet operation.
Cons:
Built-in speaker is basic.
No lens memory for multiple aspect ratios.
Could be pricey compared to some competitors.

Verdict:
The Optoma 4K400x projector is a compelling projector for anyone serious about home cinema or gaming. It delivers sharp 4K images with vibrant colors and strong brightness, making it adaptable to various room conditions.
While the built-in sound is limited, pairing it with a quality audio system will unlock its full potential. Overall, it offers excellent value for those seeking a versatile and high-quality 4K projector.