"Large screen" has become the mainstream trend in home-use display devices. Smart projectors are increasingly favored due to their advantages, combining the flexibility of traditional projectors with the rich content and expandability of smart TVs. The next breakthrough for home display technology lies in more consumers being willing to explore and purchase smart projection products, bringing a home theater experience into their living rooms. However, "low resolution and high price" have been common issues in smart projectors. Most models on the market today have resolutions below 1080P, and even those with 1080P often cost around 5,000 yuan, which can be a deterrent for many users.
Recently, Cool LeTV launched the R4 Series Smart Projector, which not only offers 1080P resolution but also delivers excellent value for money. Today, we present a real-world evaluation of this product to help you understand its performance. Let’s dive into the details.
[Appearance Gallery]
The R4S features an all-in-one design, making it more compact and agile than traditional projectors. It is made entirely of metal, featuring a sandblasted finish and a sleek black color that gives it a modern, tech-savvy look. The front panel clearly displays "Full HD 1080P."
The R4S is designed with user convenience in mind. Its sliding lens cover protects the projector lens from scratches, while the top cowhide hand strap and function keys make it easy to handle and carry. The back panel uses a flip design to prevent dust from entering.
One notable feature is the professional-grade dual-channel HIFI stereo system, custom-designed by American AR. This setup enhances the virtual surround sound effect, delivering an immersive experience when watching movies or listening to music.
[Projection Lens and Performance]
The lens is a critical component of any smart projector. The R4S uses a 7-piece all-glass telecentric HD lens and an all-metal precision-milled lens barrel. The highly efficient dual-lighting system improves both performance and reliability, resulting in sharper and clearer images. The use of all-glass lenses and metal materials reduces thermal defocusing and "running coke" effects.
The R4S comes with multiple interfaces, including two USB ports, an HDMI 2.0 port, AV interface, 3.5mm audio, and coaxial digital output. These ensure compatibility with most devices. The heat vent area includes a copper heat-conducting sheet to maintain stable operation over time.
[Projection Experience]
The R4S has a projection ratio of 1.2:1, meaning at a distance of 1 meter, it can project an image width of 0.83 meters. Placing it at a height of 2.6 meters allows for a 100-inch screen, ideal for movies, gaming, or family gatherings.
The R4S uses a RGGB four-channel light source, increasing brightness by 30% compared to RGB three-channel designs. With an 8A high-current LED package and over-current drive technology, it delivers brighter and more vivid images. During testing, the projector displayed high-definition visuals with strong depth perception and excellent color accuracy.
Equipped with a Mstar dual 64-bit smart system and Mali-3D GPU, the R4S supports smooth playback of 4K videos. The characters moved fluidly without lag or blurring.
The R4S includes 11 image optimization settings, including HDR technology. When playing HDR test videos, the screen brightness improved significantly, with enhanced color saturation, texture, and contrast. Scenes like rivers, forests, and mountains appeared more three-dimensional.
Even the fine details on a dragonfly's wings were clearly visible, demonstrating the projector's high-resolution capabilities.
[Performance Testing]
Light intensity is crucial for clear projection. We tested the R4S in both dark and lit environments. Even in daylight, the image remained clear, with sharp character outlines and realistic colors.
The R4S performed well in virtual focus and running coke tests. After one hour of continuous use, the image remained sharp and focused.
In brightness testing using the ANSI 9-point method, the R4S achieved 633 ANSI lumens (slightly lower than the official 880 lumens). The contrast was measured at 72:1, indicating good picture quality.
Noise levels were measured at 62.9 dB near the cooling outlet, while the rest of the device operated quietly at around 40–50 dB.
Temperature tests showed the lens reached 39.9°C, while the outlet was 33.7°C. The overall cooling performance was impressive.
Power consumption was low, with standby at 0.83W and about 60W during video playback.
[System and Features]
The R4S runs on Cool OS, based on Android 6.0, offering a clean and intuitive UI. It includes sections for video, music, office, and games, supporting third-party apps. With 3GB DDR4 RAM, the system operates smoothly.
It supports brightness adjustment, color temperature control, automatic keystone correction, and various projection modes, such as front, rear, and ceiling projection.
The auto-focus and auto-keystone correction functions work automatically, clearing the screen in under 10 seconds. This eliminates the need for manual adjustments, enhancing user experience.
The R4S supports AirPlay, DLNA, and Miracast, allowing seamless casting from Apple, Android, and PC devices. Testing with an iPhone showed smooth and delay-free screen mirroring.
It also integrates iQiyi content, providing access to over 95% of online videos, including movies, TV shows, sports, and documentaries. A built-in 3D cinema area allows users to enjoy 3D content at home using active shutter glasses.
Conclusion:
The R4S is a standout smart projector with excellent performance. It offers 1080P resolution, clear and detailed images, and strong performance in both dark and lit environments. Features like auto-focus and keystone correction greatly enhance usability. Priced at 3,799 yuan, it provides great value compared to other 1080P projectors on the market. If you're looking for a high-quality smart projector, the R4S is definitely worth considering.
For more information on smart TVs and boxes, visit Smart TV Information Network (http://), a leading platform for smart TV and box news, reviews, and software.
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Xuzhou Jitian Intelligent Equipment Co. Ltd , https://www.jitianintelligent.com