"Large screen" has become the mainstream trend in home-use display devices. Smart projectors are increasingly favored for combining the advantages of traditional projectors (such as flexible screen size) and smart TVs (rich content and expandability). The next breakthrough in home display technology is expected to be the growing consumer interest in smart projectors, which are gradually bringing a big-screen home theater experience into households. However, "low resolution and high price" remain common issues in current smart projection products. Most models on the market have resolutions below 1080P, and even those with 1080P often cost around 5,000 yuan, which deters many potential buyers.
Recently, Cool LeTV launched the R4S Smart Projector, which not only offers 1080P resolution but also provides an excellent value-for-money proposition. Today, we bring you a real-world evaluation of this product to see how it performs. Let’s take a closer look at the review.
[Appearance Gallery]
The R4S features an all-in-one design that is more compact and agile than traditional projectors. Its overall construction uses all-metal materials with a sandblasted finish and a black color, giving it a modern, tech-savvy look. The front clearly displays "Full HD 1080P."
The R4S includes user-friendly details such as a sliding lens cover that protects the projection lens from wear. It also comes with a top cowhide hand strap and functional keys for easy control and portability. The back panel uses a flip design to prevent dust from entering.
What stands out is the professional-grade dual-channel HIFI stereo system customized by American AR. This speaker layout enhances the virtual surround sound effect, delivering an immersive audio experience for both movies and music.
The lens is the core component of any projector, and the R4S features a 7-piece all-glass telecentric HD lens along with an all-metal precision-milled lens barrel. The highly efficient dual-lighting system improves performance and reliability while ensuring clearer and sharper images. The use of all-glass lenses and metal housing reduces thermal defocusing and "burning" effects.
The R4S is equipped with two USB ports, an HDMI 2.0 interface, AV input, a 3.5mm audio jack, and a coaxial digital output. These interfaces meet most daily needs. Below the interface, there is a heat vent, and inside, a copper heat conductive sheet ensures stable and long-term operation.
[Projection Experience]
The R4S has a 1.2:1 throw ratio, meaning that at a distance of 1 meter, the image width reaches 0.83 meters. Placing it at a height of 2.6 meters allows for a 100-inch projection. Whether watching a movie, playing games, or hosting a party, the large-screen experience is impressive.
It uses a four-channel RGGB light source design, increasing brightness by 30% compared to RGB three-color designs. With an 8A high-current LED package and over-current drive technology, the brightness is upgraded by 70%. During testing, the image quality was sharp, with strong depth perception and excellent color and detail restoration.
The R4S runs on a Mstar dual 64-bit smart system with a Mali GPU, supporting smooth playback of European 4K videos. Playing a 4K test video showed smooth motion without lag or blur.
The projector includes 11 image optimization settings, including HDR technology. Testing HDR content showed improved brightness, vibrant colors, and strong contrast, making scenes like rivers, forests, and mountains more vivid and three-dimensional.
Even the fine details on a dragonfly's wings were clearly visible, showcasing the R4S's 1080P resolution.
[Projection Data Measurement]
Light intensity is a key factor affecting projection clarity. We tested the R4S in both dark and lit environments to address common user concerns about unclear images during daylight.
In a lit environment, the R4S still delivered clear images, with distinct character outlines and realistic colors. The R4S performed well in bright conditions.
1. **Focus and Burn Test**
The R4S uses a 7-piece all-glass lens and a metal barrel, performing well in focus and burn tests. After one hour of operation, the image remained sharp, with no signs of blur or focus loss.
2. **Brightness Test**
Using the ANSI 9-point method, the measured brightness was 633 ANSI lumens (slightly lower than the official 880 lumens due to environmental factors).
3. **Contrast Test**
The ANSI contrast was 72:1, indicating good image quality and rich color performance.
4. **Noise Test**
The loudest point was near the cooling outlet, reaching 62.9 dB. Other areas were around 40-50 dB, slightly above ideal quiet levels but acceptable.
5. **Temperature Test**
The outlet temperature was 33.7°C, the lens reached 39.9°C, and the body sides were close to room temperature, showing good heat dissipation.
6. **Power Consumption Test**
Standby power was 0.83W, and during online video playback, it consumed about 60W, rising to 63W when playing local videos.
[System and Function]
The R4S runs on Cool OS, based on Android 6.0, with a clean UI and four main sections: video, music, office, and games. With 3GB DDR4 RAM, the system operates smoothly.
It supports brightness adjustment, color temperature control, automatic keystone correction, and multiple projection modes (front, rear, ceiling). The auto-focus and auto-keystone functions work quickly, enhancing user convenience.
It also 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.
The R4S integrates iQiyi content, covering over 95% of online videos, including movies, TV shows, variety programs, animations, sports, documentaries, and short videos. It also supports full-web search and offers a 3D cinema section using DLP-3D active shutter technology, allowing users to enjoy 3D content at home with 3D glasses.
In conclusion, the R4S is a standout smart projector with 1080P resolution, excellent image quality, and reliable performance even in bright environments. Features like auto-focus and keystone correction greatly enhance the user experience. Priced at 3,799 yuan, it offers great value compared to other 1080P projectors on the market. For consumers interested in smart projectors, the R4S is definitely worth considering.
For more information on smart TVs and boxes, visit Smart TV Information Network (http://), China’s leading platform for smart TV and box updates, providing news, communication, software, and more.
40L Agriculture Drone Agricultural Sprayer Agricultural Spraying Drone Drones Agriculture Sprayer 30L Agriculture Drone Fertilizer Drone
Xuzhou Jitian Intelligent Equipment Co. Ltd , https://www.jitianintelligent.com