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Vivitek's Quumi Q4 is specially designed for those who like to watch movies for high-quality output, while the compact body can meet the requirements of carrying. For those who like to play games such as Wii, Xbox, PS3, Qumi Q4 is also a very good game companion, can bring you shocking large-screen game. 
The Qumi Q4 is an entry-level product for the Vivitek Qumi series of pico projectors. It has a body weight of only 460 grams, a nominal brightness of 500 lumens, a contrast ratio of 30,000:1, and a resolution of 1280 x 800. The lifetime of the LED light source can be achieved. 30000 hours, even if used for 8 hours a day, it can also be used continuously for 10 years, eliminating the need for users to replace the light bulb.
Small and exquisite as a point of craftsmanship, the Qumi Q4 has a very simple design and is available in black and white. The weight of 460 grams is very convenient to carry. Using piano paint panel, feel very comfortable. The overall workmanship is rigorous and maintains the craftsmanship of the big factory. Here we will appreciate this small and exquisite Qumi Q4 through a set of high-definition photos. 
In terms of interface design, Qumi Q4 provides power, USB, HDMI, AV, AUDIO, and UNIVERSAL ports, which can fully meet the user's different transmission needs, and they are also very professional in the optimization design of the interface. The output quality is very good. . 
In general, whether it is the Qumi Q4 body or related accessories, are very sophisticated, first-class technology, enough to see the manufacturers of this product's intentions. A product with a refined appearance and comfortable feel has already succeeded to a certain extent in half. Let's take a look at the other aspects of Qumi Q4.
Watch high-definition videos, video games, video playback links mainly to investigate whether the projector can play a smooth movie, there is no Kardon phenomenon, quality and color performance is to make users satisfied. Since the Qumi Q4 does not have a built-in system, we used the most familiar Transformers and Avatar examples in the high-definition video playback to see how the Qumi Q4 played. 
From the above picture, we can see that the Qumi Q4's picture quality performance is still very good, and the details of the screen are also very delicate, does not give a rough feeling, the overall very clear and sharp, worthy of recognition. 
As we all know, Avatar is known for its outstanding visual effects and brilliant colors. This is why we chose this film to examine the performance of the projector. From the picture point of view, the overall color reproduction of the Qumi Q4 is very accurate, and there is not much difference between the screen effects in a movie theater. It is undoubtedly a very good thing for a user to have such a performance for a miniature projector. .
Focused and accurate picture clear In the focus test, we observe through a set of fixed PPT files, mainly to investigate the projection function can not be clear and accurate projection screen, no run out of focus, virtual coke phenomenon. Let's take a look at the focus of the Qumi Q4. 
From the picture, we can easily see that the focus of the Qumi Q4 is still very good, whether it is the center of the picture or the surrounding corners can project very clearly, there is no obvious phenomenon of running out of focus. It is not easy for such a small pico projector to perform this way. Worthy of praise!
The main purpose of the amazing color color test is to examine the color reproduction ability of the projector, whether it can accurately restore the color, whether there is a color cast, the treatment of the skin color and the details of the light and shade, and so on. Then we will take a look at the performance of Qumi Q4 in this link. 
From the above picture, we can very intuitively see that the Qumi Q4 color reproduction capability is still very good, the picture is clean and pure, the overall picture quality gives a very transparent feeling. Both the transition of the color and the treatment of the human skin color are in place, and the details of the dark parts are also very clear. There is no case where the color is completely lost. 
From the above two images we can see that the color saturation of the Qumi Q4 is still very high, and the overall color is very bright. In the four-color diagram, there is a slight color cast in yellow and green. For a pico projector, this kind of performance I believe has satisfied most users.
Speak to the objective data section with data
In the objective testing process, the ZOL Testing Center adopts the ANSI standard developed by the American National Standards Association. This standard is also recognized as an authoritative standard in the industry. Before the analysis, we first briefly explain a few terms: First is the peak brightness, especially the highest brightness that a single point can reach in the brightest mode, which is generally at the center point; the maximum brightness is at the brightest mode. The average brightness of the picture can be reached, this value is of higher reference value; ANSI brightness refers to the brightness of the projector can just distinguish eight levels. For more detailed explanation, please refer to the detailed objective test of the projector 
From the chart we can see that the Vivitek Qumi Q4 has a maximum brightness of 293 lumens and an optimized brightness of 293 lumens. Since the Qumi Q4 peak brightness reaches 326 lumens, it is still slightly different from its nominal 500 lumens, but it is so compact. For pico projectors, this performance has been very good.
Heat dissipation section 
After half an hour booting, we measured the Qumi Q4 with professional thermal imaging equipment. The Q4's heat vent temperature was 18 degrees and the body temperature was 36.2 degrees. This may be related to the design of its internal air duct. Can improve the space.
Power section 
We used a professional power meter to test the power consumption of the Q4 under different conditions. In the standby mode, the power consumption of the Q4 was 0.34 watts. In the default mode, the power consumption was 40.28 watts, and in the power-saving mode, it was 13.68 watts. Watts, power performance is still relatively good.
Evaluation Summary Edit Review Product Reviews
1. The first impression is that Qumi Q4's process water is accurate and commendable.
2, the quality of performance and color are very good
3, small and delicate appearance is very likable to carry very convenient
Evaluation summary
The performance of the Qumi Q4 is indeed beyond the expectation of the author. Although it is the entry-level product of the Qumi series, it has left a deep impression on the author whether it is clear and sharp picture quality or rich and delicate colors. Such a compact and portable shape can have such wonderful performance. It is indeed worthy of praise and worthy of users to choose. 
First test of Vivitek Qumi Q4 micro-investment With the popularity of the Chinese movie market, many friends are very fond of watching movies, but because of the noisy cinema or the environment is not enough comfort, the author's friends all like to enjoy the movie at home. At the same time, they also hope to have a projector that is small, portable, and has excellent image quality. Is there such a thing as the best of both worlds? Of course, this Vivitek Qumi Q4 that came to our ZOL test center today is such a small and strong model. Then let's take a look.
The picture shows Qumi Q4
Fine workmanship
Compared with 6P
Black piano paint panel
Interface close-up
Power button close-up
Focus ring and outlet close-up
Compact remote control
Related accessories
Film real shot map
Film real shot map
Film real shot map
Avatar real shot map
Avatar real shot map
Avatar real shot map
Focus effect real shot map
Focus effect real shot map
Focus effect real shot map
The hair is clearly visible
Tower Bridge's very sharp sky is also very pure and transparent
Character skin color is also very soft and natural
Bright and dark details are very clear
The color saturation is high
Four color chart
data analysis
Thermal Image of Qumi Q4
Standby power consumption Default power consumption
Energy saving
Exquisite Qumi Q4
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