Background

ID： Persistent Immortal Gender: Male Occupation: Worksite Worker Age: 24

preface

Looking at the current smart micro investment market, popular manufacturers such as Shenhua, Jimi, and Nuts, each of these mainstream manufacturers has its own strengths, and their choice of projection light source is surprisingly consistent - they all choose LED light source, But the lumen of the LED light source is not as high as that of the traditional bulb light source (that is, the brightness, the higher the brightness, the less need to turn off the light during projection), so it can become the choice of many families?

If the projector uses LED light source, what advantages will it have? First of all, the application of LED light source can open up a new way for the miniaturization of projector body. Due to the small size of LED light source, it is very suitable for developing smaller projector components, making the projection products more portable; Moreover, LED is also a true cold light source, which does not generate a lot of heat like traditional bulbs, which is very conducive to the heat dissipation of projection products and easier to control the noise generated by fan heat; Secondly, the LED light source has a long life, which means that the projector no longer needs to replace the bulb as frequently as before, increasing the use cost in the later period. In addition, the resolution of mainstream projectors is 1200 * 800 (the reason why I don't choose 1080P is that it is expensive, less and immature). In order to improve the resolution, we need to save more money, Therefore, the current 1080P is not very cost-effective. If children's shoes are obsessed with the image quality but are short of money, it is better to wait for a few years. It is better to get into the shoes when the resolution is improved ， In short, the fineness of 720p (1200 * 800) is no longer critical. At the same time, the author also hopes that in the future, led projectors will continue to improve the resolution and lumen, just like the mobile phones with retinal resolution in those days, and will enter thousands of households just like televisions.

Generally, the parameters of electronic products should be looked at first, so from the following figure See This paragraph should It's really rare to calculate the high-end level of intelligent micro investment

(Those who don't like wasting time reading text can directly watch the following pictures, videos and endings, The following pictures were taken by the author with Xiaomi's mobile phone. Due to the author's work, only when it rains for a long time, he has a few days off, and he dare not go outside to take pictures. Therefore, the evaluation scene is indoors. It is a fool who really takes photos, and there is no photography skill PS to speak of)

Now, let's welcome you to enter from the perspective of observers and essayists Unreasonable and true Evaluation phase of

Unpacking ---Front - side interface - front lens cover - all accessories - startup - debugging - influence on the file system format of U disk - ① playing 2D movies--- ② Play 3D movie--- ③ Carry out picture contrast test of projector--- ④ Test the delay of connecting the projection game console --- ⑤ Temperature and noise--- ⑥ General summary+score

First of all, thank you @Lei Feng and @Jimi Technology Give the author a chance to try

Z4X Classic Unpacking Photo

The packaging is perfect, which protects the big brother Jimi z4x very well.  

Lift the big brother's shell and take out the host. You can clearly see that there is also a layer of tip film on it, which says about 3D gesture Recognized gestures Cut songs, adjust the volume (similar to the somatosensory fruit ninja) and use the switch button.

At the same time, the author also Z4X host Take a measurement Weight ≈ 1.183Kg In terms of weight, it is well controlled. Compared with the old projector, it is really lightweight.

Take the big brother out of the box and pull off the film. The author can feel the white shell is obviously Sanding Material, and the black "CD disc" in the middle feels more textured than frosted, and black and white give a literary style. It has to be said that although the shell is made of frosted material, it has defects at the same time. If the protective measures are improper "Hands are cheap" The salty pig hands are often touched. The white scrub will become black and yellow after a long time. As time goes by, it is difficult to wipe it off with a rag.

A close-up and description of the interface is provided on the side. The interface is very rich, and there are cooling holes beside it. One SPDIF (optical audio output port) is still needed, which is perfect.

After turning from the side to the front, a very obvious harman/kardon（ Harman Carton) The logo explains this. Harman Carton may be known to all, but it's first-class Car audio equipment It's all from this manufacturer. It's really good that Jimi can cooperate with it. It solves the problem of sound effect and sound size of ordinary intelligent projectors. Therefore, I think that ordinary people can use enough sound. What's not good is mono.

Here I saw a lens cover. The sliding cover switch design is very user-friendly. The lens cover and the light source switch are combined into one and pushed open Lens baffle ， Z4X It can effectively prevent the lens from being grayed out and abrasion. This function can also be applied to listening to music and downloading resources.

Then open the box and take out everything inside. It can be seen that there are a lot of accessories, including   host One, power cord ， 19V、4.74A The power adapter ， It can be switched off by electric focusing and remote control Remote control ， One spare The button battery ， and 4 hard disk screws (explained later here) , and Adapter plate (It can be switched to the hole of tripod or universal camera interface) A piece of paper instructions , and one more Mango Year VIP Card (The service worth 720 yuan a year has many resources). It's very important for me to say three times: as the main 3D projector, the standard configuration is incredibly No 3D glasses ， I had to ask Lao Wang next door for help 。。

I have to mention this Remote control . Although the handle is good, the button battery used is always defective, which is easy to lead to poor contact. Therefore, the author occasionally encountered during the process of pressing keys on the remote control, and the solution is to press and click or insert a piece of scrap paper in it.

The contents of the manual and the keys of the remote control are shown in the figure below, which is very simple and clear

Following the instruction paper and the warm voice prompt when turning on the machine, the author successfully turned on the machine, and then a song "reserved" sung by Li Jian was sung along with the machine, and the sound effect was very good. However, the author was not fascinated by Li Jian's cover singing, and then changed the music on the machine. Then he projected the picture onto the wall, because all the people in the house were Patterned wall cloth with concave convex ， So the projected image quality has to be used To bear to see To describe . Let's put it aside for the time being, and then carry out the following tests when the curtain is available.

The gorgeous dividing line passed quickly after several weeks-------------------------------------------------------------------------------------------------------------------------

I just waited for about 2 weeks to have another holiday. The author went to buy a piece Bracket type white plastic Screen 100 '16:9..

The author suggests: if you bring your own white wall at home Or wallpaper, wall cloth, etc. After the projector is purchased, test the effect first Don't buy curtains blindly. Generally, the screen of several hundred yuan is no different from the picture projected on the white wall of the house Of course, geeks can replace high-end Metal screen（ Although the perspective is small, the projection effect is really powerful ） 。

I have to say that the Z4X model does not support Left and right trapezoidal rectification ， Therefore It takes a lot of time to find the golden position and angle, and it took a lot of effort to get it done. What the author uses here is to first lay the projection screen and keep it still, then set up the projector on the table and connect it through the elbow joint, and finally move the table to find the best position.

After this boot up, the latest firmware version 1.7.52 was forced to be updated after the wifi was connected for no apparent reason, and the scene of the crime was not photographed.

But in The latest 1.7.52 firmware has a warning  ( Filter the installation of U disk apk and shield the "illegal" video software in the application market as required by radio and television) It seems that it is impossible to install other live broadcast software..

I was ready to play the movie 《 Minions 》 The left and right 3D movies are copied to the USB flash disk, However, the replication is not smooth It's a small trouble. I can't copy it..

It can't be copied in, not because the USB disk space is not enough After a search, Guo Guoniang realized that FAT32 File system format and 4GB is not supported The above single file needs to be formatted as NTFS Format or EXFAT Format of file system . Then successfully copied a 20G《 3D Ant Man 》

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① Preparation is complete, Start playing ordinary movie test

The following picture is a 2D version of the Little Yellow Man and Ant Man. Many of the grainy images are taken due to mobile phone problems. Please refer to the actual effect.

② Now start testing 3D mode

   Because the polar meter projector is active 3D, the left and right 3D modes are selected on the menu. The image is like the blurred ghost below. After that, I put on 3D glasses, and when I turned on the glasses, the 3D shock effect immediately emerged.

It should be noted that the 3D depth of field may not be as good as the effect (it varies from person to person), it may also be the source I choose, it may also be the source that asks questions, and of course it may also be the effect of the screen (I heard that the metal screen has a better 3D effect although it has a small perspective).

As for the projection distance, the distance from my sofa to the screen is about 2.6 meters on the projection support screen. This time, the screen is fully projected, and the size of the screen is 100 inches 16:9, so the official 76 inch 2m is basically correct.

PS: I forgot to say that this is the equipment prepared for the following test, Tripod, Z80 high-speed USB flash disk and Infrared temperature monitor, And borrowed from my little friend and Lao Wang next door One set of PS4 and 3D glasses Projector

③ Next, compare the images of the two projectors

The test fragment is Blue Fat Man Goes with Me, All are played according to the default settings, and the lumen brightness is maximized. I forgot to borrow the remote control, so I used the computer to output and play On the right side of the big screen is Kimi. Let's not mention the others. In terms of sound quality, it has already exploded the one next door to Lao Wang. Then in terms of picture quality, size and clarity, I feel that Kimi has won a lot. Of course, the actual price of Kimi is about 2400. A projection borrowed from Lao Wang is about 3000 here The cost performance ratio is still very obvious.

④ Let's test Is to connect to the game console PS4

What needs to be tested is whether the transmission projection picture is not synchronized when the projector is connected to the host computer to play games Delay problem , and response speed Is it enough? Because the author's level is limited, he can only test the delay problem, which is not good Please forgive me 。

following all use 《 blood kinship 》And《 God Of War III 》 These two old game masterpieces.

The first test is "Blood Relationship", which is similar to the operation of ghost crying, but is much more difficult than ghost crying. If there is a little delay, it is basically impossible to play. Here, by the way, we can compare the picture effect when the lights are turned on and off. The author emphasizes that the shooting level of mobile phones is limited, Everything is subject to the actual effect 。

I tried it for a short time. It was very good. There was no delay. The action was very smooth and synchronized with the handle. On the screen, the picture quality is similar to that of watching a movie. At the same time, there is no drag. After a long trial, there is no "out of focus phenomenon". Indeed, it is really great to play games on a large screen.

The above blood relationship is over, and the following is the same action game《 God of War 》The trial result is the same as above, but the picture quality of this model is good, and it feels like a movie is playing. If shooting games run on the Z4X model, here is the author Just Didn't express clearly.

⑤ Let's test It's about temperature And noise

Z4X is connected at the pole meter HDMI Operation Semih. Rear temperature measurement (the area taken is the external temperature of the heat sink) The average temperature is about 40 degrees Left and right, because the Android system is not running prove The LED light source has low calorific value, which is true, but the author believes that most of the calorific value actually comes from the heat generated by the processor chip when the Android system is running. It is estimated that the 4K video source decoding or Android games running on the projector will be even hotter and hotter..

In the ordinary process of playing the movie and connecting the projection, the author did not hear any sound, and only heard the buzzing fan turning when his ear was close to him 。

By the way, I heard that Jimi still Support hard disk ， that Where is it? In fact, it is behind the front of the host. After the screws are unscrewed, they can be easily removed Hard disk screws It will come in handy 。

  I have to say that there is a warning : The hard disk compartment supports 2.5 inch solid state disk, please do not insert mechanical hard disk (to avoid the impact of horn vibration on the service life of mechanical hard disk) However, SSD is not cheap. 120G is about 400-500 faster, and mechanical HDD will be damaged. I have tried to reduce 2.5 inch 9.5MM The thick mechanical hard disk is put in, but it can't be covered. It seems that it can only be put in 7MM Thick, solid state should invite local tyrants. In fact, the hard disk can also be connected to the two USB ports on the side of the host beside the power supply, so you don't have to worry about the life and other worries caused by speaker vibration.

⑥ General summary ：

The first is sound. With the addition of Harman Kardon audio equipment, it can be said that the Z4X has basically solved the problem of sound. Yes, if you don't have the ultimate requirements for sound effects, the built-in sound of the Jimi Z4X is quite powerful. In addition, Thunderbolt is also supported Offline download , which is equivalent to the standby download of a computer with lower power consumption. In addition, the projector light source is not turned on when downloading in the standby mode, which saves the cost of buying an offline download router, and can also be used as a subwoofer wifi sound.

Then I have to say something about the effect of the projection of the picture. Because the LED light source used has a long life, it may be above the lumen. Although there are not tens of thousands of projectors with the same price and above, the old bulb type brightness is high, but if it is not in broad daylight (the environment where the curtains are open very bright), You just need to draw the curtains, The super flat screen TV is very comfortable to watch anything, and it is completely enough for home use. In addition, the author compared the pictures with a projector of Lao Wang next door, and the picture quality of Jimi Z4X is really good. There is also the problem of projection distance. It needs 2m for 76 inch projection, but it needs 100 inch projection, so it is enough to prepare about 2.6m. Secondly, if you want to reduce the size of the picture, Jimi has a special function called Stepless zoom In the set projection setting, this function is also practical. When the projection distance is relatively long, but you want a small picture, you can use this function to adjust the picture size.

Finally, it is about the choice of location. Because of the addition of the conversion plate accessory (the previous version of the Jimi z4x does not have this accessory), the Jimi Z4X can be connected to various places. It can be hung on the wall, connected to a tripod, or hung on the ceiling, giving play to endless imagination.

[Conclusion]

The accessories do not come with 3D glasses, the host frosting is fun but not dirt resistant, the battery compartment of the remote control is poorly contacted, the supported hard disk box can only be used with a 7mm host without its own mobile power supply, and there is no ladder correction Left right trapezoid Correction, unable to realize auto focus (adjust with remote control, which is always troublesome for lazy people). The resolution is suggested to be 1080p, In fact, these small shortcomings are only a drop in the ocean compared with their advantages It can be ignored for some children's shoes with large nerves After all, it is impossible for every product to be so perfect. In short, this Jimi Z4X is a cost-effective choice in terms of both appearance and pragmatic functions, so please refer to this article according to the actual situation.

Postscript: I heard that the new polar meter Z4 aurora has left and right trapezoid correction, and its performance has also been improved. I don't know how to measure lumens, but I'm looking forward to it

To sum up, the score of this trial

Appearance and material: 4.9 Practicality: 4.7 Extensibility: 4.9 Price performance ratio: 4.8 Comprehensive score: 4.8  

Finally, thank you again Lei Feng and Jimi Technology , can give such a valuable product to me for evaluation. The shortcomings of the evaluation article edited in a hurry this time, please forgive and point out, thank you.