As a qualified "half-sand powder", the first part still wants to talk to the tails about some history of Sony headphones before the MDR-Z7. The Sony MDR-Z7 is the same as the Sony XBA-Z5 before the launch. All are "1500 days of waiting", of which Sony XBA-Z5 is of course replaced by Sony's former flagship dynamic earplugs EX-1000, while Sony MDR-Z7 replaces Sony's former flagship dynamic ring headset MDR-Z1000. As for Sony's The former flagship dynamic ring earphone MDR-Z1000 is also a well-known product in the audio industry. The Sony MDR-Z1000 uses a 50mm liquid crystal diaphragm, which has received a lot of praise for its delicate performance and powerful analysis.
The above briefly introduces some of Sony's history on headphones. Now it's back to the topic. Let's take a look at the Sony MDR-Z7 out of the box. The huge box has already predicted that the Sony MDR-Z7 will not be small. The packaging style of the Sony XBA-Z5 is the same as a black box in the outer packaging, and the front is the symbol of faith - SONY.
　 
The official price of the Sony MDR-Z1000 is 3,999 RMB. Although it is a flagship, its price may be suitable for other audio manufacturers, but the Sony MDR-Z1000 does not represent Sony's strongest flagship. If you want to look at the price, Sony's dynamic king R-10 may directly occupy the top. 　 
The age of the Sony R-10 should be relatively distant. It may be traced back to around 1990. The Sony R-10 may be an extreme product made by Sony on civilian headphones. The price is as high as 30,000 RMB, and the earphone casing is mature. The architecture of the eucalyptus tree, the architecture design uses the FRESDAM computer-aided system, which can be said to be one of the world's top ten expensive civilian headphones. The Sony R-10 has sold only a few thousand, and has been discontinued, although its name No one knows the audio industry, but it is still a minority. The above briefly introduces some of Sony's history on headphones. Now it's back to the topic. Let's take a look at the Sony MDR-Z7 out of the box. The huge box has already predicted that the Sony MDR-Z7 will not be small. The packaging style of the Sony XBA-Z5 is the same as a black box in the outer packaging, and the front is the symbol of faith - SONY.
　 
　 
There are not many things in the box, except for the earphone body, there are earphone cable, balanced earphone cable, gold-plated dual-use adapter and instruction manual. As for this balanced earphone cable, because there is no equipment, the tears flow. Less, it is said that Sony MDR-Z7 and Sony PHA-3 are good with the sound, the tail of interest can go to the local store to try. There is also a nameplate in the box, each Sony MDR-Z7 has its own nameplate label. Full of sense of honor. 　 
　 
　 
Sony MDR-Z7 supports wire change, Sony's own shopping mall also provides wire purchase, Sony MDR-Z7's way of changing the line is not directly plugged, but after inserting the jack, also need to rotate the nut to fix, this can prevent the headphone cable from being Inadvertently pulled out. 　 
　 
The shape of the Sony MDR-Z7 is not bad. Compared with the previous generation of the flagship Sony MDR-Z1000, the difference is still quite large. The headphone cavity of the Sony MDR-Z7 is made of all-metal material, and the touch texture is good, at the bottom of the cavity. There is a venting opening, the role of which is to improve the low-frequency texture and transient characteristics. As for the improvement, it will be described in detail below. 　 
　 
Sony MDR-Z7 is made of metal as a material, and the workmanship is very delicate. As the current flagship headset, Sony has made some efforts. And the Sony MDR-Z7 uses a 70mm liquid crystal diaphragm, which may theoretically bring more Strong resolution and detailed performance. 　 
　 
The headgear and earmuffs of the Sony MDR-Z7 are made of artificial leather. The touch is very soft and comfortable to wear. The Sony MDR-Z7 is not a closed-end earphone in the strict sense, but a semi-enclosed earphone. That would not be the boring feeling of closed headphones. The problem of leakage is not serious, and it can basically isolate most of the outside sounds. Although it is said, it is not recommended to bring out the street. 　 
　 
The positioning of the Sony MDR-Z7 is itself aimed at a more professional group. Because of the limitations of the front end, it is not able to play the strength of the Sony MDR-Z7 well, and its wire should be 3 meters in length. The design itself is not Thinking out of the street. Like other headsets, the Sony MDR-Z7 will still have some heat when wearing the ear for a long time. If the weather is too hot, find an air-conditioned room and listen. 　 
Speaking of the sound quality of the Sony MDR-Z7, we must first talk about the slogan of the Sony MDR-Z7, that is "Feel The Air". In fact, this slogan I first thought of not Sony, but the iron triangle AD series. Said the iron triangle AD series is also a very good product, the iron triangle called it "air moving coil". The series of high-end model AD-2000X is also gaining a lot of good name, I have heard the AD series of the iron triangle before, its ethereal The sound is still fresh in my memory, so I listened to the Sony MDR-Z7 by listening to the sound of the AD triangle series. 　 
But unlike my imagination, the sound of the Sony MDR-Z7 is completely different from that of the AD series of the Iron Triangle. The Sony MDR-Z7 should be thick and thick, and the specific listening sense is also used in the audition track. Sony MDR-Z7 is not new, directly considering that it is in the best state. The audition tracks are all lossless format, and the front end uses HIFIMAN's HM-802U. Considering the limited front end quality, it can't be compared with the Taiwan machine, so the sense of hearing is for reference only. . 　 
Listening to the track "AZ", the singer is mizuki, the track is the ending song of "aldnoah zero", and the use of ACG tracks for many times has estimated that he has been a house of the day. This is also a magnificent creation for Sawano. The arrangement of the Sony MDR-Z7 is remarkable, and its powerful resolution is very clear. The sound lines of the female voice are very clear and relatively close to the ear. The separation with the instrument is good, there is no turbidity, low frequency. Not too much, the sense of power is good. Overall, the Sony MDR-Z7 expresses the majestic atmosphere of the song very well. Due to the front limit, the sound field has not yet expanded, and it should be better on the machine. 　 
Listen to the Japanese version of the song "LET IT GO". The singer is May J. This is actually a test song many times. I mainly want to listen to the performance of the headphones in the female voice. The "LET IT GO" feeling under the Sony MDR-Z7 Not transparent enough, May J's voice is a lot thicker, I don't know if it is related to the warm voice of HM-802U. Due to the resolution of Sony MDR-Z7, the sound of May J has some teeth, but it's still not good. More will not particularly affect the sense of hearing. The drum sound of the background is still good, but the dive is not very good, and the atmosphere with May J's voice is still very strong. 　 
Listen to the track "Sugar", the singer is Maroon 5. The "Sugar" under Sony MDR-Z7 is quite sensational. The opening drums are very rhythmic, and Adam's unique sound lines make the overall atmosphere well organized. Although the amount is large, it is not chaotic. In fact, after listening to this song, I slowly understood the meaning of "Feel The Air" claimed by Sony. When the Sony MDR-Z7 interprets "Sugar", the feeling is still very strong. The whole is not too cautious, this is also the original intention of "Feel The Air", that is the sense of presence. 　 
　 
Unlike the iron triangle "air moving coil", the Sony MDR-Z7 pays more attention to the expressiveness of the sense of presence, and transmits the music full of energy to the user's ear. The actual performance is also true. The Sony MDR-Z7 is biased overall. Still quite omnivorous, limited by the front-end quality, I think the true level of the Sony MDR-Z7 should not be tapped yet. Think about the quality of the Sony MDR-Z7 that I heard before in the Sony Store. It seems to be more powerful. The Sony MDR-Z7 has a vent hole at the bottom of the cavity to improve the low frequency, but in fact the low frequency performance of the Sony MDR-Z7 is not excellent, although the texture is good, but the dive is not deep, but for the overall performance, Sony The MDR-Z7 is still worthy of the name of the flagship dynamic headphones. 　 
　 
Postscript For Sony MDR-Z7, my personal opinion is still recommended to buy with PHA-3, of course, the premise is that you already have a good front end. Sony MDR-Z7 is not easy to push, use Sony Walkman ZX2 direct push sound dim Suffocating, although not a bad voice, but also a little waste headphones. Air intake Pressure Sensor (ManifoldAbsolutePressureSensor), hereinafter referred to as a MAP.It with vacuum tube connecting the intake manifold, as the engine of different rotating speed and load induced changes in the intake manifold vacuum, again from the change of the internal resistance of the perceptron, converted into a voltage signal, for ECU modified fuel injection and ignition timing angles.
MAP Sensor,Micro MAP Sensor,Mini MAP Sensor
Xinhui KangYu Control Systems Engineering, Inc. , http://www.kysensors.com