At the PRO7 conference, Meizu also brought its own Flow headset that returned to audio.
Although RMB 599 was not cheap, the first sale was hot and sold out in 3 minutes.
The Folw headset uses a three-element combination of dual-acting iron and high-fidelity moving coils. It is equipped with the BVS bass diversion system, rational tuning of the Institute of Acoustics, Chinese Academy of Sciences, and perceptual tuning of professional professionals.
In terms of appearance, Flow is available in both starry sky black and moonlight silver colors. Japan's genius Ping Jing Hao Shang was invited to design the knife, using powder metallurgy and arc drawing technology.
In terms of wearing experience, Meizu 3D printed 1138 Asian ear canal data. After hundreds of surface adjustments, the surface contour of the Flow headset was finally fitting with the human ear. The addition of the micro arc cannula design ensures Wear stability and comfort.
For such a product's materials and workmanship, enthusiasts @ ___archon got and dismantled, Meizu has also been authorized, and friends who like this product and may wish to look down -
FLOW looks like a lot of metal elements from the outside, earplugs, wire controls, plugs are fine brushed metal. Especially the headset itself, because it is irregular shaped shape, using metal to do it is much more difficult than those cylinders, hemispheres, etc., axisymmetric shape of the headset, and in the irregular shape of the fine drawing is far better than the aluminum oxide difficult.
The back of the earplug has an area of ​​very fine metal particles bonded (sintered) together. It should be visually balanced at the back and also provide a little damping. This design is more common in B&O's earplugs. The diameter of the cylinder in the ear part is very thick, and the visualized iron unit should be hidden inside. 
↑↑↑ Line control, splitters, plugs, are very beautiful metal wire drawing.
After watching it outside, it was officially opened.
After uncovering the plastic cover on the lower back, I discovered the mystery - originally thought that the metal part was just a layer of metal sheet. The result did not expect that the upper part of FLOW was entirely an integral metal piece that was injection molded from magnesium alloy, no wonder it was so heavy. !
However, this also explains why you can do such a strange shape. Did you see the injection port in the middle? Magnesium and aluminum alloys can be spray-molded in a similar way to plastics. They are built on molds. Of course, such processes are not cheap. The black area above is a layer of cotton mesh, which should be used to further adjust the cavity damping.
Let's take a look at the decorative plate made of small metal columns. There is a gap on the side, it seems mainly decorative.
Use a little force to separate the first half. You can see the full picture of the metal part, as well as the piece of cotton used to adjust the damping of the rear chamber.
Although it seems that the diameter of this part is quite large, actually the moving coil unit is not large, and the diameter of the diaphragm is about 7.5mm, which is also the more popular size in recent years.
There is a small circuit board on the back of the moving coil unit. The circuit used to divide the frequency of the moving iron is designed on it, although there is only one capacitor (it is not clear from the picture).
Say a few more words. Why iron headphones is difficult to design, mainly in two parts -
The first one is how to mix the sound of moving coils and moving iron on the acoustic design because the moving iron unit does not need a sound cavity and the moving coils; the moving coil sounds are transmitted to the ears through the cavity, and the moving iron directly comes out. The small mouthpiece of the mouthpiece can be used, both of which are unlikely to have enough space inside the small earplug to achieve nearly equal length of transmission. Therefore, the moving coil unit is usually farther away from the earphone outlet than the moving iron unit. This brings about a slight phase difference and produces so-called intermodulation distortion.
Secondly, for the moving iron unit, the frequency response itself is relatively easy to control, because there are a variety of different moving iron units for selection, low frequency, high frequency, medium frequency, or full frequency, but dynamic Not necessarily: Most commercially available moving coils are full-range units, and the micro-motion coil manufacturers are unlikely to develop a "hyperbaric moving coil" for a certain type of ring-iron headphones, so the ring-iron plugs need to be frequency-divided. At least the high frequency of the moving coil must be filtered out. This is the so-called frequency divider.
This is a very familiar thing for HiFi enthusiasts. The importance of crossovers in passive speakers is also self-evident, not even worse than the cabinet design and speaker selection.
But when it comes to earplugs, it is because of the limited space that it is impossible to design complex dividers. As a traditional power divider generally consists of inductors and capacitors, the inductance in the earbuds can only be too great because of its large size, so common crossovers can only be composed of capacitors, but mainly multilayer ceramic capacitors, whether performance or sound quality. It is difficult to compare with large-size film capacitors.
So how to design a sufficiently good divider under such a large limit is also a great challenge.
Because of the frequency division, the introduction of capacitance will also bring about phase changes, which will cause the phase of the electrical signal near the crossover point to change significantly. This phase fluctuation of the electrical signal and the phase difference caused by the mechanical structure affect each other, resulting in the design of the ring iron headset needs to consider the selection, physical structure, ring frequency crossover point, and divider design as a whole. Impact, mutual restraint, so why is it so difficult to debug iron trap earplugs?
Of course, you may ask, there are a lot of cheap ring-iron headphones now. Why do you just want dozens of people? It is very simple, because those headphones are simply to connect the full-frequency moving coil and the full-frequency moving iron in a simple parallel, but just to be a circle, design? debugging? What is it? I don't care.
what. Back to the topic. Enjoy this magnesium alloy injection molding part.
Here, the FLOW wire is also quite interesting. Instead of using a traditional headphone cable, it uses something similar to a line tube.
Peeling away and looking at it can be found that the FLOW headphone cord is not an enameled wire, but the silicone sleeve tube has two independent silver-plated wires with insulating layers inside, and there are fibers inside the single silver-plated wire to increase the tensile strength. The actual experience, this line is much better than the ordinary TPE line in the anti-winding.
When the ring unit is opened, the moving iron unit is hidden inside the ear canal. The green ass is the lead plate at the end of the moving iron unit.
The removed moving iron unit is actually a two-unit parallel moving iron, also known as double iron, and it is an all-metal housing.
So what exactly is a moving iron unit? We must know that there are already many kinds of domestic moving iron units. What kind of FLOW is used? It is time to see the miracle and witness the miracle.
Dangdang! EP61...ha? Is it custom? Whether it is emotional or rational, it tells me this is unlikely.
In turn finally saw the model: 6132B. Although I do not know which one is this specific (not familiar with the moving iron unit), the LOGO on the left clearly indicates that this is a moving iron unit produced by Knowles, which is also known as Daihatsu Electronics.
Nguyen's moving iron can be said to be the unit source of most of the industry's top moving iron and ring-iron headphones. It seems that FLOW has not chosen the "cottage" unit because the price is relatively low.
Finally take a look at the remote control. Surprisingly, the wire control is actually a magnesium alloy injection molding, and the microphone also uses a better MEMS silicon microphone.
Well, even if it's finished, it's finished.
FLOW is an entry-level single-ring, double-iron, ring-iron earplug, using a silver-plated wire, Nine's moving iron unit. The metal part is made of all-magnesium-aluminum alloy, which is at least worthy of workmanship and material selection.
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