what movement: 1 turn/1 iron/4 electrostatic flying hybrid unit headset FX15

In the past few years, Feiao's product line portable desktop goes hand in hand, wired and wireless on both sides of the flower, the pace is fast. In the past few days, Feiao Qiao Mimi has introduced new products. This is their first electrostatic earphone: 1 moving coil, 1 moving iron, 4 static electricity, and mixed unit in-ear earphone FX15. Let's take a look at its architecture configuration.

FX15 uses a 10mm moving coil as bass, PU suspended edge DLC ball top diaphragm structure. DLC(Diamond-Like Carbon), diamond-like carbon, a diaphragm material with excellent acoustic properties. It is very light, and the density of beryllium, but higher than the damping of beryllium, so whether it is leading or trailing edge, the signal is very good to follow.

FX15 adopts Lou's ED-29689-a moving iron component with huge shipments. It is famous for its conjugation with Yinmei ER4 and has become an evergreen tree and benchmark in the moving iron industry.

, we know that ER4 used only one 29689 to adjust the sound of high completion, which shows that this unit has the strength to take the lead. In FX15, 29689 is only responsible for the middle section, that is, the middle and high voice, which is obviously more than enough for a full band unit.

moving coil and moving iron are already very mature sound components. Needless to say, the moving coil unit, from large to small in diameter, is unique in flagship earphone products. After decades of development, the moving iron unit has become a sub-role in the custom earphone industry. Compared with the former two, the micro-electrostatic unit is still a baby.

electrostatic unit group is one of the big selling points of the FX15. It is responsible for the high frequency and ultra-high frequency bands in the headset. Although electrostatic microcells and water-testing headphones have been available for a few years, they are still frankly in a new category. A new thing in the growth period is bound to be immature, inevitably all kinds of wait-and-see and trial and error, there are some technical problems to be overcome. Among them, the first is the sensitivity problem.

Compared with moving coil or moving iron, the sensitivity of electrostatic unit is still low. Some of the previous works of electrostatic mixing headphones on the market use high sensitivity settings, which leads to electrostatic sound being submerged. Much like ice cream blended with a few drops of wine, if there is no, it is called Maotai ice cream. There are some gimmicks, and Maotai liquor does have some ingredients, but it is of little significance and difficult for people to buy it. Some electrostatic hybrid headphones are similarly the case.

in the face of the above sensitivity gap problem, Feiao has corresponding countermeasures. First of all, FX15 adopts the one-to-four scheme: EST65QB02, one transformer drives four electrostatic monomers, reaching a higher sensitivity level of 99db. Secondly, the overall target sensitivity value of the FX15 is set low at 103db. When the volume of the moving coil and the moving iron unit is lowered, the sense of presence of the electrostatic unit will be strengthened. Thus, the embarrassment of "knocking a triangle in a symphony orchestra" was eliminated.

In order to allow the user to intuitively feel the participation effect of the electrostatic unit, a small toggle switch is arranged on the side of the housing of the FX15 to turn on and off the electrostatic unit group. This probably means: the AB switch has been given to you, so experience the difference yourself.

Wire

FX15 has a high wiring specification, using high-purity single crystal silver material, Litz structure 8-core 224-strand wire base, each channel is divided into 4 cores. Silver is the lowest resistivity of the metal, RF high-frequency components of the wire is generally plated on the surface of silver, against the skin effect, reduce signal attenuation. If it is used for the transmission of mixed frequencies such as audio and signals with a large frequency span, pure silver wire is a better choice than silver-plated wire because it maintains consistency from the center to the surface. But the disadvantage is expensive.

plug adopts a straight-plug replaceable head structure. The inside is actually a miniature 4-core connector, and then the outside is a stainless steel locking sleeve. Two adapters were supplied, 3.5 and 4.4mm. Feiao's many wired headphones have adopted this solution. I think it is not only convenient, but also avoids the waste of line base repetition. However, there is actually a small slot in the plug. I'll talk about it later.

tail insertion. This kind of connector can rotate 360 degrees without restriction, and can flexibly adjust the direction when wearing. But the disadvantage is that after using for a long time, the contact will be poor, resulting in intermittent sound. I have encountered many such situations before, including the flagship models of large factories, so I will not call names.

FX15 has been improved in design. The sleeve part is cut into 4 petals to make an elastic structure. This not only increases the microscopic connection points and reduces the contact resistance, but also has optimistic expectations in terms of long-term durability. Because even if it is worn out later, the flap can be slightly expanded to restore the connectivity.

earhook section is pre-formed with heat shrinkable tubing without wire lining. The shell of the tail plug is made of stainless steel, which echoes the material of the plug and the splitter. Because the mirror stainless steel material is very smooth, there is a small metal sheet in the attachment, which is used as a tool for drawing wires, which can be said to be meticulous. However, in actual use, I found that it is also very convenient to use nails. It is not necessary to use this small piece.

thread is 120~130cm. The main thread is relatively thick but soft, and feels good. It is not easy to tangle in practice.

earmuffs

matching earmuffs are very sufficient. In addition to one box of flat boxes, there are two white plastic bags and two bags. There are 6 kinds and 19 pairs in total, which is absolutely difficult to choose. After comparison, I feel that the gray circle red core is more right, probably because its skirt is softer and its opening is larger, which is conducive to absorbing some low frequencies and passing through more high frequencies, so that the connection of various frequency bands and the distribution of high and low frequency energy are more uniform. It is recommended that you try this earmuff, especially before the machine is seasoned.

In addition, the 3 pairs of sleeves in the "FiiO HS18" small bag are also good, the skirt is as soft as a jellyfish, and it is as comfortable as nothing when worn.

sense of hearing

the new machine is that the medium and high frequency areas have a sense of lines and many details. At the same time, the transition between medium and high frequency is smooth, without disjoint or step feeling. The extension and delicacy of the high frequency band are satisfactory.

, because the hanging edge and the dome of the moving coil unit need a certain aging time, the bass feeling of the newly opened sound is relatively common and not brilliant, and the cooperation between the middle and high sections is not very harmonious. However, when the accumulated time to about 10 hours, the bass fusion penetration has been quite good, there is no obvious sense of disconnection.

audition tracks are mainly from Sony HR selection, but also from Apple AM, as shown in the figure below.

album "piano" track "spring breeze 」. The instruments are guqin and tambourine. Listen and feel through. The tambourine hits short and jumps, the knot looks clear, and the bass closing speed is good and does not mix.

album "Lin Stone City Pipa" first track. Mr. Lin's internal strength is like his name, and he plays the piano very forcefully. The recording is of excellent quality and sounds "cored". FX15's medium frequency density is solid, high frequency is thorough, can show the note a grain of Mars splash.

album "Lonely Gourmet Season 2 Sounds". The original soundtrack of the famous electronic mustard tuber drama is also quite interesting. There are many kinds of styles. Listening to it again is like brushing for another season. The recording level is adjusted very high, approaching the upper limit, and the energy is full and refreshing. No matter whether the track is gentle or violent, FX15 can grasp it. The recording of small flaws in individual tracks is also clearly captured.

album Contemporary Percussion Works, Track 1/2/9. There are many kinds of percussion instruments in the album, with large and small knots, fine ones and surging ones. There are simple and rough playing techniques, but also complex and rough. This album has been used repeatedly in AudioTOP previous reviews. The FX15 has a clear representation of the size of the various percussion instruments, as well as their position in space. The bass is moderately elastic, not loose or too stiff. In the last burst paragraph, the FX15 did not appear dynamic compression.

FX15 is not high compared with the same type of headphones, but it is not as low as expected, and the volume anxiety does not exist. When connecting and matching with different equipment, I found that it has a certain degree of reflection and explanation on the soft, hard, fat, thin, cold and warm of the front-end timbre. Therefore, although the tuning of FX15 does not highlight the medium and high frequencies, and there is no bright and glittering sword, I will still classify it as a "relatively transparent" headset.

Electrostatic switch

factory state electrostatic switch is in the ON position. When I tried to turn off the electrostatic group, the sound of FX15 did change obviously, the transparency decreased, the overall feeling was darker, and the amount of high-frequency details was audible. So can you listen to the sound after turning off the static electricity? You can also listen to it for a few minutes and you can adapt and accept it.

Therefore, although the official use of this switch is defined as "allowing users to view the participation effect of the electrostatic unit", it may also be used as a selection switch for two tuning curves in actual use. However, the fingernails cannot be reached, so switching is a little troublesome. The tip of the measured gel pen can be used to switch smoothly.

Features

Sound 4 Electrostatic Ring Iron Hybrid Unit Architecture

rational and pragmatic tuning strategies to enhance the sense of presence of electrostatic units

single crystal sterling silver earphone cord, replaceable plug and modified MMCX tail plug

combines the cavity production process of 3D printing with solid materials.

slot point

When unpacking, the tail part of the earphone is stuck in the tray slot too tightly and is difficult to remove.

The inner wall of the replaceable plug, the angle positioning bump is too shallow, not stupid

instructions perfunctory

Author:AudioTOP Audio NetworkEditor at 07-16 23:59

web site:https://weibo.com/ttarticle/p/show?id=2309404924279505682557