In fact, before the release of Feiao M15, I had a few conjectures, but I was also the kind of serious late personality split. Sometimes gossip is more annoying than the old lady who sits on the village head and chats every day. Sometimes it is not to ask, not to listen, not to say... Therefore, I did not inquire around before the release.

, let's talk about my guess first:

1. As Feiao's flagship player, M15 is likely to continue the classic appearance and elements of M11 M11PRO, pushing the body material and detail processing to a new level?

2. Will stainless steel or brass versions be introduced like M11?

3. Adopting a double 4499 and true balance architecture, it is inevitable to continue to support 3.5MM, 2.5MM balance and 4.4MM balance at the same time?

4. Will replaceable module design be adopted to improve its expansion performance?

5. Will SIM cards or 5G networks be supported to facilitate users to listen to online resources anytime and anywhere?

5. Is the selling price likely to be 5998 or 6998?

.............................................................................................

the moment the new machine was announced, I was still quite surprised.

did not know that Feiao M15 did not punch according to the routine this time. It drew inspiration from the marble column of the Athenian Temple and adopted a brand-new design language. The waist on both sides of the fuselage is more rounded. SIM card or ESIM card is not supported, and stainless steel or brass version is not introduced in the first place. The price is not 5998 or 6998, but 8998!

Exynos 7872, two AKM AK4499EQ, two Japanese NDK femtosecond crystal oscillators, 10 low-noise operational amplifiers, Qualcomm's top Bluetooth chip CSR8657, 7490mAh high-capacity battery, 21W dual fast charging ............ M15, as the flagship HIFI player launched by Feiao, plays in the top hardware and solutions that Feiao can integrate at present. Such a high price is reasonable.

appearance

. The screen supports 10-point touch gesture operations with a display density of up to 312PPI. Feiao started from M11, and the player screen brings people an excellent control experience. The screen above 5 inches allows users to easily search and manage music in various music apps. The probability of misoperation in text input is greatly reduced.

disadvantage is that it uses 2.5D glass, because the current player output is limited, considering the cost reasons, there is no customized tempered window film for this. I don't know if the government will launch a fully attached water gel film in the later period.

uses PET coated carbon fiber texture back cover, which is not much different from the previous model. Double small gold standard has become standard. Use delicate arc curves on both sides.

Feiao M15 has done very delicate treatment on the small details of knob and screen lock key. It uses a concentric circle analog potentiometer volume knob, and a circle of indicator lights is embedded at the bottom of the knob, which is particularly cool when starting up.

The top 3.5MM,2.5MM, and 4.4MM audio interfaces have different calibers. But Feiao cleverly uses decorative rings to achieve a high degree of visual unity of the three interfaces.

fuselage, with the TYPE-C charging data interface in the middle and the TF card slot on the left. Feiao symmetrically carved a card slot pattern on the left side of the TYPE-C charging data port, with the words DUAL AK4499 engraved on the border.

All physical keys of M15 are concentrated on the left side of the body. Except for the lock screen lever, power key, play/pause key, and the previous and next key, M15 also designs a custom key. Users can customize the key according to their needs and operation preferences. You can set it to enter USB DAC mode with one key, add one key to my favorite, random next tune with one key, switch filter with one key and other different functions.

can be said that this machine conveys exquisite and harmonious senses in many subtle places. No matter which hand you hold the player, you can easily touch these physical keys. As you can imagine, the positions of these buttons have been deliberated over and over again.

Internal Architecture

M15 is the flagship model, and the stacks are not cost-free. It is controlled by Samsung Exynos 7872. Samsung Exynos 7872 processor adopts the current mainstream 14nm process, equipped with 2 2.0GHz A73 large cores and 4 1.6Ghz A53 small cores, with built-in Mali-G71 graphics processor (GPU). The comprehensive performance is comparable to Qualcomm Xiaolong 625, MediaTek Helio P25 and Huawei Kirin 659. It is more than enough to locate the middle mainstream and ensure smooth operation of the player!

two AKM AK4499EQ DACs, M15 may be the world's second portable player equipped with this decoding chip. Unlike AKM's previous flagship chip, AK4499 is a current-output DAC, which inherits AK4497 's 32bit sampling rate and 6 filtered timbres, while S/N values reach an astonishing 140dB,THD N (full high-profile distortion noise)-124dB, which is currently the highest specification in the world. PCM to 768kHz/32bit, DSD to 22.4MHz(DSD512) corresponds to the same as AK4497.

The AK4499 is the first current output DAC component of the AKM brand, which is different from the voltage output DAC headed by AK4497. As a high-configuration current output DAC, the chip refers to the "BD34301EKV" under development of ESS ES9038PRO and ROHM ".

The size of the decoding chip is twice that of AK4497, and the power consumption of AK4499 is about twice that of AK4497. AK4497 is 346mW and AK4499 is 667mW. Therefore, the adoption of AK4499 will inevitably bring about the problems of heat dissipation and power consumption. This also causes the M15 to be higher in temperature than previous models such as M11 and M11 Pro.

M15 is specially equipped with a 7490mAh large-capacity battery to ensure battery life. M15 can reach 15 hours of playback time and 1800 hours of deep standby. At the same time, the player supports QC2.0 21W fast charging, and a single charging only takes 3.5 hours. Compared with mobile phones, this charging time is still not good, but considering its battery capacity and consumer frequency, this charging time is already very good.

In addition, the circuit design of Feiao M15 is quite precise. It uses eight layers of gold sinking process PCB, digital circuit independent shielding cover and professional wave absorbing materials. While improving the utilization rate of circuit board space, the interference between WIFI frequency band and digital and analog circuits is reduced. Customized thermal conductive silicone grease, graphene and white copper fins also effectively transfer the internal heat of the fuselage to the shell, and achieve better heat dissipation through convection with air.

2 Japanese NDK custom second flying crystal oscillators, combined with the third generation FPGA clock algorithm to form a phase-locked loop, to achieve very low jitter and distortion.

2 Texas Instruments OPA2211 to form LPF low-pass filter circuit and 4 OPA1612 to build IV conversion. 4 polymer low loss tantalum capacitors 4 Panasonic stepless film capacitors 8 small film capacitors 28 220uF low loss polymer my capacitors 5 100uF high voltage capacitors... In short, look at the circuit board and you will know how particular this thing is!

M15 is equipped with active servo power supply technology to meet the ever-changing system output settings. When driving 300 Ω headphones, it can also provide desktop-like powerful thrust. Under 32 Ω load, PO output power is 490mW, while balanced output power is as high as 800mW; Under 300 Ω load, PO output power is 70mW and balanced output is as high as 280mW. Compared with any old Feiao model, this thrust is extremely strong!

would like to skim over these hardware, but in order to objectively explain how good this player is, we have to spend half a day.

software adopts Android 7.0 system, global All to DSD, supports MQA 8x decoding, supports DLNA, AirPlay, WiFi song transmission, FiiO Link, dual USB and dual Bluetooth... M15 can basically meet all kinds of listening methods of enthusiasts. In addition, it can also be equipped with DK1 base and desktop decoding for USB output.

sound

M15 brings a sound style with high resolution, precision and clean background. Can present natural and regular timbre restoration and rich information. It is used to listen to different types of music, which can reflect delicate and rich levels and vivid musical emotions. After actual use, it was also found that M15 is a player with more balanced tuning and can take into account many different music types.

M15 is suitable for matching some small earphones such as moving coil, moving iron and ring iron to listen to popular saliva. Take your own FH7 lap iron, it will be a very good combination of rhythm and music. Used to listen to Carlos's Santana music, the strong sense of low-frequency quantity is compelling, and the dive is also very in place, powerful and imposing, but it also leaves people with some fluffy feeling. The strength is still relaxed. For example, the cello at the beginning of Xiao Juan's "We are separated by a River forever" is rich and long, while the sense of quantity and the strength of the image are well controlled. It does not mix up or blow up its head. Although FH7 itself has its own taste and characteristics, in my past several sets of Feiao products, it is not so good in quality and taste.

vocal thickness is moderate, transient and bright. The key is that the brightness is well controlled. The dental sounds of the human voice are very appropriate and sound charming, but not annoying. The high-frequency extension is extremely excellent. In the morning, he was sleepy and was "stung" by the triangle at the beginning of Wan Xiaoli's "Top". He was immediately refreshed and had no sleep. The harmonica in the accompaniment was also so clear and transparent. Fortunately, the middle and lower sets of this set of collocation are stable enough, otherwise... Generally speaking, this set of collocation presents a surging and energetic sense of listening to some rock, electric, folk songs, vocals and instrumental SOLO will feel very much.

M15 LY-06PRO HD600 during the outbreak of the epidemic, often at night, over time, it has become a kind of dependence, especially like to use it to listen to the "Sedek Bale" movie soundtrack such as soothing music, so that it will not disturb my reading thoughts. This set is so "quiet" that I haven't felt its sound seriously for a long time.

LY-06PRO this line is very interesting. It is said that HD600 is a very distinctive equipment in low frequency sense and thickness. If a copper wire is built, it will usually be warmer. However, this LY-06PRO unbounded single crystal copper and HD600 have significantly improved the solidity of low-frequency junction images, and the background has excellent transparency. There is no obvious change in the thickness of the human voice, but a little more gentle and delicate.

Of course, HD600,HD650,HD800S headphones have been in my hands for several years. I usually listen to Prismsound Lyra II,Cayin 66 sets and Jin Bo GA-X desktop equipment in turn. As a portable player, the M15 drives the HD600. Personally, I can hardly say what it has, but its excellent thrust and control are beyond doubt. Driven by this set of matching, HD600 low-frequency dynamics can be well displayed, with moderate sense of quantity, but the strength and clarity give people an excellent impression. It can be said that this collocation can objectively show the warm characteristics of HD600 in low frequency and medium frequency.

the vocal positioning is slightly forward, full and delicate, emotional and energetic. The long tone and humai used to listen to the Yat-Kha are rich, long and charming, and can naturally reveal the unrestrained or poignant emotions on the grassland. Ruggiero. Mendelssohn's Violin Concerto in E minor, which Richie collaborated with the London Symphony Orchestra, has a bright and delicate main melody and is as warm as jade. The overall sound style of the headset is doomed to be unable to bring people sharp and thorough sound, but it can still judge the influence of the front section and the wire on the headset.

this set of collocation is the sound field. It is also Mendelssohn's set of music. If the accompaniment is included, I personally do not have some heat. I use 2.5MM balance to match UM MEST. The details and brightness of violin are much better than HD600. The details between the instruments do not interfere with each other, and the sound field is wider. The HD600 sound field is not too big. It is a good choice to listen to some classical instrumental music SOLO, jazz and folk songs. It is undeniable that M15 is still far from several desktop computers I have used in terms of separation and solid degree of image. However, if you do not plan to invest in desktop equipment, it is not a problem to use M15 to drive some large headphones with high impedance and low sensitivity.

talk about several shortcomings:

1. M15 is really hot, and fever is directly proportional to HIFI in most cases, even if only enthusiasts can understand this!

2. The interaction logic of the main interface of FiiO Music needs to be improved. In fact, I have communicated with individual friends when using M11. For the album cover at the top of the FiiO Music main interface, users will be used to thinking that clicking on the cover is to select the album. But the current interaction method is: click on the cover, pause or play. In fact, Feiao has done a very good job in software interaction, but he has to admit that there is still a gap with Japan and South Korea.

3. The official leather case actually directly removes the magnetic volume knob protective cover because it hinders operation.

4. It is suggested that major accessory factories can timely introduce protective films that fit the screen curve.

is written at the end.

8998 makes the impression of Feiao's conscience in the past price instantly shattered in the hearts of enthusiasts, which makes people collapse. It is simply that people and gods are indignant and incompatible! Although M15 still has room for improvement in the interactive experience of FiiO Music and other software, looking at its luxurious stacking, exquisite workmanship, especially the excellent sound quality performance of various audio interfaces, you will find that the price of M15 8998 is still very cost-effective today when the domestic player is close to 60,000 yuan. You will find that Feiao keeps surpassing itself while maintaining a reasonable price acceptable to enthusiasts, feiao is still the original Feiao!

author:Shuai Guo his uncle 03-24 17:37

website: https://weibo.com/ttarticle/p/show?id=2309404486056484405252