Powerful features, burst configuration, Feiao M9 experience

music players have matured a lot after years of development, especially domestic players have made full progress in workmanship, system UI and product performance. The development of the player this year is divided into two branches: one is to continue to explore the upper limit of sound and hearing, and the other is to pursue functional perfection as a player. Today's protagonist Feiao M9 is the player born under the latter route.

In order to pursue powerful functions, Feiao M9 almost takes the specifications of mobile phones to make players. It can be said that M9 is one of the most powerful player products at present. Because M9 has many functions, the narrative may seem lack of organization. I'll take it fromeasy-to-use interaction, powerful configuration, rich functions and expected sound qualitythese four aspects to talk to you about M9.

first is easy-to-use interaction

wants to be fully functional, it needs to have a powerful "heart" and the performance of the main control processor must be guaranteed. The main control of M9 is Samsung Exynos 7270, using 14NM technology, dual-core 1Ghz processor. This master internal integration LPDDR3 768M RAM, 4G ROM, WIFI and Bluetooth 4.2, etc. This is a highly integrated SOC, and it has the characteristics of small core area and low power consumption. Previously, it was very topical as the master of Feiao M7.

Regarding the Exynos 7270, the official design is for smart wearable devices, and these features seem to be very consistent with the use of music players, especially the commendable characteristics of low power consumption, low heat generation and small size. Compared with some master chips that are still using "ancient inventory", this is very kind. However, this is the development of a brand-new platform, which is also the price Feiao paid for forcing the Exynos 7270. At present, only a few Samsung wearable devices on the market use this CPU, and Feiao's use of this master is tantamount to clearing up wasteland. It is for this reason that Feiao has the experience of successful development of M7 and has a more comprehensive and perfect functional experience of M9.

has a powerful core to ensure comprehensive functions, it is very important to realize the interaction of these functions and the design of operation. The system UI and operation logic of M9 and M7 are almost the same. The menu of M9 system desktop adopts 6-grid APP display, which realizes certain functions through up and down, left and right sides of the edge. Some basic operation settings are consistent with Android system, and users can get started quickly. The screen resolution is 480 × 800, the visual effect is not bad, and the brightness is higher than that of other players.

have a curved surface, which is good for holding. It is different from M7, the power button at the top is also moved here, and other buttons such as the volume wheel have not changed.

M9 is Feiao Music. The APP can realize many core functions in the player, such as DLNA, HWA Bluetooth codec, and USB output mode. Many powerful audio functions in M9 publicity are realized through this software.

In addition, another bright spot in M9 interactive design is RGB indicator light. Different colors can tell the user their current working status, and the color indication can be changed when playing Hi-Res audio and ordinary audio and when different Bluetooth codecs are used.

powerful configuration

M9 has excellent body workmanship, and the all-metal body is wrapped in the biggest highlight of M9 this time-full hardware configuration.

In addition to the main control of Exynos 7270, two AK4490EN DAC chips, one A3P030 FPGA chip, one OPA1612 used as a low-pass filter, and two OPA1622 used as an extended current op amp. Seeing this configuration almost moved people to cry. Of course, we can see from the motherboard officially announced by Feiao that even if the area of the motherboard made of L-type is not large, M9 uses an eight-layer multi-stage HDI PCB. To integrate so many components and chips, PCB has very high requirements. Too few layers are not conducive to wiring, and too many layers are too costly. The 0.8mm PCB used by Feiao this time not only ensures the lightness and thinness of the motherboard, but also reduces the interference between components.

audio architecture, the dual AK4490EN chip needless to say, A3P030 FPGA chip is used for digital signal clock processing and DSD hard solution on M9 audio architecture, OPA1612 for low-pass filtering of voltage signal after I/V conversion after DAC, and OPA1622 for current signal amplification, so that the player has greater thrust. This is a very mature and novel audio architecture. The reason why it is novel is that the addition of this FPGA chip makes M9 digital signal processing more leisurely. M9 supports 2.5mm balanced interface, dual balanced and low distortion op amp chip use so that it can obtain a purer sound experience under the balanced interface.

rich features

M9 is very powerful as a player. In addition to 3.5mm single-ended and 2.5mm balanced output, it also supports coaxial and USB asynchronous output, and also supports USB DAC function. When using USB DAC function, M9 can act as a Bluetooth adapter to transmit Bluetooth signals and use it with Bluetooth headsets, so that the Bluetooth of the computer has a better listening experience. This function is my first contact, it's exciting to think about having your laptop or desktop support LDAC.

M9, Bluetooth can support two heavyweight codecs, aptX HD and LDAC, as well as the newly released HWA codec. As for WIFI, M9 actually supports DLNA besides WIFI songs. This is a AirPlay-like solution that can play songs on computers or NAS. However, M9 also prepares various music apps for users to listen directly from the cloud.

the desired sound quality

In order to better describe the sound of M9, here is a comparison of iPhone X (with official patch cord). The configuration and function of M9 are very powerful, and the powerful master control also guarantees M9's DSP performance. In addition to USB and coaxial output, the main tests here are the 3.5 single-ended interface and 2.5 balanced interface of M9.

M9 is not bad. The 3.5mm single-ended interface can cope well with the high-sensitivity and low-resistance earplugs that are relatively easy to push in most earplug products today. This time, Sony MDR-EX1000 and Feiao FH1 are matched for audition. M9 can provide more analytical power when pushing these two small earplugs, enriching the sound level and details. M9 did not deliberately create an exaggerated sound field experience. The relatively positive and loose sound field is more adaptable to a wide range of music.

M9 is more straightforward than that of iPhone X. What is more intuitive is that it brings more high frequency extension and high frequency dynamics, making people feel that the sound is brighter and the transient response is faster. Thanks to the excellent performance of high-frequency dynamics, the connection of the medium and high-frequency parts will not be particularly abrupt, and the sound of the whole medium and high-frequency part is full and full of tension.

M9 is a high-density, neutral, and loose sound style, which is very compound to the style of popular music. Compared with iPhone X, the instrument in the intermediate frequency part of M9 is clearer than the human voice, and it is not a level opponent in terms of information. M9 can feel stronger dental control when matching with Sony MDR-EX1000, which is also the embodiment of Feiao's accurate grasp of details in tuning.

the low-frequency part M9 is relatively loose, the dive is not particularly deep, and it can provide more low-frequency layering. Listening with MDR-EX1000 can obtain a looser low-frequency hearing. M9 has good low-frequency control. When pushing high-sensitivity and low-resistance earplugs such as FH1, it will make people feel that the low-frequency is more pure. Its low-frequency part has better dynamics and can perform any music with strong rhythm. Unique charm.

In addition to the increase of thrust under the balanced port, the advantage of the dynamic range of medium and high frequencies is further expanded, while the sound of low frequency tension erosion is released without any modification. Compared with single-ended, the balanced interface is more suitable for some low-sensitivity or high-impedance earplugs, which will make some low-resistance earplugs appear low-frequency distortion.

, the tradition of Feiao player's sound, such as cleanliness, outstanding resolution and wide sound field, has been preserved on M9. Compared with Feiao's M7, the tuning of M9 is more mature and more rigorous in details. Compared with the iPhone X, the sound is relatively mellow, natural and sharp. The relatively straightforward style of M9 will more cater to the positive and rigorous listening views of most domestic fans. The style of music I have adapted to is also very broad, so I will not give any examples here.

In fact, there are many contents that are not mentioned in this article, such as battery life, system use experience and function segmentation, etc. This is because M9 itself is a functional player, and in order to release the performance of Exynos 7270, the firmware update and follow-up of manufacturers will not be less in the future. This long-term experience process also hopes that M9 will be more perfect and perfect in all aspects. In addition, the price of M9 is less than 2000 yuan, which is incredible as a music player produced by a professional audio factory in China.

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