the player of the domestic HIFI brand FiiO has always given people the impression of high cost performance and balanced and reliable functional configuration in all aspects. From FIIO X5, X5 II, X5 III, X7II, to this year's M series, it can be said that FiiO has always adhered to the bucket theory to make products, not seeking to be amazing or outstanding in sound, but from design, workmanship, human-computer interaction, in terms of hardware and software stability and sound, it seems that every player cannot find a slot point. The new player M9 released by the brand not long ago is SLOGEN with "sound, color and art, bucket machine in national bricks". It can be seen that FiiO himself is sincere and confident in all aspects of this player. Let's talk briefly here and give some objective reference to friends who want to buy the player.

appearance

in fact, we have found very obvious brand recognition and unified design language from FiiO X7 and X5 MKIII, but for some reason, FiiO has subverted them in M series. M7 and M9 and M3K recently released seem to have lost FiiO's "likeness" in appearance ".

, it uses an all-aluminum alloy body with a square curve in cross section. The left side of the body adopts a semi-arc hemming design, and the right side adopts an angular cube straight edge. If FiiO M9 said that there was no brand recognition of the previous X7 and X9 series, then among all living beings, the appearance of M9 is its own recognition symbol.is fully fitted with a full viewing angle touch screen, which is a bit of a detour, but when you get the moment the machine is turned on, you will definitely admire the display effect of this small machine. In my opinion, the biggest problem with this display screen is not the display effect, but the difficulty brought by a 1.8-meter strong man who entered information on it to search for the title of the song with two carrot-thick thumbs. The feeling is painful and the gods are angry! But thinking that M9 is not a mobile phone after all, it is a small player, so I can bear it!

screen can help users to easily identify the audio format and working status, but the red light is always on in any state, which means that you should charge the machine!

the top and right sides of the fuselage are empty.

power key, volume wheel, play/pause key, volume addition and subtraction key and TF card slot are all designed on the left side of the body with arc wrapping. If you hold the machine with your right hand, this arc will bring a very fit and comfortable feel, and the index finger of your right hand can easily touch the power key and volume wheel. This design is very considerate. FiiO M9 has a built-in 2G memory capacity. It is estimated that its main function is to find a place for system firmware. Audio files still need to be expanded through TFC card. M9 supports TFC card expansion with a capacity of up to 2T. Although most brands of TFC cards currently have only 256G of maximum capacity available, Leksha has also introduced 512GB U3 V30 A2 high-speed cards priced at 699 yuan,, when the 2T capacity TF card comes out, I believe the price will be much more expensive than the player.

the bottom 3.5MM single-ended output, 2.5MM balanced output and TYPE-C charging data interface. FiiO routinely merges coaxial and LINE OUT into the 3.5MM port. The TYPE-C interface of FiiO M9 is bidirectional. In addition to normal charging and file transfer functions, the interface can be used as USB DAC and can transmit audio data through USB DAC.

function

FiiO officially defines M9 as a bucket machine to show that this player is proficient in everything without short boards and obvious defects. In fact, in my personal opinion, each FiiO machine is a bucket machine with the same price at the same time. Although some of them do not have HiFi, after contacting many models of this brand, my personal most intuitive impression is that FiiO has good quality control, good design, good human-computer interaction and better sound. Such machines may not be the first choice in the minds of enthusiasts, but in the eyes of ordinary consumers, it is really a rare choice. The definition of M9 bucket machine is proposed in an environment where more and more enthusiasts tend to obtain more convenient music resources and desire more connection and listening methods.

In terms of wireless transmission, M9 is the only player among many players that realizes HWA Bluetooth transmission function and USB DAC aptX/aptX HD/LDAC lossless Bluetooth transmission function. HWA, as a high-definition Bluetooth transmission protocol independently developed by Huawei, has been joined by many brands and manufacturers including Huawei, Shengwei, Guoguang Electric Appliance, Walkers, Acoustics Institute of Chinese Academy of Sciences, China Electric Power Institute, China Electric Power Institute, AKM, Cirrus Logic, iriver, Shenghai Sennheiser, FiiO, HiFiMAN, hivi, Taihe Music, etc, it covers almost all fields from smartphone manufacturers, headset manufacturers, audio manufacturers, audio chip manufacturers, professional testing organizations to music content providers. Based on LDHC encoding and decoding, it can reach a transmission rate of 990kbps or more, and can support an audio stream code rate of 24bit/96kHz. It can be regarded as one of the most powerful Bluetooth audio transmission protocols at present. As for the familiar aptX,aptX HD and LDAC, there is no need to introduce too much.

such a wide range of wireless transmission protocols provides excellent adaptation premise for enthusiasts and digital consumers in the selection of wireless headphones. Personally, I also used the 1More three-unit ring iron unlimited headset to listen to it for a period of time with LDAC connection, and its signal transmission is very stable. Of course, it also supports Bluetooth reception such as SBC and LDAC, and will support more protocols with later software updates.

In addition, FiiO M9 also supports WiFi transmission, which supports DLNA and can play music on PC through M9 in WIFI environment. The player also supports OTA upgrades.

FiiO M9 has also done a great job in supporting online streaming media. KKBOX, MOOV, TIDAL, NetEase Cloud Music and other apps are built into the body. With continuous upgrading, more apps will be added to the white list and users can install them themselves. At present, many consumers like to listen to music by paying for members, and more and more apps encrypt music files on their platforms due to copyright issues, resulting in many consumers being unable to play these contents without some apps after paying to download resources from the apps. The FiiO M9 cleverly solved this dilemma through the built-in APP.

Architecture

M9's system is the same as M7 and is deeply customized based on Android, which is why the machine can install many music apps. The Samsung Exynos 7 Dual (7270) central control used in this machine greatly ensures the smoothness and endurance of the system. Exynos 7270, as a processor for wearable devices, integrates memory, power management IC, etc. in addition to the advanced 14nm fin field effect transistor process and thanks to SiP-ePoP packaging technology.

, it uses dual-AK4490EN DAC, built-in independent high-performance A3P030 FPGA chip to clock digital audio, and supports DSD128 hard solution. The low-pass filter (LPF) uses Ti OPA1612 and the current buffer (BUF) uses 2 Ti OPA1622, which enables FiiO M9 to balance the output power to 77mW under 300 Ω load.

In addition, M9 uses an eight-layer multi-stage HDI PCB board with a thickness of only 0.8mm, which greatly improves the internal integration and is also a prerequisite for a compact body and excellent sound quality.

sound quality

has been matched with many earphones and listened for a long time, including FiiO's FH5, Rainbow CH1, Senyun Wujin, etc., as well as T8iE MKII and other moving circle flagship. Considering the reader's reading experience and patience, let's briefly talk about the sound quality performance of FiiO M5 under FH5.

FiiO FH5 is significantly enhanced in the upper reaches of low frequency strength compared with the engineering machines heard at the exhibition several times before. With FiiO M9, it can show sonorous momentum and excellent rhythm. Deep dive, strong low-frequency clarity, fast-paced accompaniment without sloppy water, good elasticity. The key is that the low-frequency sense of quantity and atmosphere of this earphone is very good. It is really satisfactory to match it with FiiO's M9. It is especially interesting to listen to the old-fashioned and tough rock music like Queen's Dragon Attack. This set with excellent atmosphere and rich sound details can also make instruments such as big bass saxophone show a full sense of music. In fact, the low frequency of FiiO M9 is not tough and soft in my personal opinion, but FH5 neutralizes this point very well.

is used to listen to Lee's Ritenour bass tunes, with the middle band guitar, and the keyboard accompaniment shows extremely pleasing brightness and detail. The good transient and brightness make the plucking and tremolo performance of instruments such as guitar bass very charming. And the performance of this type of instrument is more close to the ears than the rainbow CH1, and the thickness and taste are a little more. "You said this city is dirty, I think you are quite thoughtful, you said our love is immortal, I will believe it when I look at you", used to listen to those old rock, full of the taste of years, when young Zhang Chu's voice is so immature, and then jump to his later music, this set of matching can be described as light makeup and heavy touch is always appropriate. There are more meticulous brushstrokes. However, due to copyright reasons, there are few songs of Zhang Chu that can be heard in these APP, Xiami and NetEase Cloud. Although the female voice is not poisonous, its transient and brightness performance is also excellent.

high frequency does not rush, in fact, this set of high frequency extension is excellent, but the sound field is not as large as CH1, and high frequency does not give people the feeling of being too thorough and sharp. It belongs to the delicate and listening type. The front end and headphones show excellent control over the playback of instruments such as piano and violin, and the overtone is timely. The vocals are also difficult to find dental sounds and distortion.

the whole set of collocation reflects excellent clarity and transparency, the sound is solid and powerful, and FH5 does not seem to be able to pick out any connection problems, and is stable and ruthless. The sound field is moderate, the positioning of the instrument is clear and clear, and the sound details and emotion are rich. It can be seen that FiiO has made great efforts in adjusting the sound of its own products.

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