FiiO M9 – Review

FiiO M9

FiiO M9

| DAP | Dual AK4490EN DACs | A3P030 FPGA | OPA1612 LPF | 2x OPA1622 BUF | USB DAC | Bluetooth | DSD128 | DLNA | Touch Screen |

? FiiO M9, an advanced Android-based, portable music player/DAP/DAC with an endless amount of premium specs and a Hi-Res Audio certification.

The FiiO M9 is the newest DAC/DAP from the brand which is also placed as the flagship model on the M line. The model is part of the latest products released by FiiO, among which you can find the:

The FiiO M9 features two AK4490EN DACs, a Samsung Exynos 7270 (14nm) Dual-Core CPU running at 1GHz, Bluetooth v4.2 and an Actel ProASIC 3 A3P030 FPGA with native DSD128 support.

The FiiO M9 sits right above the FiiO M7 with improvements in design, usability and technical specs. Among the upgrades you are getting 4 audio output options (3.5mm, SPDIF, 2.5mm balanced and USB Type-C audio out), 30 hours of battery life (in BT mode), a recommended headphone impedance extending up to 300 ohm (M7 is 100 ohm), 120 volume steps (doubling the precision of volume control from the M7 and inline with the FiiO X7 Mark II and FiiO X5 Mark III) and a battery with more juice than the M7 (25% more mAh).

If you are reading our FiiO M9 review you probably already know FiiO and many of their popular products. If you are not very familiar with the brand, some of their most famous DAPs, DACs and amplifiers include the:

You can buy the FiiO M9 in:

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FiiO M9 Review

Tests & Scores


Advanced Features

The FiiO M9 features include advanced options such as:

  • USB DAC: Asynchronous USB DAC function capable of 192kHz/32bit – can be connected as an external USB DAC on Windows and Mac computers.
  • Quad output connection: standard 3.5mm headphone jack, 2.5mm TRRS balanced output, USB Type-C audio output, SPDIF.
  • CTIA and iOS compatiblity: audio jack compatible with in-line control of Android and iOS headphones
  • DLNA
  • Music file transferring with smartphones and computers through WiFi
  • Preloaded music streaming apps
  • Bluetooth 4.2
  • Lossless Bluetooth codecs: LDAC, aptX, 24-bit aptx HD, SBC, HWA
  • Micro SD card reader: up to 2048GB (2TB) cards
  • Native DSD support: hardware decoding of DSD64/128
  • IPS Touch Screen with gestures
  • Computer Bluetooth transmitter: an useful match when used with the FiiO BTR3
  • Bluetooth receiver functionality: the FiiO M9 can act as a Bluetooth receiver and output the audio through SPDIF out (LDAC codec feature not available yet but that will be included in future firmware upgrades)
  • OTA and through-card firmware upgrades
  • Eight-layer HDI PCB
  • TI OPA1612 LPF
  • Dual TI OPA1622 op-amps



FiiO M9 weight in Ounces and FiiO M9 weight in grams.

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Accessories & Packaging

The FiiO M9 unboxing results in a 3.5mm to coaxial adapter, a protective cover and an USB Type-C cable – the rubberized cover has a white-dotted pattern.

The unit comes inside white colored packaging with a minimalist design and size inline with many smartphones.

gramophone-25660 3.75/5



The FiiO M9 is built in a single piece without seams nor disrupting connections between sections.

FiiO has opted for an all new design of the body on the FiiO M9, the left side of the unit has a rounded shape to naturally-adapt to the right-hand fingers while holding the device. On the contrary, the right edge of the M9 has rectangular angles resulting in a flat edge that provides a perfect area to place the thumb while using the device.

This is a new shape that has never been seen before on any other FiiO DAP and that provides a well-thought and optimized ergonomic design.

With dimensions of 106mm×60mm×13.3mm, the FiiO M9 has a footprint much smaller than most modern large-sized smartphones (but thicker).

The bottom section of the device (right below the screen) holds a FiiO logo with an RGB light that indicates the status of the device by changing it’s color – the brightness of the LED light has 20 levels that can be manually set.


FiiO M9
FiiO M9
FiiO M9
FiiO M9


FiiO M9
FiiO M9


Operation & Control

The FiiO M9 has 5 physical buttons that are placed along the curved left edge of the device and a touch sensitive screen with 5-finger and gestures supprt

On the “Design” section we highlighted the benefits of the new body design of the FiiO M9. In addition to the ergonomic improvements of the new body shape, the physical buttons have been carefully placed on the left edge of the unit with an aligned position where the index finger, middle finger and ring finger naturally-sit. In other words, the index finger sits on the volume wheel, the middle finger on the Play/Pause button and the ring finger on the Previous/Next Track button.

By having a fully touch sensitive screen and an Android-based OS, the FiiO M9 is intuitive to use with no learning curve for anyone who has previously used a smartphone and/or tablet. At the same time, the responsiveness, scrolling and overall operation is fluid with no hiccups nor lag.

The physical buttons allow an easy to operate experience with the screen turned on or while in your pocket without seeing the screen.
These button can fully control the device:

Top Button:

  • Press and hold: Power on/off
  • Single press: Lock screen, turn screen on/off


  • One position rotation: 1 volume step up or down (clockwise= vol +; counterclockwise= vol -) – 120 volume steps are available

Middle Button:

  • Single press: Play/Pause – the FiiO logo on the lower end of the device will light Blue when music is playing.

Double Bottom Buttons:

  • Upper button single press: Previous track
  • Lower button single press: Next track

Moreover, the touch sensitive screen allows the same full operative control of the unit, as the physical buttons through the touch buttons on the FiiO Music app.

Touch Screen Gestures:

  • Swipe up from bottom-left: Previous screen
  • Swipe up from bottom-right: Back to Home screen

Buttons Customization:

The physical buttons can be activated/deactivated through an in-app setting under the “Key-lock Settings” option.

The customized activation/deactivation of the buttons will be effective only while the the screen is locked.


FiiO M9 buttons controls
FiiO M9 buttons controls


Battery Life

The FiiO M9 holds a 2350mAh lithium-polymer rechargeable battery that allows the unit to provide up to 30 hours of continuous playback time on a single charge (on BT mode) and 45 days of deep sleep time – on a wired connection through the 3.5mm jack, the DAP can reach more than 10 hours of playtime.

The battery charge level of the FiiO M9 can be seen on the top right edge of the screen through the battery readings showed in percentage and with a battery icon.

How to charge the FiiO M9:

To charge the FiiO M9, it has to be plugged through the USB Type-C connector with the included cable – the charging time is 2 hours (aprox.).

The FiiO M9 should be, ideally, charged with a power adapter that provides an output of 5V and 2A.


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FiiO M9 connections
FiiO M9 connections


Construction & Build

The FiiO M9 has a a fully-aluminum build (body) with an unibody design (for example, the FiiO M3K is another FiiO DAP with an unibody metal build).

The screen has a reinforced finish to lower the chances of breakage and scratching.

The music player is ruggedly constructed with a durable feel that inspires a trusty lasting life.


FiiO M9
FiiO M9



The FiiO M9 screen is a 3.2 inches LG IPS multi-touch one with 16 million colors, a resolution of 800×480 and a pixel density of 292 PPI – the pixel density of the FiiO M9’s screen is more than thrice of a 50 inches 4K TV and over 4 times the pixels per inch of a 32” 1080p Monitor.

The IPS screen of the M9 has no pronounced viewing angle issues nor color distortion and is free of color negativization problems.


FiiO M9
FiiO M9



The customized Android OS version on the FiiO M9 has also a custom user interface.

The home/main screen of this custom UI has 9 main menu categories/apps (as of firmware v 1.0.1): FiiO Music, File Management, Gallery, Technical Support, Settings, KKBOX, TIDAL, NetEase Music, MOOV.

  • FiiO Music: FiiO’s proprietary music player app.
  • File Management: allows to navigate the contents of the internal storage and of the micro SD card. A Song, Picture and Document filter is available on the top of the app screen.
  • Gallery: allows to view/navigate the photos/images contained in SD card and internal storage.
  • Technical Support: gives access to Firmware Update options, FAQ, Quick Start Guide and contact information.
  • Settings: access to further settings of the device, divided in 7 main categories: Wi-Fi, Bluetooth, Audio, LED, Key-lock Settings, General, Factory data reset.
  • KKBOX: Taiwanese leading app for music streaming in Asiatic countries
  • TIDAL: music streaming app
  • NetWase Music: music streaming service for China
  • MOOV: music streaming app

Quick access links are available from the top menu, you can access it by swiping down the top bar (Android standard access). The top quick-bar gives access to: Settings, slider brightness control, Wi-Fi turn on/off, Bluetooth turn on/off, audio output mode, USB mode (storage, USB DAC), gain (low, high), “Filter Settings” (quick access to the full Audio settings menu)

The top-left edge of the screen informs the volume level, the center section shows the clock and on the right you will see the SD card inserted confirmation icon and a battery charge level in percentage (also with a battery icon)


Formats Compatibility

The FiiO M9 has two AKM AK4490EN DACs (one per channel) – with the M9 you are getting the same DACs of the FiiO X5 3rd Gen. and the FiiO Q5 Amp (flagship portable amplifier from FiiO).

These double DACs are capable of decoding and reproduce the following file formats:

  • DSD: DSD128, 64(“.iso”“.dsf”,“.dff”)
  • APE(Fast): 192 kHz/24 bit
  • APE(Normal): 192 kHz/24 bit
  • APE (High): 192 kHz/24 bit
  • APE (Extra High): 48 kHz/24 bit
  • APE (Insane): 48 kHz/24 bit
  • FLAC: 192 kHz/24 bit
  • WAV: 192 kHz/32 bit
  • Aiff: 192 kHz/24 bit
  • Aif: 192 kHz/24 bit
  • WMA Lossless: 96 kHz/24 bit
  • Apple Lossless: 192 kHz/24 bit
  • MP3
  • OGG
  • M4A
  • AAC
  • ALAC
  • ISO
  • DFF
  • DSF
  • CUE
  • LRC – for lyrics


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The FiiO M9 has a micro SD card slot on the left edge and 3 connectors on the bottom edge.

The ports/connectors available are: a 3.5mm/line-out/coaxial output (the coaxial output needs the 3.5mm to coaxial adapter included), a 2.5mm TRRS balanced output and an USB Type-C connector with audio-out and USB DAC functionality.

One of the major differences of the FiiO M9 with many other portable music players in this price range is the balanced output connector and the extra connections.

FiiO is always transparent and clear about the specs of their devices. For the ports output of the FiiO M9, the brand specifies the following the technical specifications:

Line-out specifications

  • THD+N <0.002%(1kHz/10kΩ)
  • SNR ≥117dB (A-weighted)
  • Frequency response 5Hz~80 kHz(-3dB)
  • Noise floor <5uV
  • Channel separation >105dB
  • Line level 2V

3.5mm Headphone out specifications

  • Output impedance <2Ω
  • THD+N <0.002%(1kHz/32Ω)
  • Output power 1 ≥125mW(16Ω / THD+N<1%)
  • Output power 2 ≥170mW(32Ω /THD+N<1%)
  • Output power 3 ≥19mW(300Ω / THD+N<1%)
  • Separation >72dB
  • Frequency response 5Hz~80 kHz(-3dB)
  • Peak output voltage 6.5Vp-p
  • SNR ≥118dB (A-weighted)
  • Noise floor <5uV

Balanced Headphone out specifications(2.5mm port)

  • Output impedance <2Ω
  • THD+N <0.002%(1kHz/32Ω)
  • Output power 1 ≥125mW(16Ω / THD+N<1%)
  • Output power 2
    ≥195mW(32Ω /THD+N<1%,balanced turbo off)
    ≥220mW(32Ω /THD+N<1%,balanced turbo on)
  • Output power 3
    ≥24mW(300Ω / THD+N<1%,balanced turbo off)
    ≥77mW(300Ω / THD+N<1%,balanced turbo on)
  • Separation >98dB
  • Frequency response 5Hz~80 kHz(-3dB)
  • Peak output voltage 7.07Vp-p
  • SNR ≥113dB (A-weighted)
  • Noise floor <10uV


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FiiO M9 ports
FiiO M9 ports
FiiO M9 card slot
FiiO M9 card slot



Putting the FiiO M9 through our sound tests, the DAP showed a remarkably flat frequency response that preserves the true sound signature of headphones without boosting nor recessing any range of the audio spectrum.

Furthermore, there is no coloration of the sound without any noticeable warming nor cooling of the original sound identity.

In addition to this, we measured each of the EQ presets of the FiiO M9 and the device in every mode (USB DAC, Bluetooth receiver) – measurements available at the bottom of the review article.

Our EQ frequency response measurements revealed a precise and accurate representation of the EQ preset information on every band and an effective response. As well, our FiiO M9 frequency response measurements under USB DAC and Bluetooth receiver modes resulted in a neutral and flat response.

The FiiO M9 technical specifications list a frequency response of 5Hz-80,000Hz, with a noise floor of <5uV (<10uV for the 2.5mm connection), SNR of 118dB (3.5mm connection) and output impedance of <2Ω.

FiiO recommends to use the FiiO M9 with headphones having an impedance between 16Ω and 300Ω. Most popular headphones sit in this impedance range and will be no challenge for the FiiO M9. Nonetheless, this does not mean that you cannot use headphones with higher impedance with the M9 – for example, as we have seen through out our FiiO M3K review, the little DAP had a recommended impedance topping at 100Ω but had no issues driving Beyerdynamic headphones with an impedance of 250Ω.

If set to High Gain and the output power of the FiiO M9 reaches ≥220mW (32Ω / 2.5mm balanced output / SNR ≥113dB) and ≥77mW (300Ω / 2.5mm balanced output / SNR ≥113dB), which is quite impressive for such a small portable device.

Additional Audio Options/Settings

The FiiO M9 hides a plethora of audio customization options and settings under the “Audio” submenu (under the “Settings” main menu). Some of them include:

  • Output selection: PO, LO, SPDIF
  • SPDIF output: DoP (DSD over PCM), D2P (DSD to PCM)
  • Gain: low, high
  • Lowpass filter mode (5 options available)
  • Wireless playback quality: codec can be selected among 6 options
  • Balance: 9 levels
  • In-line remote on/off
  • Balance boost on/off
  • Adjustable volume at LO on/off
  • USB DAC on/off


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FiiO M9 with Sennheiser
FiiO M9 with Sennheiser



The FiiO M9 has a bundled 10-band equalizer in the FiiO Music app. The 10 bands are: 32Hz, 62Hz, 125Hz, 250Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz and 16kHz.

Each one of the bands of the graphical EQ cover a range from +6dB to -6dB.

The EQ has 9 different presets: Pop, Rock, Dance, Blues, Metal, Vocal, Classical, Jazz and a custom EQ that can be manually set.


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FiiO M9 next to FiiO E12
FiiO M9 next to FiiO E12
FiiO M9 next to FiiO E12
FiiO M9 next to FiiO E12


FiiO Music App

The music stored in your micro SD card and/or in the internal storage of the FiiO M9 is played through FiiO’s proprietary music playing, the: FiiO Music (v1.0.6 as of the M9’s firmware version 1.0.1)

The FiiO Music offers a good amount of features such as:

  • 10 band EQ
  • Gapless playback
  • Off timer
  • Library scanner
  • Fixed volume
  • ReplayGain
  • USB output mode: DoP, D2P
  • HWA (audio streamed via LDHC codec)
  • WiFi song transferring
  • DLNA
  • Lockscreen album photo on/off
  • Lockscreen lyrics on/off

Songs can be accessed and sorted by:

  • All songs
  • Artist
  • Album
  • Playlists
  • Genre
  • Folder
  • Recently played
  • Most played
  • Recently added

The music player screen shows various information of the current track, including: cover image, song name, artist name, elapsed time, track duration and number of track (x/x).

Additional details and options can be revealed by tapping on the cover image. The extra details shown are: file name, album name, artist name, file format, kHz, bits, kbps; while the additional options are: EQ, playback mode, Add to playlist, Add to favorites, Delete (deletes the track), Track Info.

The “Track Info” option unveils a full sheet with: Title, Album, Artist, Genre, Year, Track #, Length, File Size, Format, Channels, Bitrate, Sample rate, Path.

The first time that the FiiO Music App is opened, it will guide you through the basic operation of the app. The app will suggest to do a music scan on it’s first use. The scan screen will let you scan all or to select specific folder/s – while scanning you will have a live feedback of the amount of tracks that are being found and added to the music library.

Third-party apps support:

As the FiiO M9 is an Android-based device, some of our readers might be wondering if it is possible to install other apps beside the ones bundled with the device.

The answer is: yes, but with restrictions. Only apps that are whitelisted by FiiO are installable, as of firmware v 1.0.1 the apps that are supported for installation are: Spotify, Qobuz, Roon and Deezer.

How to install apps on the FiiO M9:

To install third-party apps on the FiiO M9, users will need to download the apk of the app wanted, copy it to a micro SD card and install it from the “File Management” of the FiiO M9 – as the device does not have google’s “Play Store”.



The firmware of the FiiO M9 can be upgraded through it’s micro SD card or via OTA while connected to a WiFi network.

OTA upgrades should start automatically (when available) but can be also manually forced to search for any new updates by going to “Technical Support”–>”Firmware Update”

UPDATE: A new firmware version 1.0.2 has been released by FiiO fixing some bugs and adding more whitelisted apps such as JOOX, ES file manager, Bandcamp and Sony Headphones app.

Full firmware post, fixes and improvements- as reported by FiiO:

The following changes and improvements have beenmade to the FW1.0.2 compared to the FW1.0.1 on M9:
1. Added some more 3rd-party apps to white list,including JOOX, ES file manager, Bandcamp, and Sony headphones;
Note: You can copy the apk file of the qualifiedapp to the M9’s internal memory or external Micro SD card, then open the FileManagement app, locate and click on the apk file to install it.
2. Added “Maximum volume setting” and “Fixedvolume setting” (in Settings -> Audio);
Maximum volume setting: The volume only canadjusted to the set value.
Fixed volume setting: it will take effect once itsset, and the volume will be changed to the set value every time when devicestarts.
3. Added firmware update change log (can be viewedby next update);
4. Added the function of auto entering the Nowplaying interface;
Note: The player will automatically switch to theNow playing menu after selecting a song to play.
5. Fixed issue where the length of the certainMP3 tracks was displayed incorrectly;
6. Fixed issue where the tracks downloaded by3rd-party apps could not be scanned;
7. Fixed issue where the player could not enterMain menu when certain build-in apps, such as Gallery, was stopped;
8. Fixed issue where the controlling area of theplay progress bar might be too wide, which might cause misoperations;
9. Fixed issue where there would be prompt aboutrepairing the MTP driver disk after connecting with the computer;
10. Fixed the noise issue when using the playeras a USB DAC for the computer and then playing 176kHz or 192kHz via Bluetooth;
11. Improved the coulometer display;
12. Updated the Tidal app version;
13. Miscellaneous bug fixes;

Latest FiiO M9 Firmware download: M9-FW1.0.2firmware – Download: click here

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Scores Scores

FiiO M9 Scores

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Frequency Response (raw)

FiiO M9 Frequency Response Curve

FiiO M9 frequency response curve - all modes USB DAC - Wired - Bluetooth with 1MORE Quad Driver
FiiO M9 frequency response curve – all modes USB DAC – Wired – Bluetooth with 1MORE Quad Driver

FiiO M9 Frequency Response Curve – EQ Presets

Purple curve= EQ OFF

FiiO M9 frequency response curve - no EQ vs EQ Presets with 1MORE Quad Driver
FiiO M9 frequency response curve – no EQ vs EQ Presets with 1MORE Quad Driver
FiiO M9 buttons with case
FiiO M9 buttons with case

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FiiO M9 Technical Specifications

TypeDAP/USB DAC/Bluetooth Amp
Screen size3.2 inches
Music Player/DAC/DAPYes
DSDYes, native 128/64
Max Card Size2 TB
Battery30 hours (BT)
Screen resolution800×480
Frequency Response5Hz-80KHz
PlugStereo mini plug, 2.5mm balanced, USB audio
WeightApprox. 133g
BluetoothYes, v4.2

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FiiO M9 Full technical specifications

reported by FiiO

Main Unit
Name / Model No. M9
Operating System Customized
CPU model Exynos 7270 14nm
No. of cores 2
CPU operating frequency 1GHz
DAC AK4490EN×2
Keyboard Virtual QWERTY keyboard
Input method Multi-touch screen
Special features LDAC,HWA, Gesture operation,WiFi Streaming,RGB indicator for different formats,Bi-directional Bluetooth,8-layer HDI PCB
User interface Customized/FiiO Music
Chips used SoC: Samsung Exynos 7270,DAC:AK4490EN*2,FPGA:A3P030,LPF:OPA1612,BUF:OPA1622*2
Bluetooth chip:SAMSUNG S5N5C10B01-6330

WiFi 2.4G,WiFi transmission supported
Bluetooth 4.2
USB TYPE C Two-way USB2.0
Bluetooth transmit LDAC/aptX/aptX HD/SBC(Available when playing on M9 or using M9 as USB DAC)
HWA(LHDC) Available when playing on M9 or using M9 as USB DAC Bluetooth receive
SBC/LDAC to be supported
AirPlay To be supported
DLNA Supports Windows for now, will support more in the future
FLYLINK To be supported

Display screen
Display size 3.2 inches
Number of colours 16M
Display type LG IPS screen
Viewable angle Full-view
Resolution 480×800
Pixel density(PPI) 292
Touchscreen 5-finger multi-touch

Storage expansion type Micro SD card
ROM available to user 2GB
Maximum storage expansion Theoretically 2TB (only one micro SD card slot)

Buttons and ports
Buttons Physical button+Side volume scroll+Touch screen
Button customization N/A
Headphone out (PO) 3.5 mm headphone jack+2.5mm balanced headphone jack
USB Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio)
Line out (LO) 3.5 mm port(shared PO)
SPDIF output 3.5mm port(shared PO)

Color Silver(might have more colors coming out)
Dimensions 60mm*106mm*13.3mm
Weight about 133g
Volume control 120 steps +/- button control
Recommended headphone impedance 16~300Ω
Equalizer 10-band EQ (±6dB), 9 presets+custom preset
Treble control N/A
Bass boost N/A
Balance control ±5dB
Gain control L/H
USB DAC Asynchronous 192kHz/32bit
USB Audio DSD64/128,DoP/D2P

Power specifications
USB power adapter DC 5V/2A recommended
Battery capacity 2350mAh Li-polymer battery
Charging indication Large charging icon shows on display when it’s off, small charging icon shows on upper right of display when it’s on
Charging time <2h(DC5V/2A)
Battery indication Yes (accurate battery % readings)
Deep sleep time 45 days

Battery Life & Test Conditions
3.5mm headphone output:>10h
Volume 46 Load M3 open earbuds (27 Ω)
Screen OFF Test File MP3 44.1kHz/16bit
2.5mm balanced output:>9h
Volume 48 Load M3 open earbuds (27 Ω)
Screen OFF Test File MP3 44.1kHz/16bit
Bluetooth output:>30h(SBC)
Volume 60 Load BTR1+FH1
Screen OFF Test File MP3 44.1kHz/16bit
Firmware Upgrade

Supports both via zip file and OTA

(*The product uses GPLv2 compliant firmware.)
Font size N/A
Firmware Upgrade Supported Third-party apps support
Supports installation of APP(Spotify, Qobuz, Roon, Deezer) in the white list

Line output specifications
THD+N <0.002%(1kHz/10kΩ) SNR ≥117dB (A-weighted)
Frequency response 5Hz~80 kHz(-3dB) Noise floor <5uV
Channel separation >105dB Line level 2V
Headphone out specifications 1(3.5mm port)
Output power 1 ≥125mW(16Ω / THD+N<1%) Output impedance <2Ω
Output power 2 ≥170mW(32Ω /THD+N<1%) THD+N <0.002%(1kHz/32Ω)
Output power 3 ≥19mW(300Ω / THD+N<1%) Separation >72dB
Frequency response 5Hz~80 kHz(-3dB) Peak output voltage 6.5Vp-p
SNR ≥118dB (A-weighted) Noise floor <5uV
Headphone out specifications 2(2.5mm port)
Output power 1 ≥125mW(16Ω / THD+N<1%) Output impedance <2Ω
Output power 2 ≥195mW(32Ω /THD+N<1%,balanced turbo off)
≥220mW(32Ω /THD+N<1%,balanced turbo on) THD+N <0.002%(1kHz/32Ω)
Output power 3 ≥24mW(300Ω / THD+N<1%,balanced turbo off)
≥77mW(300Ω / THD+N<1%,balanced turbo on) Separation >98dB
Frequency response 5Hz~80 kHz(-3dB) Peak output voltage 7.07Vp-p
SNR ≥113dB (A-weighted) Noise floor <10uV

File format support
Lossless: DSD:DSD64,128(iso”“.dsf”,“.dff”)
APE(Fast): 192 kHz/24 bit
APE(Normal): 192 kHz/24 bit
APE (High): 192kHz/24 bit
APE (Extra High): 48kHz/24 bit
APE (Insane): 48kHz/24 bit
FLAC: 192 kHz/24 bit
WAV: 192 kHz/64 bit
Aiff:192 kHz/24 bit
Aif:192 kHz/24 bit
WMA Lossless: 96 kHz/24 bit
Apple Lossless: 192 kHz/24 bit
Lossless: MP3,OGG,WMA,AAC…


FiiO M9 Photos

We highly discourage anyone from trying to apply our testings to your own earphones, the risk of damaging or permanently breaking your iems is absolutely probable to happen. With our standardized equalization and amplification tests we push the limits of the earphones to the extreme. If anyway you decide to do so, we cannot be held responsible of the damage done to your equipment. Do it at your own risk.

meze 99classics, meze 99neo, 1more quad-driver, fiio m9

FiiO M9