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
Connectivity
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
RAM 768MB ROM 4GB
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)
General
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
EQ OFF
2.5mm balanced output:>9h
Volume 48 Load M3 open earbuds (27 Ω)
Screen OFF Test File MP3 44.1kHz/16bit
EQ OFF
Bluetooth output:>30h(SBC)
Volume 60 Load BTR1+FH1
Screen OFF Test File MP3 44.1kHz/16bit
Others
Firmware Upgrade Supports both via zip file and OTA 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...