Distortion curve 1

 

Test condition: Play -5 dB sinusoidal signal, 3.5mm headphone output (32Ω loaded)

Frequency response curve 1

 

Test condition: Play -5 dB sinusoidal signal, 3.5mm headphone output (32Ω loaded)

Blue curve: Left channel; Red curve: Right channel

Distortion curve 2

 

Test condition: Play -5 dB sinusoidal signal, 3.5mm line output (10kΩ loaded)

Distortion curve 3

 

Test condition: Play -5 dB sinusoidal signal, 2.5mm TRRS balanced output (32Ω loaded)

Main Unit
Name / Model No. M11 OS Customized Android7.0
CPU model Exynos 7872 14nm No. of cores 6
CPU operating frequency 2GHz(A73×2),1.6GHz(A53×4) DAC AK4493EQ×2
Keyboard Virtual QWERTY keyboard Input method Multi-touch screen
Special features Android 7.0,No SRC restriction,All to DSD,2.5+3.5+4.4 output,Gesture control User interface Customized/FiiO Music
Chips used SoC: Samsung Exynos 7872,DAC:AK4493EQ*2,FPGA:A3P030,LPF:OPA1642×2,AMP:OPA926*2
Bluetooth chip:SAMSUNG S5N5C10B01-6330
Connectivity
WiFi 2.4/5G,WiFi transmission supported Bluetooth 4.2
USB TYPE C Two-way USB2.0 Bluetooth transmit LDAC/aptX/aptX HD/SBC
HWA(LHDC) Available when playing on M11 or using M11 as USB DAC Bluetooth receive SBC/LDAC (support in future firmware)
AirPlay Supported DLNA Supports Windows for now, will support more in the future
FiiO Link Supported NAS UPNP protocol supported
Display screen
Display size  5.15 inches Number of colours 16M
Display type IPS Hi-Res incell screen Viewable angle Full-view
Resolution 1440×720 Pixel density(PPI) 312
Touchscreen 10-finger multi-touch    
Storage
RAM 3GB ROM 32GB
Storage expansion type Micro SD crad ROM available to user About 25GB
Maximum storage expansion Theoretically 4TB (dual 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+4.4mm balanced headphone jack USB Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/Digital audio out (Usb Type C)
Line out (LO) 3.5 mm port(shared PO) SPDIF output 3.5mm port(shared PO),DSD64/128,384kHz/32bit,DoP/D2P
General
Color Black Dimensions 70.5mm*130mm*15.5mm
Weight About 211g Volume control 120 steps 
Recommended headphone impedance 16~150Ω (3.5mm headphone output) Equalizer 10-band EQ (±6dB), 9 presets+custom preset
16~300Ω (2.5mm+4.4mm balanced output)
Treble control N/A Bass boost N/A
Balance control ±5dB Gain control L/H
USB DAC  Asynchronous 384kHz/32bit Digital audio out (Usb Type C) DSD64/128/256,768kHz-32bit
Power specifications
USB power adapter QC2.0/3.0 quick charger,PD2.0 charger,DC 12V/1.5A、9V/2A、5V/2A recommended Battery capacity 3800mAh 3.8V Li-polymer battery supporting quick charge
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 <2.5h(DC 12V/1.5A)
<3h(DC 5V/2A)
Battery indication Yes (accurate battery % readings) Deep sleep time 50 days
Battery Life & Test Conditions
3.5mm headphone output:>13h
Volume 60 Load M3 open earbuds (27 Ω)
Screen OFF Test File MP3 44.1kHz/16bit
EQ OFF All To DSD OFF
2.5mm+4.4mm balanced output:>9h
Volume 49 Load 32 Ω
Screen OFF Test File MP3 44.1kHz/16bit
EQ OFF All To DSD  OFF 
Bluetooth output:>48h(LDAC)
Volume 60 Load BTR3+FH1
Screen OFF Test File MP3 44.1kHz/16bit
Others
Firmware Upgrade Supports both via zip file and OTA Font size Supported
Clock Function Supported Third-party apps support Supports any app
Line output specifications
THD+N <0.001%(1kHz/10kΩ) SNR ≥115dB (A-weighted)
Frequency response 10Hz~90 kHz(-3dB) Noise floor  <6uV(20k low pass)
Channel separation >108dB (1kHz/10kΩ) Line level 1.95V (10kΩ)
Headphone out specifications 1(3.5mm port)
Output power 1 ≥255mW(16Ω / THD+N<1%) Output impedance <1Ω (32Ω)
Output power 2 ≥195mW(2.5V)(32Ω /THD+N<1%) THD+N <0.003%(1kHz/32Ω)
Output power 3 ≥22mW(300Ω / THD+N<1%) Separation >72dB (1kHz/32Ω)
Frequency response 10Hz~90 kHz(-3dB) Noise floor <5uV(20k low pass)
SNR ≥118dB (A-weighted, 32Ω)    
Headphone out specifications 2(2.5mm+4.4mm balanced output)
Output power 1 ≥480mW(16Ω / THD+N<1%) Output impedance <2Ω (32Ω)
Output power 2 ≥550mW(4.2V)(32Ω /THD+N<1%) THD+N <0.002%(1kHz/32Ω)
Output power 3 ≥88.5mW(300Ω /THD+N<1%) Separation >107dB (1kHz/32Ω)
Frequency response 10Hz~90 kHz(-3dB) Noise floor <7uV(20k低通)
SNR ≥118dB (A-weighted, 32Ω)    
File formats support
Lossless: DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),dst
DXD:352.8K
APE FAST/High/Normal:384kHz/24bit(MAX)
APE Extra High:192kHz/24bit(MAX)
APE Insane:96kHz/24bit(MAX)
Apple Lossless:384kHz/32bit(MAX)
AIFF:384kHz/32bit(MAX)
FLAC:384kHz/32bit(MAX)
WAV:384kHz/32bit(MAX)
WMA LOSSLESS:96kHz/24bit(MAX)
Lossy compression: MP3,OGG,WMA,AAC…