Model M9 M11 M11pro M15
CPU Exynos 7270 14nm Exynos 7872 14nm Exynos 7872 14nm Exynos 7872 14nm
CPU operating frequency 1GHz 2GHz(A73×2),1.6GHz(A53×4) 2GHz(A73×2),1.6GHz(A53×4) 2GHz(A73×2),1.6GHz(A53×4)
CPU No. of cores 2 6 6 6
DAC AK4490EN×2 AK4493EN×2 AK4497EN×2 AK4499EQ×2
Operating system Customized Customized Android7.0 Customized Android7.0 Customized Android7.0
Input method Multi-touch screen Multi-touch screen Multi-touch screen Multi-touch screen
Keyboard Virtual QWERTY keyboard Virtual QWERTY keyboard Virtual QWERTY keyboard Virtual QWERTY keyboard
Special features LDAC,HWA,Gesture operation,WiFi Streaming,RGB indicator for different formats,Bi-directional Bluetooth,8-layer HDI PCB Android 7.0,No SRC restriction,All to DSD,2.5+3.5+4.4 output,Gesture control Android 7.0,No SRC restriction,All to DSD,2.5+3.5+4.4 output,Gesture control Four independent system mode,Full formates BT receive, Professional ADC Volume Adjustment Mode, Fully Decode (8x) the Original MQA Files, Corning Gorilla Glass, Innovative multifunctional button, All to non-SRC, All to DSD 2.0,2.5+3.5+4.4 output,Gesture control 
User interface Customized/FiiO Music Customized/FiiO Music Customized/FiiO Music Android/Pure Music/SB DAC/Bluetooth Receiver
Chips used SoC: Samsung Exynos 7270,DAC:AK4490EN*2,FPGA:A3P030,LPF:OPA1612,BUF:OPA1622*2 SoC: Samsung Exynos 7872,DAC:AK4493EQ*2,FPGA:A3P030,LPF:OPA1642×2,AMP:OPA926*2 SoC: Samsung Exynos 7872,DAC:AK4497EQ*2,FPGA:A3P030,LPF:OPA1642×3,AMP:LMH6644*2,Volume IC : NJW1195 SoC:Exynos 7872,DAC:AK4499EQ*2,USB code:XMOS XUF208,BT receive:CSR8675,crystal oscillator:NDK Femtosecond crystal oscillator*2,AMP:OPA2211*2+OPA1622*4+OPA1612*4,FPGA:A3P030
Bluetooth chip:SAMSUNG S5N5C10B01-6330 Bluetooth chip:SAMSUNG S5N5C10B01-6330
WiFi 2.4G,WiFi transmission supported Bluetooth chip:SAMSUNG S5N5C10B01-6330 Bluetooth chip:SAMSUNG S5N5C10B01-6330 2.4G/5G,WiFi transmission supported
BT transmit version 4.2 4.2 4.2 4.2
Bluetooth transmit LDAC/aptX/aptX HD/SBC(Available when playing on M9 or using M9 as USB DAC) LDAC/aptX/aptX HD/SBC(Available when playing on M11 or using M11 as USB DAC) LDAC/aptX/aptX HD/SBC(Available when playing on M11 or using M11 as USB DAC) LDAC/HWA/aptX/aptX HD/SBC
BT receive version 4.2 4.2 4.2 5
Bluetooth receive SBC/LDAC SBC/LDAC SBC/LDAC SBC/AAC/aptX/aptX LL/aptX HD/LDAC
DLNA Supports Windows for now, will support more in the future Supports Windows for now, will support more in the future Supports Windows for now, will support more in the future Supports Windows for now, will support more in the future
USB TYPE C Two-way USB2.0 TYPE C Two-way USB2.0 TYPE C Two-way USB2.0 TYPE C Two-way USB2.0
AirPlay To be supported Supported Supported Supported
FiiO Link To be supported Supported Supported Supported
All to DSD N/A Supported Supported Supported
MQA N/A Supported Supported Supported
Screenshot with 3 fingers N/A Supported Supported Supported
Display size 3.2 inches 5.15 inches 5.15 inches 5.15 inches
Display type LG IPS screen IPS Hi-Res incell screen IPS Hi-Res incell screen IPS Hi-Res incell screen
Resolution 480×800 1440×720 1440×720 1440×720
Touchscreen 5-finger multi-touch 10-finger multi-touch 10-finger multi-touch 10-finger multi-touch
Number of colours 16M 16M 16M 16M
Viewable angle Full-view Full-view Full-view Full-view
Pixel density(PPI) 292 312 312 312
RAM 768MB 3GB 3GB 3GB
Storage expansion type Micro SD card Micro SD card x 2 Micro SD card Micro SD card
Maximum storage expansion Theoretically 2TB (only one micro SD card slot) Theoretically 4TB (with each micro SD card supporting 2TB) Theoretically 2TB (only one micro SD card slot) Theoretically 2TB (only one micro SD card slot)
ROM 4GB 32GB 64GB 64GB
ROM available to user 2GB About 25GB About 52GB About 52GB
Buttons Physical button+Side volume scroll+Touch screen Physical button+Side volume scroll+Touch screen Physical button+Side volume scroll+Touch screen Physical button+Analog ADC volume knob + mechanical lock HOLD switch+Touch screen
Headphone out (PO) 3.5 mm headphone jack+2.5mm balanced headphone jack 3.5 mm headphone jack+2.5mm balanced headphone jack+4.4mm balanced headphone jack 3.5 mm headphone jack+2.5mm balanced headphone jack+4.4mm balanced headphone jack 3.5 mm headphone jack+2.5mm balanced headphone jack+4.4mm balanced headphone jack
Line out (LO) 3.5 mm port(shared PO) 3.5 mm port(shared PO) 3.5 mm port(shared PO) 3.5 mm port(shared PO)
Button customization N/A N/A N/A Supported one-click to add to favorites, one-click to random next song, one-click to delete the currently playing song, one-click to switch to USB decoding mode, one-click to switch to Bluetooth receiving mode, etc.
USB Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio) Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio) Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio) Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio)
SPDIF output 3.5mm port(shared PO) 3.5mm port(shared PO),DSD64/128,384kHz/32bit,DoP/D2P 3.5mm port(shared PO),DSD64/128,384kHz/32bit,DoP/D2P 3.5mm port(shared PO),DSD64/128,384kHz/32bit,DoP/D2P
Color Black/Silver Black Black Black
Dimensions 60mm*106mm*13.3mm 70.5mm*130mm*15.5mm 70.5mm*130mm*16.5mm 134*75*18mm
Weight about 133g about211g about232g about307g
Volume control 120 steps +/- button control 120 steps +/- button control 120 steps +/- button control Analog volume knob control
Recommended headphone impedance 16~300Ω 16~300Ω 16~300Ω 16~600Ω 
Equalizer 10-band EQ (±6dB), 9 presets+custom preset 10-band EQ (±6dB), 9 presets+custom preset 10-band EQ (±6dB), 9 presets+custom preset 10-band EQ (±6dB), 9 presets+custom preset
Gain control L/H L/H L/H L/H
Over-ear Headphone mode N/A N/A N/A Supported
Balance control ±5dB ±5dB ±5dB ±5dB
USB DAC Asynchronous 192kHz/32bit Asynchronous 384kHz/32bit Asynchronous 384kHz/32bit 768kHz/32bit|DSD512
USB Audio DSD64/128,DoP/D2P DSD64/128/256,384kHz/32bit,DoP/D2P/Native DSD64/128/256,384kHz/32bit,DoP/D2P/Native DSD64/128,384kHz/32bit,DoP/D2P/Native
USB power adapter DC 5V/2A recommended QC2.0/3.0 quick charger,PD2.0 charger,DC 12V/1.5A、9V/2A、5V/2A recommended QC2.0/3.0 quick charger,PD2.0 charger,DC 12V/1.5A、9V/2A、5V/2A recommended QC2.0/3.0 quick charger,PD2.0 charger,DC 12V/1.5A、9V/2A、5V/2A recommended
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 Large charging icon shows on display when it's off, small charging icon shows on upper right of display when it's on Large charging icon shows on display when it's off, small charging icon shows on upper right of display when it's on Large charging icon shows on display when it's off, small charging icon shows on upper right of display when it's on
Battery indication Yes (accurate battery % readings) Yes (accurate battery % readings) Yes (accurate battery % readings) Yes (accurate battery % readings)
Battery capacity 2350mAh Li-polymer battery 3800mAh 3.8V Li-polymer battery supporting quick charge 4370mAh 3.8V Li-polymer battery supporting quick charge 7490mAh 3.8V Li-polymer battery supporting quick charge
Charging time <2h(DC5V/2A) <2.5h(DC 12V/1.5A) <2.5h(DC 12V/1.5A) <3.5h(DC 12V/1.6A)
Deep sleep time 45 days 50 days 55 days 75 days
Battery life 1 3.5mm headphone output:>10h 3.5mm headphone output:>13h 3.5mm headphone output:>9.5h 3.5mm headphone output:>15h
Screen OFF OFF OFF OFF
EQ OFF OFF OFF OFF
Load M3 open earbuds (27 Ω) M3 open earbuds (27 Ω) M3 open earbuds (27 Ω) M3 open earbuds (27 Ω)
Test File MP3 44.1kHz/16bit MP3 44.1kHz/17bit MP3 44.1kHz/17bit MP3 44.1kHz/17bit
Battery life 2 2.5mm balanced output:>9h 2.5mm balanced output:>9h 2.5mm balanced output:>10h 2.5mm balanced output:>9h
Volume 48 49 49 49
Screen OFF OFF OFF OFF
EQ OFF OFF OFF OFF
Load M3 open earbuds (27 Ω) M3 open earbuds (27 Ω) M3 open earbuds (27 Ω) M3 open earbuds (27 Ω)
Test File MP3 44.1kHz/16bit MP3 44.1kHz/16bit MP3 44.1kHz/16bit MP3 44.1kHz/16bit
Firmware Upgrade Supports both via zip file and OTA Supports both via zip file and OTA Supports both via zip file and OTA Supports both via zip file and OTA
Clock Supported Supported Supported Supported
Font size Not supported supported supported Supported
Preinstalled Preinstalled:FiiO Music, Netease Music, MOOV, Tidal, KKBOX Preinstalled:FiiO Music,ES File Bbrowser,Chrome Bbrowser Preinstalled:FiiO Music,ES File Bbrowser,Chrome Bbrowser Preinstalled:FiiO Music,ES File Bbrowser,Chrome Bbrowser
Third-party apps APP whitelist:Spotify、Qobuz、Roon、Deezer,QQ Music、Xiami Music、JOOX、ES file manager、Himalaya (copy theapk file to Micro SD card or internal storage to install) Supports any app Supports any app Supports any app
Line output specifications    
THD+N <0.002%(1kHz/10kΩ) <0.001%(1kHz/10kΩ) <0.0006%(1kHz/10kΩ) <0.0004%(1kHz/10kΩ)
Frequency response 5Hz~80 kHz(-3dB) 10Hz~90 kHz(-3dB) 5Hz~86kHz(-3dB) 20Hz~90kHz(-4dB)
Channel separation >105dB >108dB >108dB >107dB
SNR ≥117dB (A-weighted) ≥115dB (A-weighted) ≥119dB (A-weighted) ≥121dB (A-weighted)
Noise floor <5uV <6uV(20k low pass) <2μV <1.9μV
Line level 2V 1.95V 1.95V 2.1V
Headphone out specifications 1(3.5mm port)  
Output power 1 ≥125mW(16Ω / THD+N<1%) ≥255mW(16Ω / THD+N<1%) ≥294mW(16Ω / THD+N<1%) ≥285mW(16Ω / THD+N<1%)
≥405mW(Over-ear Mode/16Ω / THD+N<1%)
Output power 2 ≥170mW(32Ω /THD+N<1%) ≥195mW(2.5V)(32Ω /THD+N<1%) ≥200mW(32Ω /THD+N<1%) ≥215mW(32Ω /THD+N<1%)
≥490mW(Over-ear Mode/32Ω /THD+N<1%)
Output power 3 ≥19mW(300Ω / THD+N<1%) ≥22mW(300Ω / THD+N<1%) ≥22mW(300Ω / THD+N<1%) ≥31mW(300Ω / THD+N<1%)
≥70mW(Over-ear Mode/300Ω / THD+N<1%)
Frequency response 5Hz~80 kHz(-3dB) 10Hz~90 kHz(-3dB) 5Hz~86kHz(-3dB) 20Hz~90kHz(-4dB)
SNR ≥118dB (A-weighted) ≥118dB (A-weighted) ≥118dB (A-weighted) ≥121dB(A-weighted)
≥119dB(Over-ear Mode/A-weighted)
Output impedance <2Ω <1Ω ≤1.1Ω ≤1.4Ω
THD+N <0.002%(1kHz/32Ω) <0.003%(1kHz/32Ω) <0.00084%(1kHz/32Ω) <0.0005%(1kHz/32Ω)
Separation >72dB >72dB >72dB(1kHz/32Ω) >77dB(1kHz/32Ω)
>113dB(No load) >115dB(No load)
Noise floor <5uV <5uV(20k low pass) <3μV <2.1μV
<3μV(Over-ear Mode)
Headphone out specifications 2(2.5mm port)  
Output power 1 ≥125mW(16Ω / THD+N<1%) ≥480mW(16Ω / THD+N<1%) ≥460mW(16Ω / THD+N<1%) ≥420mW(16Ω / THD+N<1%)
≥370mW(Over-ear Mode/16Ω / THD+N<1%)
Output power 2 ≥195mW(32Ω /THD+N<1%,balanced turbo off) ≥550mW(4.2V)(32Ω /THD+N<1%) ≥550mW(32Ω /THD+N<1%) ≥635mW(4.2V)(32Ω /THD+N<1%)
≥800mW(Over-ear Mode/16Ω / THD+N<1%)
≥220mW(32Ω /THD+N<1%,balanced turbo on)
Output power 3 ≥24mW(300Ω / THD+N<1%,balanced turbo off) ≥88.5mW(300Ω /THD+N<1%) ≥88.5mW(300Ω /THD+N<1%) ≥120mW(300Ω /THD+N<1%)
≥280mW(Over-ear Mode/16Ω / THD+N<1%)
≥77mW(300Ω / THD+N<1%,balanced turbo on)
Frequency response 5Hz~80 kHz(-3dB) 10Hz~90 kHz(-3dB) 5Hz~86kHz(-3dB) 20Hz~90kHz(-3dB)
SNR ≥113dB (A-weighted) ≥118dB (A-weighted) ≥119dB (A-weighted) ≥122dB(A-weighted)
≥118dB(Over-ear Mode/A-weighted)
Output impedance <2Ω <2Ω ≤2.4Ω ≤3Ω
THD+N <0.002%(1kHz/32Ω) <0.002%(1kHz/32Ω) <0.00108%(1kHz/32Ω) <0.0006%(Over-ear Mode/1kHz/300Ω)
Separation >98dB >107dB >108dB(1kHz/32Ω) >103dB(1kHz/32Ω)
>115dB(No load) >118dB(No load)
Noise floor <10uV <7uV(20k low pass) <4μV <3.8μV
<5.2μV(Over-ear Mode)
File format support  
Lossless: DSD:DSD64,128(iso”“.dsf”,“.dff”) DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),dst DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),dst DSD:DSD64/128/256(“.iso”,“.dsf”,“.dff”),dst
APE(Fast): 192 kHz/24 bit DXD:352.8K DXD:352.8K DXD:352.8K
APE(Normal): 192 kHz/24 bit APE FAST/High/Normal:384kHz/24bit(MAX) APE FAST/High/Normal:384kHz/24bit(MAX) APE FAST/High/Normal:384kHz/24bit(MAX)
APE (High): 192kHz/24 bit APE Extra High:192kHz/24bit(MAX) APE Extra High:192kHz/24bit(MAX) APE Extra High:192kHz/24bit(MAX)
APE (Extra High): 48kHz/24 bit APE Insane:96kHz/24bit(MAX) APE Insane:96kHz/24bit(MAX) APE Insane:96kHz/24bit(MAX)
APE (Insane): 48kHz/24 bit Apple Lossless:384kHz/32bit(MAX) Apple Lossless:384kHz/32bit(MAX) Apple Lossless:384kHz/32bit(MAX)
FLAC: 192 kHz/24 bit AIFF:384kHz/32bit(MAX) AIFF:384kHz/32bit(MAX) AIFF:384kHz/32bit(MAX)
WAV: 192 kHz/64 bit FLAC:384kHz/32bit(MAX) FLAC:384kHz/32bit(MAX) FLAC:384kHz/32bit(MAX)
Aiff:192 kHz/24 bit WAV:384kHz/32bit(MAX) WAV:384kHz/32bit(MAX) WAV:384kHz/32bit(MAX)
Aif:192 kHz/24 bit WMA LOSSLESS:96kHz/24bit(MAX) WMA LOSSLESS:96kHz/24bit(MAX) WMA LOSSLESS:96kHz/24bit(MAX)
WMA Lossless: 96 kHz/24 bit      
Apple Lossless: 192 kHz/24 bit      
Lossy compression: MP3,OGG,WMA,AAC… MP4,OGG,WMA,AAC… MP4,OGG,WMA,AAC… MP4,OGG,WMA,AAC…