Distortion curve 1

Test condition: Play -3 dB sinusoidal signal,High Gain,48kHz 20Hz-20kHz,  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)

Distortion curve 2

Test condition: Play -3 dB sinusoidal signal,High Gain,48kHz 20Hz-20kHz,  line output (10Ω loaded)

Distortion curve 3

Test condition: Play -3 dB sinusoidal signal,High Gain,48kHz 20Hz-20kHz,  TRRS balanced output (32Ω loaded)

Name / Model No. M11 Pro
User interface Android Mode/Pure Mode
CPU model Exynos 7872 14nm
No. of cores 6
CPU operating frequency 2GHz(A73×2), 1.6GHz(A53×4)
DAC AK4497EQ×2
Special features THX technology, MQA,Android 7.0, No SRC restriction, All to DSD, 2.5+3.5+4.4 output, Gesture control
Chips used SoC : Samsung Exynos 7872
DAC : AK4497EQ×2
Bluetooth chip:SAMSUNG S5N5C10B01-6330
FPGA:A3P030
LPF : OPA1642×3
AMP : LMH6644*2
Volume IC : NJW1195
Connectivity
WiFi 2.4GHz/5GHz
USB TYPE C Two-way USB2.0
Bluetooth transmit HWA/LDAC/aptX HD/aptX/SBC
Bluetooth receive SBC/LDAC
AirPlay Supported
DLNA/NAS UPNP protocol supported
AirPlay Supported
FiiO Link Supported
WiFi music transfer 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 64GB
Storage expansion type Micro SD crad
ROM available to user About 52GB
Maximum storage expansion Theoretically 2TB
Buttons and ports
Buttons Physical button+Side volume scroll+Touch screen
USB Two-way TYPE C USB2.0(Charging/Data transmisson/USB DAC/USB Audio)
Headphone out (PO)  3.5 mm headphone jack+2.5mm balanced headphone jack+4.4mm balanced headphone jack, 384kHz-32bit/DSD256
SPDIF output 3.5mm port(shared PO), 384kHz-32bit/DSD128
Line out (LO) 3.5 mm port(shared PO)
General
Color Black
Dimensions 70.5mm*130mm*16.5mm
Weight About 232g
Volume control 120 steps 
Recommended headphone impedance 16~150Ω (3.5mm headphone output)
16~300Ω (2.5mm+4.4mm balanced output)
Equalizer 10-band EQ (±6dB), 8 presets+custom preset, custom EQ supported
Balance control L10~R10(0.5dB/step)
Gain control L/H
USB Audio 384kHz-32bit/DSD128(DoP/D2P/Native)
USB DAC 384kHz-32bit/DSD128
Power specifications
USB power adapter QC2.0/MTK PE quick charger,PD2.0 charger,DC 12V/1.5A recommended
Battery capacity 4370mAh 3.8V Li-polymer battery supporting quick charge
Charging time About 2h(DC 12V/1.5A)
Deep sleep time 55 days
Battery Life & Test Conditions
3.5mm headphone output:>9.5h
Volume 63
Load M3 open earbuds (27 Ω)
Screen OFF
Test File MP3 44.1kHz/16bit
EQ OFF
Gain L
2.5mm+4.4mm balanced output:>8.5h
Volume 52
Load 32 Ω
Screen OFF
Test File MP3 44.1kHz/16bit
EQ OFF
Gain L
Others
Firmware Upgrade Supports both via zip file and OTA
MQA Supports 8x
All to DSD Supported
Double click to wakeup Supported
Navigation control Gesture control/Bottom navigation bar
Power-off timers Sleep/Idle poweroff
Maximun volume setting Supported
Third-party apps support Supports any app
Line output specifications(A-wt.)
THD+N <0.0006%(1kHz/10kΩ)
SNR >119dB
Frequency response 5Hz~86kHz(-3dB)
Noise floor  <2μV
Line level 1.95V
Channel separation >108dB
Headphone out specifications 1(3.5mm port, A-wt.)
Output power 1 ≥294mW(16Ω / THD+N<1%)
Output power 2 ≥200mW(32Ω /THD+N<1%)
Output power 3 ≥22mW(300Ω / THD+N<1%)
Output level 2.5V(32Ω /THD+N<1%)
2.62V(No load)
Output impedance ≤1.1Ω
THD+N <0.00084%(1kHz/32Ω)
Separation >72dB(1kHz/32Ω)
>113dB(No load)
Frequency response 5Hz~86kHz(-3dB)
Noise floor <3μV
SNR ≥118dB
Headphone out specifications 2(2.5mm+4.4mm balanced output, A-wt.)
Output power 1 ≥460mW(16Ω / THD+N<1%)
Output power 2 ≥550mW(4.2V)(32Ω /THD+N<1%)
Output power 3 ≥88.5mW(300Ω /THD+N<1%)
Output level 4.2V(32Ω /THD+N<1%)
5.15V(No load)
Output impedance ≤2.4Ω
THD+N <0.00108%(1kHz/32Ω)
Separation >108dB(1kHz/32Ω)
>115dB(No load)
Frequency response 5Hz~86kHz(-3dB)
Noise floor <4μV
SNR ≥119dB
File format support
Lossless: DSD:DSD64/128/256(".iso", ".dsf", ".dff"), DST iSO
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…