| Name / Model No. |
M15 |
User Interface |
Android/Pure Music/SB DAC/Bluetooth Receiver |
| CPU Model |
Exynos 7872 14nm |
No. of cores |
6 |
| CPU operating frequency |
2GHz (A73×2), 1.6GHz (A53×4） |
DAC |
AK4499EQ×2 |
| Chips used |
SoC：Exynos 7872, DAC: AK4499EQ*2，Control Chip: XMOS XUF208,
Bluetooth chip：CSR8675,
FPGA: NDK Femtosecond crystal oscillator*2, AMP：PA2211*2+OPA1622*4+OPA1612*4，FPGA: A3P030 |
Special Features |
Four independent system mode，Professional ADC Volume Adjustment Mode, Fully Decode (8x) the Original MQA Files, Innovative multifunctional button |
| Connectivity |
| USB |
TYPE C Two-way USB2.0 |
WiFi |
2.4GHz/5GHz |
| Bluetooth Transmit |
HWA/LDAC/aptX HD/aptX/SBC |
Bluetooth Receive（5.0） |
SBC/AAC/aptX LL/aptX HD/LDAC |
| AirPlay |
Supported |
DLNA/NAS |
UPNP protocol supported |
| FiiO Link |
Supported |
WiFi music transfer |
Supported |
| Display screen |
| Display size |
5.15 inches |
Sreen material |
Corning Gorilla Glass |
| Display type |
IPS Hi-Res incell screen |
Number of colours |
16.7M |
| Resolution |
1440×720 |
Viewing angle |
Full view |
| Touchscreen |
10-finger multi-touch |
PPI |
312 |
| Storage |
| RAM |
3GB |
ROM |
64GB |
| Storage expansion type |
Micro SD（TF card)，Hidden TF slot |
ROM available to user |
About 52G |
| Maximum storage expansion |
2TB (theoretically) |
|
|
| Buttons and ports |
| Buttons |
Physical button + analog potentiometer volume knob + HOLD lock switch + touch screen |
USB |
Two-way TYPE C USB2.0（Charging/Data transmisson/USB DAC/Digital audio out (Usb Type C)) |
| USB DAC |
768kHz-32bit/DSD512 |
Digital audio out (Usb Type C) |
DSD64/128/256，768kHz-32bit |
| Headphone Out (PO) |
3.5 mm headphone jack+2.5mm balanced headphone jack+4.4mm balanced headphone jack, 384kHz-32bit/DSD256 |
Line out（LO) |
3.5 mm port（shared PO） |
| SPDIF Output |
3.5mm port（shared PO), 384kHz-32bit/DSD128 |
|
|
| General |
| Color |
Black |
Dimensions |
134*75*18mm |
| Weight |
About 307g |
Volume control type |
Analog volume |
| Recommended headphone impedance |
16~150Ω (3.5mm headphone output) |
Equalizer |
10-band EQ (±12dB), 8 presets+custom preset, custom EQ supported |
| 16~600Ω (2.5mm+4.4mm balanced output) |
| Over-ear Headphone mode |
ON/OFF |
Gain control |
L/H |
| L/R channel balance adjustment |
L10~R10 (0.5dB every level） |
|
|
| Power specifications |
| USB power adapter |
QC2.0/MTK PE quick charger, PD2.0 charger, DC 12V/1.5A recommended |
Battery capacity |
7490mAh 3.8V Li-polymer battery supporting quick charge |
| Charging time |
About 3.5h (DC 12V/1.5A) |
Deep sleep time |
＞1800h |
| Battery Life & Test Conditions |
| 3.5mm headphone output：＞15h |
| Over-ear Headphone mode |
OFF |
Gain |
L |
| Screen |
OFF |
Test File |
MP3 44.1kHz/16bit |
| EQ |
OFF |
Load |
32Ω |
| 2.5mm+4.4mm balanced output：＞9h |
| Over-ear Headphone mode |
OFF |
Gain |
L |
| Screen |
OFF |
Test File |
MP3 44.1kHz/16bit |
| EQ |
OFF |
Load |
32Ω |
| Others |
| Firmware Upgrade |
Supports via zip file + TF card + OTA |
All to DSD |
Supported |
| MQA |
Supports 8x MQA |
Navigation control |
Gesture control/Bottom navigation bar |
| Double click to wakeup |
Supported |
Power-off timers |
Supports sleep/Idle poweroff |
| In-vehicle mode |
M15 will power on/off automatically when vehicle engine starts/stops |
Pulsing Indicator |
Can be set to always on/breath/off, the brightness can be customized or follow the volume |
| Screenshot |
Screenshot by three-fingers swiping down and pressing both the power and the last song button |
Locate Currently Playing Track with One-click |
Supported |
| Custom playlist sorting |
Supported |
Third-party apps support |
Supports any app |
| Line output specifications(A-wt.) |
| THD+N |
＜0.0004% (1kHz/10kΩ） |
SNR |
＞121dB |
| Frequency Response |
5Hz~90kHz (-3dB） |
Noise floor |
＜1.9μV |
| Channel Separation |
＞107dB |
Line level |
2.1V |
| Headphone out specifications 1（3.5mm port, A-wt.） |
| Output power 1 |
≥285mW (16Ω/THD+N＜1%)
≥405mW (Over-ear Headphone mode/16Ω/THD+N＜1%) |
Output impedance |
≤1.4Ω |
| Output power 2 |
≥215mW (32Ω/THD+N＜1%)
≥490mW (Over-ear Headphone mode/32Ω /THD+N＜1%) |
THD+N |
＜0.0005% (1kHz/32Ω） |
| Output power 3 |
≥31mW (300Ω/THD+N＜1%)
≥70mW (Over-ear Headphone mode/300Ω/ THD+N＜1%) |
Separation |
≥77dB
≥115dB (No load） |
| Frequency response |
20Hz~90kHz (-3dB） |
Noise floor |
＜2.1μV
＜3μV (Over-ear Headphone mode） |
| SNR |
≥121dB
≥119dB (Over-ear Headphone mode） |
|
|
| Balanced out specifications 2（2.5mm+4.4mm balanced output, A-wt.） |
| Output power 1 |
≥420mW (16Ω/THD+N＜1%)
≥370mW (Over-ear Headphone mode/16Ω/ THD+N＜1%) |
Output impedance |
≤3Ω |
| Output power 2 |
≥635mW (4.2V）(32Ω/THD+N＜1%）
≥800mW (Over-ear Headphone mode/32Ω/ THD+N＜1%) |
THD+N |
＜0.0006% (Over-ear Headphone mode/1kHz/300Ω） |
| Output power 3 |
≥120mW (300Ω /THD+N＜1%)
≥280mW (Over-ear Headphone mode/300Ω/ THD+N＜1%) |
Separation |
≥103dB
≥118dB (No load） |
| Frequency response |
20Hz~90kHz (-3dB） |
Noise floor |
＜3.8μV
＜5.2μV (Over-ear Headphone mode） |
| SNR |
≥122dB
≥118dB (Over-ear Headphone mode） |
|
|
| File format support |
| Lossless: |
DSD: DSD64/128/256 (“.iso”,“.dsf”,“.dff”), DST iSO
DXD: 352.8K/24bit
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, etc |
