General Specifications
Name/Model M15S

Hardware

Soc: Snapdragon 660, DAC: ES9038PRO, Amplifier: OPA926 * 2, Crystal Oscillator: NDK Femtosecond Crystal Oscillator * 2

working mode

Android mode/Pure music mode/USB DAC mode/Bluetooth receiving mode/AirPlay mode

/Roon Ready
Weight about 345g
color Black Volume Control Type button control or knob control
Size about 140x80x18.9mm Body Memory/User Free Space (ROM) 64GB/About 46GB
screen

5.5-Inch full-fit screen (resolution 1440 * 720)

Gain

Ultra high (Quick charge)/Super high/high/medium/low

RAM

4GB

Recommended headphone impedance

8 ~ 150Ω (single-ended output)/8 ~ 350Ω (balanced output)

Storage expansion

Single TF card slot, up to 2TB (theoretically)

Channel balance

L20~ R20 (0.5dB per level)

Buttons and interfaces

Button

Physical key

USB

TYPE C USB3.0 (charging/data transmission)

Headphone output

3.5mm single-ended 

Line output port

3.5 mm (shared with PO port)

Balanced output

2.5mm + 4.4mm balanced

Balanced line output interface

2.5mm balance + 4.4mm balance (shared with PO ports)

coaxial interface

3.5 mm (shared with PO port, up to 384kHz-32bit/DSD128)

   
Features
WiFi 2.4GHz/5GHz, supports DLNA transmission and reception, AirPlay, WiFi transmission, Roon Ready, etc. Bluetooth Transmitter (5.0) SBC, AAC, aptX, aptX HD, LDAC, LHDC
Bluetooth reception (5.0) SBC, AAC, aptX, aptX HD, aptX LL, LDAC, aptX Adaptive FiiO Link Android support WiFi and Bluetooth control, iOS support WIFI control
MQA

Global 8x decoding

All to DSD support

Double click to wakeup

support USB Audio 768kHz-32bit/DSD512 (DoP/D2P/Native)
Maximum supported sampling rate

Native: Up to 384kHz-32bit/DSD256

Car mode can follow the car USB automatic switch machine

USB DAC up to 384kHz-32bit/DSD256

EQ 

10-band dynamic EQ adjustment (± 12dB), built-in 8 preset EQ, support custom EQ

Power-off timer

Support power saving shutdown/sleep shutdown

Navigation control

Gesture control/2-Bottom navigation/3-Bottom navigation

Firmware Upgrade

Support local storage upgrade + TF card local upgrade + OTA push upgrade

   
Power Parameters
power supply

Support QC3.0, QC4.0 and PD2.0 and PD3.0 quick charge

Standby Time >1000h
charging time

About 3.5 hours (QC3.0 quick charge mode)

   

Battery life and test conditions

3.5mm headphone output: 10.5 hours
Volume 40 Gain

super high

Screen status

Off

Tracks formats

MP3 44.1kHz/16bit
EQ

Off

Load 32 Ω
2.5mm +4.4mm balanced output: 9 hours
Volume 29 Gain

super high

Screen status

Off

Play tracks and formats MP3 44.1kHz/16bit
EQ

Off

Load 32 Ω
Audio Parameters

PO output performance parameters (Ultra high)

Output power 1 L+R≥535mW+535mW(16Ω / THD+N<1%) Output impedance ≤ 1.4 Ω(32 Ω)
Output power 2 L+R≥580mW+580mW(32Ω /THD+N<1%)

THD+N

≤ 0.0005%(1kHz/32Ω)
Output power 3 L+R≥93mW+93mW(300Ω / THD+N<1%)

SNR

≥ 122.5dB(A weighted)

Crosstalk

≥ 80dB(1kHz/32Ω)

Noise floor

≤ 3.2 μV(A weighted)
Frequency response 20Hz~20kHz(-0.15dB) Peak output voltage 15.0 Vpp
20Hz~50kHz(-1.0dB)

PO output performance parameters (Super high)

Output power 1 L+R≥475mW+475mW(16Ω / THD+N<1%)

Output impedance

≤ 1.4 Ω(32 Ω)
Output power 2 L+R≥395mW+395mW(32Ω /THD+N<1%)

THD+N

≤ 0.0005%(1kHz/32Ω)
Output power 3 L+R≥57mW+57mW(300Ω / THD+N<1%)

SNR

≥ 121.0dB(A weighted)

Crosstalk

≥ 80dB(1kHz/32Ω)

Noise floor

≤ 3.2 μV(A weighted)
Frequency response 20Hz~20kHz(-0.15dB) Peak output voltage 11.7 Vpp
20Hz~50kHz(-1.0dB)    

Line output performance parameters

THD+N

≤ 0.00034%(1kHz/10kΩ)

SNR

≥ 124.0dB(A-weighted)

Crosstalk

≥ 106dB(1kHz/10kΩ)

Noise floor

≤ 1.2 μV(A weighted)
Frequency response 20Hz~20kHz(-0.1dB) Line Output Level 2.0Vrms(1kHz/10kΩ)
20Hz~50kHz(-0.7dB)    

Balanced headphone output performance parameters (Ultra high)

Output Power 1 L+R≥531mW+531mW(16Ω / THD+N<1%)

Output impedance

≤ 2.3 Ω(32 Ω)
Output Power 2 L+R≥1200mW+1200mW(32Ω /THD+N<1%)

THD+N

≤ 0.00075%(1kHz/32 Ω)
Output Power 3 L+R≥368mW+368mW(300Ω /THD+N<1%)

SNR

≥ 121.5dB(A weight)

Degree of separation

≥105.0dB(1kHz/32Ω)

Noise floor

≤ 5.2 μV(A weighting)
Frequency response 20Hz~20kHz(-0.15dB) Peak output voltage 30.0Vpp
20Hz~50kHz(-1.0dB)    

Balanced headphone output performance parameters (Super high)

Output Power 1 L+R≥531mW+531mW(16Ω / THD+N<1%) Output impedance ≤ 2.3 Ω(32 Ω)
Output Power 2 L+R≥990mW+990mW(32Ω /THD+N<1%)

THD+N

≤ 0.00075%(1kHz/32 Ω)
Output Power 3 L+R≥226mW+226mW(300Ω /THD+N<1%)

SNR

≥ 120.5dB(A weight)

Degree of separation

≥105.6dB(1kHz/32Ω)

Noise floor

≤ 5.2 μV(A weighting)

Frequency response

20Hz~20kHz(-0.15dB) Peak output voltage 23.7 Vpp
20Hz~50kHz(-1.0dB)    

Balanced line output performance parameters

THD+N

≤ 0.00031%(1kHz/10 kΩ)

SNR

≥ 127.7dB(A weight)

Crosstalk

≥ 106dB(1kHz/10 kΩ)

Noise floor

≤ 1.7 μV(A weighting)

Frequency response

20Hz~20kHz(-0.1dB)

Line output level

4.0Vrms(1kHz/10kΩ)
20Hz~50kHz(-0.7dB)    
Audio 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)

DTS: 192kHz/24bit(MAX)

MQA:Full Decoderer

   
Lossy compression: MP3,OGG,WMA,AAC and other formats    

失真曲线4

 

Test conditions: -4dB sinusoidal signal, 20Hz-20kHz, balanced line output (10KΩ load)

频响曲线 4

 

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, balanced line output (10KΩ load)

频响曲线7

 

Test conditions: -5dB sinusoidal signal, 20Hz-50kHz, line output (10KΩ load)

频响曲线8

 

Test conditions: -5dB sinusoidal signal, 20Hz-50kHz, balanced line output (10KΩ load)

失真曲线1

 

Test conditions: -6dB sinusoidal signal, 20Hz-20kHz, headphone output (32Ω load)

失真曲线3

 

Test conditions: -8dB sinusoidal signal, 20Hz-20kHz, balanced output (32Ω load)

频响曲线2

 

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, balanced output (32Ω load)

失真曲线2

 

Test conditions: 0dB sinusoidal signal, 20Hz-20kHz, single-ended line output (10KΩ load)

频响曲线 5

 

Test conditions: -5dB sinusoidal signal, 20Hz-50kHz, headphone output (32Ω load)

频响曲线 3

 

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, line output (10KΩ load)

频响曲线6

 

Test conditions: -5dB sinusoidal signal, 20Hz-50kHz, balanced output (32Ω load)

频响曲线 1

Test conditions: -5dB sinusoidal signal, 20Hz-20kHz, headphone output (32Ω load)