General Specifications

 

Name/Model M23 Hardware solution SoC: Snapdragon 660, DAC: AK4191EQ+AK4499EX, Amp: 4-way THX AAA-78+, charging: AW32271
Working mode Android/Pure music/USB DAC/Bluetooth Receiving/AirPlay/Roon Ready Color Deep blue/Stainless steel
Dimensions About 75.7x136.5x18.1mm Dimensions About 299g (Deep blue)/About 392.3g (Stainless steel)
Display 5.5-inch bezel-less screen (1440*720 resolution ratio) Volume control way Slide or button control
RAM 4GB Internal storage/available space (ROM) 64GB/about 46GB
Memory card Single microSD card expansion, up to 2TB in theory)  Gain mode Super High (for fast charge)/High/Medium/Low Gain modes
Channel balance L20~R20  (0.5dB per level) Adaptive impedance PO: 8~150Ω  BAL: 8~350Ω 
Buttons and Ports
Buttons Power button*1; Multifunction button*1;volume touch panel*1; Play/Pause*1; Previous track*1; Next track*1 Toggle switch HOLD*1; D.MODE*1
Headphone out 3.5 mm Line output 3.5 mm (shared PO)
BAL headphone out 4.4 mm BAL line output 4.4 mm (shared BAL)
COAX headphone out 3.5 mm  (shared PO,  supports up to 384kHz-24bit/DSD128) USB Type-C USB3.0*1 (charging/data transmission)+Type-C POWER IN*1 (Charging/Independent power supply)
Characteristics
WiFi 2.4GHz/5GHz, supports multimedia service (DLNA), AirPlay, WiFi song transfer, Roon Ready, etc. Bluetooth transmission (5.0) SBC/AAC/aptX/aptX HD/LDAC/LHDC
Bluetooth reception (5.0) SBC/AAC/LDAC FIIO Link Android supports WiFi and Bluetooth control, iOS supports WiFi control
MQA Supports MQA full decoding All to DSD Supported
Double tap to wake up Supported In-vehicle mode Auto on/off following the USB of the vehicle
Max supported sampling rate Local decoding: up to 384kHz-32bit/DSD256 Power off timers Supports Sleep/Idle power off
USB DAC: up to 384kHz-32bit/DSD256 EQ adjustment 10-band dynamic EQ adjustment (±12dB), built in 8 types of preset EQ, self-define EQ, supports PEQ
USB Audio: 768kHz-32bit/DSD512 (supports DoP/D2P/Native) System navigation mode Supports gesture navigation, 2-button navigation and 3-button navigation
Firmware upgrade Supports upgrade from local storage/memory card/OTA    
Power Supply Parameters
Power Supply Supports QC3.0, QC4.0, PD2.0, PD3.0 PPS fast charge Battery capacity 5500mAh
Charging time About 2.5 hours (PD3.0 fast charge mode) Standby time >1000h
Battery life and test conditions    
3.5mm headphone out: 10.5 hours
Volume level 52 Gain level High gain
Display status OFF Playing track and format MP3 44.1kHz/16bit
EQ OFF Load 32Ω
4.4mm BAL headphone out: 9 hours
Volume level 41 Gain level High gain
Display status OFF Playing track and format MP3 44.1kHz/16bit
EQ OFF Load 32Ω
Audio Parameters
Parts of performance and parameters of PO (Super High Gain mode)
Output power L+R≥480mW+480mW (16Ω ,  THD+N<1%) Output impedance <1Ω
L+R≥440mW+440mW (32Ω, THD+N<1%) THD+N & Noise ≤0.00038% (1kHz/-6dB@32Ω)
L+R≥60mW+60mW (300Ω, THD+N<1%) SNR ≥125dB (A-weighted)
Crosstalk ≥72dB (1kHz@32Ω) Noise floor ≤1.9μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Peak output voltage 12 Vp-p
20Hz~80kHz: damping<1.1dB    
Parts of performance and parameters of PO (High gain)
Output power L+R≥235mW+235mW (16Ω ,  THD+N<1%) Output impedance <1Ω
L+R≥125mW+125mW (32Ω, THD+N<1%) THD+N & Noise ≤0.00046% (1kHz/-4.1dB@32Ω)
L+R≥15mW+15mW (300Ω, THD+N<1%) SNR ≥120dB (A-weighted)
Crosstalk ≥71dB (1kHz@32Ω) Noise floor ≤1.9μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Peak output voltage 6 Vp-p
20Hz~80kHz: damping<1.1dB    
Parts of performance and parameters of line-out
THD+N & Noise ≤0.00043% (1kHz/0dB@10kΩ) SNR ≥126dB (A-weighted)
Crosstalk ≥110dB (1kHz@10kΩ) Noise floor ≤1.1μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Line output level 2.0Vrms
20Hz~80kHz: damping<1.1dB    
Parts of performance and parameters of BAL headphone out (Super High Gain mode)
Output power L+R≥730mW+730mW (16Ω ,  THD+N<1%) Output impedance <2Ω
L+R≥1000mW+1000mW (32Ω, THD+N<1%) THD+N & Noise ≤0.00038% (1kHz/-12dB@32Ω)
L+R≥240mW+240mW (300Ω, THD+N<1%) SNR ≥125dB (A-weighted)
Crosstalk ≥117dB (1kHz@32Ω) Noise floor ≤3.1μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Peak output voltage 23.5 Vp-p
20Hz~80kHz: damping<1.1dB    
Parts of performance and parameters of BAL headphone out (High Gain mode)
Output power L+R≥630mW+630mW (16Ω ,  THD+N<1%) Output impedance <2Ω
L+R≥475mW+475mW (32Ω, THD+N<1%) THD+N & Noise ≤0.00039% (1kHz/-5.7dB@32Ω)
L+R≥55mW+55mW (300Ω, THD+N<1%) SNR ≥122dB (A-weighted)
Crosstalk ≥115dB (1kHz@32Ω) Noise floor ≤3.1μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Peak output voltage 11 Vp-p
20Hz~80kHz: damping<1.1dB    
Parts of performance and parameters of BAL line-out
THD+N & Noise ≤0.00033% (1kHz/-10.3dB@10kΩ) SNR ≥129dB (A-weighted)
Crosstalk ≥106dB (1kHz@10kΩ) Noise floor ≤1.4μV (A-weighted)
Frequency response 20Hz~20kHz: damping<0.1dB Line output level 4.0Vrms
20Hz~80kHz: damping<1.1dB    

Frequency response curve 1

 

Test conditions: Super high gain mode, full volume playback -6dB sinusoidalsignal,

20Hz-20kHz, headphone out (32Ω load)

Frequency response curve 3

 

Test conditions: Super high gain mode, full volume playback -8dB sinusoidal signal,

20Hz-20kHz, BAL headphone out (32Ω load)

THD+N curve 1

 

Test conditions: Super high gain mode, full volume playback -6dB sinusoidal signal,

20Hz-20kHz, headphone out (32Ω load)

Frequency response curve 2

 

Test conditions: Super high gain mode, full volume playback -6dB sinusoidal signal,

20Hz-80kHz, headphone out (32Ω load)

Frequency response curve 4

 

Test conditions: Super high gain mode, full volume playback -8dB sinusoidal signal,

20Hz-80kHz, headphone out (32Ω load)

THD+N curve 2

 

Test conditions: Super high gain mode, full volume playback -12dB sinusoidal signal,

20Hz-20kHz, BAL headphone out (32Ω load)

Frequency response curve 5

 

Test conditions: Super high gain mode,

full volume playback -5dB sinusoidal signal, 20Hz-20kHz, line-out (10KΩ load)

Frequency response curve 6

 

Test conditions: Super high gain mode, full volume playback -5dB sinusoidal signal,

20Hz-80kHz, line-out (10KΩ load)

Frequency response curve 7

 

Test conditions: Super high gain mode, full volume playback -5dB sinusoidal signal,

20Hz-20kHz, BAL line-out (10KΩ load)

Frequency response curve 8

 

Test conditions: Super high gain mode, full volume playback -5dB sinusoidal signal,

20Hz-80kHz, BAL line-out (10KΩ load)

THD+N curve 3

 

Test conditions: Super high gain mode, full volume playback -10.3dB sinusoidal signal,

20Hz-20kHz, BAL line-out (10KΩ load)

THD+N curve 4

 

Test conditions: Super high gain mode, full volume playback 0dB sinusoidal signal,

20Hz-20kHz, SE line-out (10KΩ load)

Amplitude distortion 1 

 

PO Super High Gain Mode 2V@32Ω

Amplitude distortion 2 

 

BAL PO Super High Gain Mode 4V@32Ω

Amplitude distortion 3

 

LO @10KΩ

Amplitude distortion 4

 

BAL LO @10KΩ