Trustscore 4.8

FiiO M21 Digital Audio Player, Blue

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Colour: Blue

Key Features

  • Four CS43198 Matrix DAC chips
  • Two-stage fully balanced headphone amp, with up to 950mW (32?) output
  • Powered by Android 13 and an 8-core Snapdragon 680 for fast, app-friendly operation
  • Run in desktop mode via external USB-C power for long-session performance
  • Dual USB-C ports (data + power), Wi-Fi, AirPlay, DLNA, and two-way LDAC Bluetooth 5.0

FiiO M21 Digital Audio Player, Blue Overview

View this description in German

The FiiO M21 Digital Audio Player sets a benchmark if you're just stepping into the world of serious portable hi-fi, striking a balance between performance, price, and practical features. It uses four CS43198 DAC chips and a fully balanced, two-stage amp to deliver clean, dynamic sound?with up to 950mW of output at 32Ω for harder-to-drive headphones. Wi-Fi, two-way LDAC Bluetooth, and DLNA for streaming over your home network also give you flexible connection options wherever you're listening.


Running Android 13 with an 8-core Qualcomm Snapdragon 680, the M21 offers a responsive and app-friendly experience similar to a modern smartphone, but lets you focus purely on your music. You can also use the M21 in desktop mode with the dedicated USB-C power input, preserving battery health and sound quality during long listening sessions. Altogether, this makes it a smart investment from starter players, with specs offering long-term potential.

Product Ref: 336188

Full Description

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What's in the Box?

  • FiiO M21 Digital Audio Player
  • Tempered film screen protector (pre-installed)
  • Protective case
  • Warranty card
  • Quick start guide
  • USB data cable
  • GPL V2 instruction manual

Specifications

General

Name/Model M21
Hardware solution SoC: Qualcomm Snapdragon 680

DAC: 4 x CS43198

Amp: 2 x OPA1692 + 2 x SGM8262-2
Working mode Android

Pure music

AirPlay

USB DAC

Bluetooth Receiving
RAM 4GB
Internal storage/Available capacity (ROM) 64GB/approx. 52GB
Memory card Single microSD card expansion, up to 2TB in theory
Adaptive impedance PO: 8 350Ω

BAL: 8 350Ω
Channel separation L20 R20 (0.5dB per level)
Volume control type Button control
Colour Titanium gold

Dark blue
Dimensions approx. 68 x 121 x 17 mm
Weight approx. 193g
Display 4.7-inch (750x1334) bezel-less screen

Buttons and ports

Controls Power button

Multifunction button

Volume buttons

Play/Pause button

Previous track

Next track
Toggle switch HOLD switch

D.MODE switch
Line output Standard 3.5mm (shared PO)
BAL line output Standard 4.4mm (shared BAL)
Headphone output Standard 3.5mm
BAL headphone output Standard 4.4mm
COAX headphone output Standard 3.5mm (shared PO)
Exposed contacts Connect to cassette-style protective case

Special functions

WiFi 2.4GHz/5GHz, supports DLNA, AirPlay, WiFi song transfer, Roon Ready, etc.
Bluetooth reception (5.0) SBC/AAC/LDAC
Bluetooth transmission (5.0) AAC/SBC/aptX/aptX HD/LDAC/LHDC
FiiO Link Android supports WiFi and Bluetooth control, iOS supports Bluetooth control
MQA Supports MQA full decoding
All to DSD Supported
EQ adjustment 10-band dynamic EQ adjustment (±12dB), built in 8 types of preset EQ, self-define EQ
System navigation mode Supports gesture navigation, 2-button navigation and 3-button navigation
Double tap to wake up Supported
Power off timers Supports Sleep/Idle power off
Max supported sampling rate USB DAC: Supports up to 384kHz/32bit; DSD256 (Native)

Local decoding: Supports up to 384kHz/32bit; DSD256 (Native)

USB Audio: 768kHz/32bit; DSD512 (supports DoP/D2P/Native)

Coaxial output: Supports up to 384kHz/24bit; DSD128 (DOP)
Firmware upgrade Supports upgrade from local storage/memory card/OTA

Power supply parameters

Power supply Supports D2.0 and PD3.0 fast charging
Charging time About 1.5h (PD3.0 fast charging mode)

Battery life test conditions (3.5mm headphone out)

3.5mm headphone out 15 hours
Volume level 44
Display status OFF
EQ OFF
Gain level High
Playing track and format MP3 44kHz/16bit
Load 32Ω

Battery life test conditions (4.4mm headphone out)

4.4mm headphone out 12.5 hours
Volume level 33
Display OFF
EQ OFF
Gain level High gain
Playing tack and format MP3 44kHz/16bit

Audio Parameters

Parts of performance and parameters of PO (3.5mm, USB DAC, Super High Gain mode)

Output power L+R≥480mW+480mW (16Ω, THD+N?1 )

L+R≥405mW+405mW (32Ω, THD+N?1 )

L+R≥45mW+45mW (300Ω, THD+N?1 )
SNR ≥124dB (A-weighted)
THD+N ?0.0003 (1kHz/-4dB@32Ω)
Frequency response 20Hz 85kHz: attenuation?2dB

20Hz 20KHz: attenuation?0.02dB
Output impedance ?1Ω
Crosstalk ≥74dB
Peak output voltage 10.6Vp-p
Noise floor ?2uV (A-weighted)
Dynamic range ≥124dB (A-weighted)

Parts of performance and parameters of PO (3.5mm, USB DAC, High Gain mode)

Output power L+R≥380mW+380mW (16Ω, THD+N?1 )

L+R≥290mW+290mW (32Ω, THD+N?1 )

L+R≥35mW+35mW (300Ω, THD+N?1 )
SNR ≥123dB (A-weighted)
THD+N ?0.0004 (1kHz/-4dB@32Ω)
Frequency response 20Hz 85kHz: attenuation?2dB

20Hz 20KHz: attenuation?0.02dB
Output impedance ?1Ω
Crosstalk ≥74dB
Peak output voltage 9.5Vp-p
Noise floor ?2.1uV (A-weighted)
Dynamic range ≥123dB (A-weighted)

Parts of performance and parameters of LO

THD+N ?0.0005 (1kHz/-5dB@10KΩ)
Crosstalk ≥111dB
Frequency response 20Hz 85kHz: attenuation?1.8dB

20Hz 20KHz: attenuation?0.02dB
SNR ≥122dB (A-weighted)
Noise floor ?1.6uV (A-weighted)
Line output level 1.9Vrms
Dynamic range ≥122dB (A-weighted)

Parts of performance and parameters of BAL headphone out (4.4mm, USB DAC, Super High Gain mode)

Output power L+R≥540mW+540mW (16Ω, THD+N?1 )

L+R≥950mW+950mW (32Ω, THD+N?1 )

L+R≥185mW+185mW (300Ω, THD+N?1 )
SNR ≥126dB (A-weighted)
Frequency response 20Hz 85kHz: attenuation?2dB

20Hz 20KHz: attenuation?0.03dB
Output impedance ?1.5Ω
Crosstalk ≥109dB
Peak output voltage 21.2Vp-p
THD+N ?0.0005 (1kHz/-12dB@32Ω)
Noise floor ?2.7uV (A-weighted)
Dynamic range ≥125dB (A-weighted)

Parts of performance and parameters of BAL headphone out (4.4mm, USB DAC, High Gain mode)

Output power L+R≥600mW+600mW (16Ω, THD+N?1 )

L+R≥720mW+720mW (32Ω, THD+N?1 )

L+R≥90mW+90mW (300Ω, THD+N?1 )
SNR ≥125dB (A-weighted)
Frequency response 20Hz 85kHz: attenuation?2dB

20Hz 20KHz: attenuation?0.03dB
Output impedance ?1.5Ω
Crosstalk ≥109dB
Peak output voltage 15Vp-p
THD+N ?0.0005 (1kHz/-8dB@32Ω)
Noise floor ?2.7uV (A-weighted)
Dynamic range ≥124dB (A-weighted)

Parts of performance and parameters of BAL LO

THD+N ?0.0003 (1kHz/-0dB@10KΩ)
SNR ≥126dB (A-weighted)
Crosstalk ≥103dB
Noise floor ?1.9uV (A-weighted)
Frequency response 20Hz 85kHz: attenuation?1.8dB

20Hz 20KHz: attenuation?0.02dB
Line output level 3.9Vrms
Dynamic range ≥125dB (A-weighted)

Product information

Product code FIIOM21-BLUE
EAN 6953175761143

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