FiiO M21

Product information "FiiO M21"
High-Res lossless music player 

  • New octa-core Snapdragon 680 processor with 6nm structure width 
  • Android 13 
  • 4x CS43198 DACs 
  • Fully balanced 2-stage amplification 
  • Dual Type-C ports 950mW high output power 
  • 4.7-inch HD screen 
  • 3.5mm + 4.4mm headphone/LO dual output 

A new benchmark, a new paradigm 
The M21 redefines the entry-level class with its flagship pedigree, its inner and outer values will bring you much joy. Its compact display and class-leading performance are a big step forward and it will be a benchmark for a whole new generation. 

Patented desktop mode 
Expert in battery protection Desktop mode is available for the first time on an entry-level FiiO player. When desktop mode is activated, the M21 is fully powered by an external power supply. The built-in battery is neither charged nor discharged, so you can safely use the player on your desk without draining the battery. Patent number: ZL202321946664.8 

Portable/desktop dual power supply mode 
A leap in performance In portable mode, the player is powered by a standard power supply. When using the external power supply in “Super High Gain” mode, the player automatically switches to a high voltage supply with a peak output voltage of 21 Vpp (300 ohms) and a massive output power of 950 mW (32 ohms). This delivers desktop-level performance, making the player more compatible with a wider range of earphones or headphones and providing a truly exceptional listening experience. 

Real quality inside and out 
The all-aluminum alloy body with a frosted AG glass back offers a fine texture and is comfortable to hold. The screen has an oleophobic coating that significantly reduces fingerprints and smudges and enables smoother touch operation. 

Digital and analog shielding 
A heavenly sound The digital and headphone amplifier sections are housed in separate partitions, each with independent shielding covers for isolation. This not only reduces signal crosstalk, but also enables efficient heat dissipation and delivers a purer sound. 

Flagship-level performance 
There are separate power supply paths for the digital and analog circuits, effectively reducing crosstalk between the two. The result is more precise digital processing, a purer analog output and improved drive performance. The analog circuit is further divided into multiple independent power supplies for components such as the DAC and headphone amplifier. This clean and robust power supply improves the dynamic range and results in a better reproduction of details in the audio range - for a more refined and natural sound. 

High-end hi-fi components for better sound 
The M21's audio circuitry uses high-precision thin-film resistors and temperature-stable capacitors for refined and stable sound - especially for greater consistency between the left and right channels and across all frequency ranges. In addition, fine circuits such as the DAC and headphone amplifier are equipped with over 10 low-impedance, high-capacitance tantalum capacitors. These provide ample power reserves and a robust power supply for a more powerful, dynamic sound. 

Global audio optimization 
5th generation FPGA + two custom femtosecond crystal oscillators 
FIIO has developed a crystal oscillator specifically for the M21, carefully selected to meet femtosecond standards to ensure consistency and stability in output. With a high-precision, low-jitter unified clock source, it accurately matches PCM and DSD audio at different sampling rates, ensuring precise reproduction of digital audio signals. 

Versatile connectivity 
3.5mm and 4.4mm line outputs The independent line amplifier circuits allow connection to powered speakers or external amplifiers. 
Digital output SPDIF output: The low-jitter coaxial output is comparable to that of Pro Equipment, with jitter reduced by 70% and high performance when connected to a high-end external audio DAC. 
Coaxial output circuit architecture USB audio output: Connect an external audio DAC and instantly turn it into a streaming jukebox. 

15 hours of battery life 
Explore the world of music 
The M21's 4000 mAh high-voltage battery offers an extremely long battery life of up to 15 hours, effortlessly providing the power for extended listening sessions on the way to work or while traveling, so you can fully immerse yourself in the world of music. It also supports 20W PD fast charging, so you can charge quickly even during short breaks. 
Only the POWER IN interface supports PD fast charging. 

Back to the Walkman era at the touch of a button 
The customized cassette-style protective case* combined with an exclusive retro user interface and customized vintage sound effects takes you on a nostalgic journey back to the Walkman era... 
Remove the protective cover to seamlessly return to the original system so you can use the device as you wish. 
*The cassette-style protective cover must be purchased separately. 
**When using the cassette-style protective case, touchscreen operation is disabled; only the buttons are supported. 

What`s in the box: 
M21*1 
Hardened screen protector (factory pre-installed*1) 
Silicone protective cover*1 
Warranty card *1 
Quick start guide *1 
USB data cable * 1 
User manual *1
Specifications
  • Color: Titanium Gold, Dark Blue 
  • Dimensions: approx. 68 mm x 121 mm x 17 mm 
  • Weight: approx. 193 g 
  • Hardware configuration SoC: Snapdragon 680 
  • Operating system: Android 13 
  • DAC: 0843198*4 
  • Display: 4.7 inch (750 x 1334) fully laminated screen 
  • Battery capacity: 4000 mAh 
  • Charging: Supports PD2.0 and PD3.0 PPS fast charging 
  • Battery life: 15 hours single-ended, 12.5 hours balanced 
  • RAM: 4 GB Internal memory/available capacity: 64 GB/approx. 52 GB 
  • Memory expansion: microSD card, supports 2 TB 
  • Headphone outputs: single-ended 3.5 mm PO/LO/SPDIF + balanced 4.4 mm PO/LO 
  • USB interfaces: Type-C USB3.0*1 (charging/data transfer) + Type-C POWER IN*1 (charging/independent power supply) 

Bluetooth specifications 
  • Bluetooth version: 5.0 
  • Bluetooth transmitter: AAC/SBC/aptX/aptX HD/LDAC/LHDC 
  • Bluetooth receiver: SBC/AAC/LDAC 
  • Headphone outputs Output power 1: L+R > 950 mW+950 mW (32 Ohm/THD + N<1 % balanced/super high gain mode) 
  • Output power 2: L+R > 185 mW+185 mW (300 Ohm/THD + N<1 % balanced/super-high-gain mode) 
  • Output power 3: L+R > 405 mW+405 mW (32 Ohm/THD + N<1 % single-ended/super-high-gain mode) 
  • Output power 4: L+R2 > 45 mW+45 mW (300 Ohm/THD + N<1 % single-ended/super-high-gain mode) 
  • Output power 5: L+R > 720 mW+720 mW (32 Ohm/THD + N<1 % balanced/high gain mode) 
  • Output power 6: L+R > 290 mW+290 mW (32 Ohm/THD + N<1 % single-ended/high gain) 
  • SNR: > 126 dB (A-weighted) 
  • Noise floor: <1.6 µV (A-weighted) 
  • Output impedance: <102 
  • THD+N: <0.0003 % (1 kHz/-4 d8@320)
User Manual
Informationen zum Hersteller
High-Res lossless music player 

  • New octa-core Snapdragon 680 processor with 6nm structure width 
  • Android 13 
  • 4x CS43198 DACs 
  • Fully balanced 2-stage amplification 
  • Dual Type-C ports 950mW high output power 
  • 4.7-inch HD screen 
  • 3.5mm + 4.4mm headphone/LO dual output 

A new benchmark, a new paradigm 
The M21 redefines the entry-level class with its flagship pedigree, its inner and outer values will bring you much joy. Its compact display and class-leading performance are a big step forward and it will be a benchmark for a whole new generation. 

Patented desktop mode 
Expert in battery protection Desktop mode is available for the first time on an entry-level FiiO player. When desktop mode is activated, the M21 is fully powered by an external power supply. The built-in battery is neither charged nor discharged, so you can safely use the player on your desk without draining the battery. Patent number: ZL202321946664.8 

Portable/desktop dual power supply mode 
A leap in performance In portable mode, the player is powered by a standard power supply. When using the external power supply in “Super High Gain” mode, the player automatically switches to a high voltage supply with a peak output voltage of 21 Vpp (300 ohms) and a massive output power of 950 mW (32 ohms). This delivers desktop-level performance, making the player more compatible with a wider range of earphones or headphones and providing a truly exceptional listening experience. 

Real quality inside and out 
The all-aluminum alloy body with a frosted AG glass back offers a fine texture and is comfortable to hold. The screen has an oleophobic coating that significantly reduces fingerprints and smudges and enables smoother touch operation. 

Digital and analog shielding 
A heavenly sound The digital and headphone amplifier sections are housed in separate partitions, each with independent shielding covers for isolation. This not only reduces signal crosstalk, but also enables efficient heat dissipation and delivers a purer sound. 

Flagship-level performance 
There are separate power supply paths for the digital and analog circuits, effectively reducing crosstalk between the two. The result is more precise digital processing, a purer analog output and improved drive performance. The analog circuit is further divided into multiple independent power supplies for components such as the DAC and headphone amplifier. This clean and robust power supply improves the dynamic range and results in a better reproduction of details in the audio range - for a more refined and natural sound. 

High-end hi-fi components for better sound 
The M21's audio circuitry uses high-precision thin-film resistors and temperature-stable capacitors for refined and stable sound - especially for greater consistency between the left and right channels and across all frequency ranges. In addition, fine circuits such as the DAC and headphone amplifier are equipped with over 10 low-impedance, high-capacitance tantalum capacitors. These provide ample power reserves and a robust power supply for a more powerful, dynamic sound. 

Global audio optimization 
5th generation FPGA + two custom femtosecond crystal oscillators 
FIIO has developed a crystal oscillator specifically for the M21, carefully selected to meet femtosecond standards to ensure consistency and stability in output. With a high-precision, low-jitter unified clock source, it accurately matches PCM and DSD audio at different sampling rates, ensuring precise reproduction of digital audio signals. 

Versatile connectivity 
3.5mm and 4.4mm line outputs The independent line amplifier circuits allow connection to powered speakers or external amplifiers. 
Digital output SPDIF output: The low-jitter coaxial output is comparable to that of Pro Equipment, with jitter reduced by 70% and high performance when connected to a high-end external audio DAC. 
Coaxial output circuit architecture USB audio output: Connect an external audio DAC and instantly turn it into a streaming jukebox. 

15 hours of battery life 
Explore the world of music 
The M21's 4000 mAh high-voltage battery offers an extremely long battery life of up to 15 hours, effortlessly providing the power for extended listening sessions on the way to work or while traveling, so you can fully immerse yourself in the world of music. It also supports 20W PD fast charging, so you can charge quickly even during short breaks. 
Only the POWER IN interface supports PD fast charging. 

Back to the Walkman era at the touch of a button 
The customized cassette-style protective case* combined with an exclusive retro user interface and customized vintage sound effects takes you on a nostalgic journey back to the Walkman era... 
Remove the protective cover to seamlessly return to the original system so you can use the device as you wish. 
*The cassette-style protective cover must be purchased separately. 
**When using the cassette-style protective case, touchscreen operation is disabled; only the buttons are supported. 

What`s in the box: 
M21*1 
Hardened screen protector (factory pre-installed*1) 
Silicone protective cover*1 
Warranty card *1 
Quick start guide *1 
USB data cable * 1 
User manual *1
EU-Verantwortlicher
NT Global Distribution GmbH
Waller Heerstr. 104
28219 Bremen
Deutschland
www.nt-global.de
info@nt-global.com