FIIO M21

M21: The new standard for entry-level audio

The M21 redefines the entry-level segment with flagship-level performance and design. Compact yet powerful, it sets a new benchmark for a generation of portable players, featuring a premium finish and impressive sound quality.

Desktop mode with battery protection

For the first time on a FiiO entry-level model, desktop mode is available. In this mode, the player is fully powered by an external power source, without charging or discharging the internal battery—ideal for extended use on your desk.

Patent No. ZL202321946664.8

Dual power supply, desktop-level performance

Use standard power on the go or connect external power in “Super High Gain” mode for up to 21 Vpp (300Ω) and 950 mW (32Ω)—powerful enough for demanding headphones and an immersive listening experience.

Refined design & display

The M21 features an elegant aluminum chassis with a matte AG-glass back panel. The oleophobic display resists fingerprints and ensures smooth operation.

Pure sound through shielding

Separate and shielded digital and amplifier sections reduce crosstalk and improve heat dissipation, resulting in clearer and more natural sound.

Separate power supplies for digital and analog

Independent power paths for digital and analog circuits reduce interference, improve dynamics, and enhance detail reproduction. Key components such as the DAC and headphone amplifier receive separate power supplies for optimal performance.

High-quality components for precise sound

Precision resistors, temperature-stable capacitors, and more than 10 tantalum capacitors ensure a stable power supply—resulting in better channel balance, greater dynamics, and rich detail reproduction.

Ultra-precise clock technology

Custom femtosecond crystal oscillators and a 5th-generation FPGA deliver extremely low jitter and precise timing for PCM and DSD, ensuring flawless digital playback.

Versatile outputs

  • 3.5mm & 4.4mm line output: For active speakers or amplifiers
  • SPDIF coaxial output: Low-jitter digital output for external DACs
  • USB audio output: Use the M21 as a high-res streaming source

Long battery life & fast charging

The 4000 mAh battery offers up to 15 hours of playback time. Thanks to 20W PD fast charging, you can also charge quickly during short breaks.

(PD charging only via the POWER IN port)

Translated with DeepL.com (free version)