At the heart of the FiiO M21 beats an advanced acoustic core that integrates a quad DAC 4 × Cirrus Logic CS43198 in a fully balanced design. This combination, along with the 2 × OPA1692 and 2 × SGM8262-2 amplifiers, ensures stunning detail, zero distortion, and an exceptionally wide dynamic range. The device supports full MQA full decoding and All to DSD technology, allowing you to listen to your favorite tracks exactly as they were recorded in the studio. The dual custom femtosecond crystals guarantee absolute timing without digital noise.
The portable digital music player FiiO M21 is designed to deliver excellent studio-quality sound in a sleek and ultra-thin body. It features the advanced Qualcomm Snapdragon 680 octa-core processor and runs customized Android 13, combining raw processing power with high-quality audiophile components for seamless playback.
At its core, the portable FiiO M21 music player is equipped with dual top-tier Cirrus Logic CS43198 DACs, paired with dual SGM8262 amplifiers in a fully balanced design. This setup ensures stunning clarity, extremely low distortion, and an extensive dynamic range, allowing you to rediscover your entire music library without loss of detail.
The FiiO M21 supports impressive output power of 700mW+700mW in balanced mode, effortlessly driving demanding headphones. Three gain levels (low, medium, high) perfectly adjust to any headphones.
Top Audio Architecture with Quad DAC
At the heart of the FiiO M21 beats an advanced acoustic core that integrates a quad DAC 4 × Cirrus Logic CS43198 in a fully balanced design. This combination, along with the 2 × OPA1692 and 2 × SGM8262-2 amplifiers, ensures stunning detail, zero distortion, and an exceptionally wide dynamic range. The device supports full MQA full decoding and All to DSD technology, allowing you to listen to your favorite tracks exactly as they were recorded in the studio. The dual custom femtosecond crystals guarantee absolute timing without digital noise.
Unstoppable Power and Adaptability for Every Headphone
Despite its extremely slim and compact body, the FiiO M21 hides enormous power reserves inside. At the balanced 4.4mm output, it achieves an impressive power of ≥950mW + 950mW at 32Ω in Super High Gain mode, driving even the most demanding over-ear headphones on the market with incredible ease. With an impedance adjustment range of 8–350 Ω for both the single-ended and balanced outputs, you can connect everything from sensitive in-ear monitors (IEMs) to large high-end headphones. Additionally, the DAPS digital system keeps the signal crystal clear at every volume level.
Ultra-fast Android 13 and Premium Connectivity
The FiiO M21 is powered by an octa-core Qualcomm Snapdragon 680 processor with 4GB RAM, offering an exceptionally smooth user experience through the customized Android 13 operating system. It supports multiple functions such as Pure Music, AirPlay, USB DAC, and Bluetooth Receiver for maximum flexibility. In terms of wireless connectivity, it features Dual-Band Wi-Fi, is Roon Ready, and supports bidirectional Bluetooth 5.0 with top codecs LDAC, aptX HD, and LHDC. As a USB DAC, it reaches sampling rates up to 384kHz/32bit and DSD256 Native, upgrading any computer.
Technical characteristics
Processor and system
- Operating system: Android 13
- Processor: Qualcomm Snapdragon 680 (6 nm)
- RAM: 4 GB
- Internal storage: 64 GB
- External storage: microSD up to 2 TB
Digital-to-analog converter
- Converters: 4x Cirrus Logic CS43198
- Architecture: fully balanced 8-channel output
- MQA decoding: 8x built-in
- Femtosecond clocks with 5th generation FPGA
- Shielded digital/analog separation
Sound performance
- Signal-to-noise ratio: ≥ 126 dB (A-weighted)
- Total harmonic distortion + noise: < 0.0003%
- Output impedance: < 1 Ω
- Maximum output power:
- 950 mW + 950 mW (32 Ω, balanced)
- 405 mW + 405 mW (32 Ω, unbalanced)
Connectivity and outputs
- Analog outputs: 3.5 mm unbalanced / 4.4 mm balanced (PO / LO)
- Digital outputs: SPDIF coaxial (3.5 mm) / USB audio
- Bluetooth 5.0: LDAC, LHDC, aptX HD, AAC, SBC (transmit / receive)
- Connections: 2 dedicated USB-C ports
Power supply and battery life
- Battery: 4000 mAh
- Battery life: 15 hours (unbalanced), 12.5 hours (balanced)
- Charging: PD 2.0 / 3.0 (20 W) via USB-C
- Patented desktop mode: external power supply without battery use
- Dual power supply: portable mode / desktop mode with battery protection
Display and design
- Display: 4.7-inch HD
- Materials: aluminum shell + AG glass back
- Design: retro Walkman style with optional cassette shell
- Dimensions: 121 × 68 × 17 mm
- Weight: 193 g
- Available colors: Titanium Gold, Dark Blue
Advanced features
- Customizable physical buttons
- RGB LED
- Audiophile components: thin-film resistors, tantalum capacitors
- Improved thermal dissipation and insulation
- Optimized digital accuracy
Package contents
- FIIO M21 player
- Protective case
- Pre-installed screen protective film
- USB-C cable
- Quick start guide
- Warranty card
- Type
- MP3 Player
- Memory Capacity
- 64 GB
- Touch Screen
- Yes
- Screen Dimension
- 4.7 "
- Additional Feautures
- Memory Card, Bluetooth, USB
- Colour
- Gold
Important information
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.