M21 -High-Res Lossless Music Player

Discover the next generation of portable audio with the FiiO M21—a high-performance music player crafted for discerning audiophiles.

At its core, the M21 is powered by a cutting-edge eight-core Snapdragon 680 processor and runs on Android 13, delivering smooth performance and a modern user experience. It features four CS43198 DAC chips arranged in a matrix configuration, ensuring exceptional audio clarity and precision.

Designed for both mobility and versatility, the M21 supports dual power modes—portable and desktop—offering up to 950mW of output power. This makes it equally capable whether you're listening on the move or using it as a stationary setup.

The device features a 4.7-inch high-definition display, providing a clean, intuitive interface for navigating music and apps. With dual headphone outputs—3.5mm single-ended and 4.4mm balanced—it supports a wide range of headphones and audio setups.

With its powerful hardware, refined design, and audiophile-grade performance, the FiiO M21 sets a new benchmark in high-fidelity portable music players.

Physical Specifications

• Size: 68mm x 121mm x 17mm
• Weight: ~193g

Compact and pocketable, similar to a small smartphone but thicker.

Internal Hardware

• Main Controller (CPU): Qualcomm Snapdragon 680
• System: Android 13
• RAM: 4GB
• Storage: 64GB total / ~52GB usable
• Expandable Storage: Supports TF card (microSD) up to 2TB

A mid-range chipset that balances power efficiency with adequate performance for audio playback and apps.

Battery and Power

• Battery Capacity: 4000mAh
• Battery Life:
• 15h (Single Ended Output)
• 11.5h (Balanced Output)
• Charging: Supports PD2.0, PD3.0, and PPS fast charging
• Dual USB-C Ports:
• One for charging/data
• One for dedicated power input

This offers flexibility for charging while using USB peripherals or DACs.

Display

• Screen: 4.7-inch, 750x1334 resolution

Compact and similar to iPhone 6/7 screen specs.

Audio Hardware

• DAC Chips: 4x CS43198 (Cirrus Logic)

High-quality DACs known for excellent audio fidelity.

Audio Outputs

• Single-ended: 3.5mm PO/LO/SPDIF
• Balanced: 4.4mm PO/LO

Supports a wide range of headphones and configurations (line out, digital out).

Output Power

Here are the key power output ratings in different modes:

Audio Performance

• SNR (Signal-to-Noise Ratio): ≥126dB (A-weighted)
• THD+N (Total Harmonic Distortion + Noise): <0.0003%
• Noise Floor: <1.6μV
• Output Impedance: <10Ω

Top-tier specs—this will pair well with high-end IEMs and headphones, offering clean and powerful output.

Wireless

• Bluetooth 5.0
• Transmission Support: AAC, SBC, aptX, aptX HD, LDAC, LHDC
• Reception Support: SBC, AAC, LDAC

Supports both sending and receiving high-res audio over Bluetooth.

Summary

This device is a feature-rich digital audio player, ideal for audiophiles looking for:

• High power output to drive demanding headphones
• Excellent DAC performance
• Expandable storage
• Android app support (e.g., streaming apps)
• Versatile I/O and wireless options

Flagship Performance with Snapdragon 680

At the heart of the M21 is the Qualcomm Snapdragon 680 processor, delivering smooth, responsive performance with low power consumption. Combined with the advanced features of Android 13, it offers a seamless and modern user experience.

Quad DAC Design for Audiophile Sound

Equipped with four CS43198 DACs in a matrix configuration, the M21 delivers rich, detailed, and well-balanced audio. It's finely tuned to handle both low and high frequencies with precision, ensuring a faithful reproduction of every note.

Dual-Mode Power Supply for Versatile Listening

The M21 supports both portable and desktop listening modes. Its dual power systems provide up to 21Vpp of peak voltage in desktop mode and 950mW of output power in mobile use, enabling it to drive everything from sensitive IEMs to power-hungry headphones.

Flexible Dual Headphone Outputs

For maximum connectivity, the M21 features both a standard 3.5mm output and a 4.4mm balanced output, giving users the freedom to connect a wide variety of headphones and audio gear.

Extended Battery Life with Fast Charging

A robust 4000mAh battery powers up to 15 hours of continuous playback in portable mode. With support for 20W PD fast charging, the M21 is always ready to go after a short recharge.

High-Resolution Audio Support

The player handles high-res audio formats with ease, including PCM up to 32-bit/384kHz and native DSD playback, delivering studio-quality sound across all genres.

Retro-Inspired Magnetic Tape Style Case

Add a nostalgic touch with the optional custom protective case designed to resemble a classic cassette tape. It offers both vintage appeal and enhanced protection for your device.

Intuitive 4.7-inch HD Touchscreen

Navigate your music, settings, and apps effortlessly with the M21’s high-definition 4.7-inch touchscreen, designed for smooth interaction and clear visibility.