Snapdragon 680 Octa-Core Performance

The M21 is powered by a 6nm Snapdragon 680 octa-core SoC running Android 13, offering smooth operation, low power consumption, and efficient multitasking. Its 4GB RAM and 64GB storage (expandable via microSD up to 2TB) provide ample space for high-resolution audio playback.

4x CS43198 DACs & Dual Balanced Amplifiers

Equipped with four CS43198 DAC chips, the M21 achieves an eight-channel fully differential output, unlocking the full potential of headphones with exceptional dynamic performance and high anti-interference capability. The headphone amplifier uses a two-stage design: the first stage handles voltage amplification, while the second stage manages current expansion, ensuring purer sound and rich, detailed audio reproduction.

Desktop & Portable Dual Power Modes

The M21 supports portable mode with standard voltage and desktop mode powered entirely by an external supply, preserving battery health. High-voltage "super gain" mode provides up to 950mW output, enabling desktop-level power for a wide range of headphones and earphones.

Retro Cassette-Style Protective Case & Premium Build

The included custom retro cassette-style case paired with a 4.7-inch HD screen, aluminum alloy body, and AG frosted glass back offers a nostalgic look, comfortable grip, and durable protection. Independent shielding of digital and analog circuits ensures pure, low-noise audio reproduction.

High-End Hi-Fi Components

The M21’s audio circuit uses high-precision thin-film resistors and low-drift capacitors, providing stable, refined sound with improved consistency across left and right channels and all frequency ranges. Over 10 low-impedance, high-capacity tantalum capacitors support DACs and headphone amplifiers, delivering abundant energy and dynamic, detailed audio.

Long-Lasting Battery Life

Feature Description: The M21 is powered by a 4000mAh high-voltage battery, providing up to 15 hours of playback in single-ended mode and 12.5 hours in balanced mode. With support for 20W PD fast charging, it ensures uninterrupted listening during long commutes or extended sessions, letting you fully enjoy high-resolution music anytime, anywhere.

Technical Details

Color
Titanium gold, Dark blue
Dimensions
About 68mm x 121mm x 17mm
Weight
About 193g
SoC
Snapdragon 680
OS
Android13
DAC
CS431984
Display
4.7-inch (750x1334) fully laminated screen
Battery capacity
4000mAh
Charging
Supports PD2.0 and PD3.0 PPS fast charging
Battery life
15h single-ended, 12.5h balanced
RAM
4GB
Internal storage / available capacity
64GB / about 52GB
Storage expansion
Micro SD card, supports 2TB
Headphone outputs
Single-ended 3.5mm PO/LO/SPDIF + Balanced 4.4mm PO/LO
USB interfaces
Type-C USB3.0*1 (charging/data transmission) + Type-C POWER IN*1 (charging/independent power supply)
Inside the Box
  • Tempered film screen protector (pre-installed at factory) x 1
  • Protective case x 1
  • Warranty card x 1
  • Quick Start Guide x 1
  • USB data cable x 1
  • GPLV2 instruction manual x 1

30-Day Return Policy

You may return any non-customized product that is still factory sealed, within 30 days upon receiving it. For items that are damaged, incorrect, or faulty upon delivery, Linsoul will assess the issue and provide a solution accordingly.

1 Year Warranty

The FiiO M21 Comes with a 1 year warranty on the Digital Audio Players only. Warranty doesn't apply to the included accessories.

Processing Time

This product is currently in its pre‑order period. Pre‑orders apply to items not yet in stock, and shipping will begin once they arrive. Processing times are estimates only.

Pre-order Period:

  • No ETA, shipped out sequentially. Check with us.

Note:

  • No cancellation of orders once ordered.
  • All orders to be shipped out sequentially.

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