FiiO JM21 (4GB + 64GB) Portable High-Resolution Lossless Music Player

The FiiO JM21 is a powerful portable Hi-Res digital audio player that combines flagship audio architecture with a modern Android 13 operating system and Qualcomm Snapdragon 680 processor. Designed for music enthusiasts seeking premium sound quality without flagship pricing, the JM21 features dual Cirrus Logic CS43198 DACs, a fully balanced audio circuit, dual SGM8262 op-amps, and FiiO's proprietary DAPS (Digital Audio Purification System) for bit-perfect audio playback.

Powered by an 8-core Snapdragon 680 processor built on an advanced 6nm process, the JM21 delivers smooth operation for local music playback and popular streaming services while maintaining excellent battery efficiency. The ultra-slim 13mm chassis houses a vibrant 4.7-inch HD touchscreen, expandable microSD storage support up to 2TB, and both balanced and single-ended headphone outputs capable of driving a wide range of headphones and in-ear monitors.

With Android Mode, Pure Music Mode, USB DAC functionality, Bluetooth receiving capability, USB audio output, SPDIF digital output, and line-out connectivity, the JM21 adapts seamlessly to virtually any listening environment, from portable personal audio to desktop hi-fi systems.

Features

• Portable Hi-Res lossless digital audio player
• Qualcomm Snapdragon 680 octa-core processor
• Advanced 6nm fabrication process
• Android 13 operating system
• 4GB RAM and 64GB internal storage
• Approximately 52GB usable internal storage
• Dual Cirrus Logic CS43198 flagship DACs
• Dual SGM8262 high-performance op-amps
• Fully balanced audio architecture
• FiiO DAPS (Digital Audio Purification System)
• 5th-generation FPGA audio processing
• Dual custom femtosecond crystal oscillators
• Bit-perfect playback with original sample-rate preservation
• Global SRC bypass design
• 4.7-inch HD touchscreen display
• Ultra-thin 13mm chassis design
• 3 selectable gain levels
• Independent volume curves for low, medium, and high gain modes
• 4.4mm balanced headphone output
• 3.5mm single-ended headphone output
• 3.5mm coaxial digital output
• Line-out functionality through both headphone outputs
• USB Audio digital output
• USB DAC mode
• SPDIF digital output support
• Bluetooth receiving mode
• Supports major streaming music applications
• Wi-Fi music streaming support
• Supports DLNA
• Supports AirPlay
• Supports microSD cards up to 2TB
• Aluminum alloy and plastic construction
• PET screen protector pre-installed
• Transparent protective case included

Specifications

General

• Model: JM21
• Color: Sky Blue, Black
• Operating System: Android 13
• Processor: Qualcomm Snapdragon 680
• Architecture: Octa-Core Kryo 265
• Process Technology: 6nm
• RAM: 4GB
• Internal Storage: 64GB
• Usable Storage: Approximately 52GB
• Storage Expansion: microSD Card Slot, Up to 2TB
• Working Modes: Android Mode, Pure Music Mode, USB DAC Mode, Bluetooth Receiving Mode

Display

• Display Size: 4.7-Inch
• Resolution: 750 × 1334 HD
• Touchscreen Display

Audio Architecture

• DAC Chips: Dual Cirrus Logic CS43198
• Op-Amps: Dual SGM8262
• Audio Design: Fully Balanced
• Audio Processing: 5th-Generation FPGA
• Clock System: Dual Custom Femtosecond Crystal Oscillators
• Digital Audio Purification System (DAPS)
• Bit-Perfect Playback Support
• Segmented Power Supply Architecture

Wireless Connectivity

• Wi-Fi: 2.4GHz / 5GHz
• Bluetooth Version: 5.0
• Bluetooth Transmission Codecs: SBC, AAC, aptX, aptX HD, LHDC, LDAC
• Bluetooth Reception Codecs: SBC, AAC, LDAC
• Supports DLNA
• Supports AirPlay
• Supports Wi-Fi Music Transfer

Audio Outputs

• 4.4mm Balanced Headphone Output / Line Out
• 3.5mm Headphone Output / Line Out / Coaxial Output
• USB Type-C Audio Output
• SPDIF Digital Output

Digital Audio Performance

• Local Decoding: Up to 384kHz / 32-Bit PCM
• Native DSD Support: DSD256
• USB DAC: Up to 384kHz / 32-Bit PCM
• USB DAC Native DSD Support: DSD256
• USB Audio Output: Up to 768kHz / 32-Bit PCM
• USB Audio DSD Support: DSD512 (DoP / D2P / Native)
• Coaxial Output: Up to 384kHz / 24-Bit PCM
• Coaxial DSD Support: DSD128 (DoP / D2P)

Amplifier Performance

• Single-Ended Output Power: ≥245mW + 245mW @ 32Ω (THD+N < 1%)
• Balanced Output Power: ≥700mW + 700mW @ 32Ω (THD+N < 1%)
• Signal-to-Noise Ratio: ≥130dB
• Noise Floor: <1.5μV
• Output Impedance: <1Ω
• Total Harmonic Distortion + Noise (THD+N): <0.0006%
• Three Gain Levels: Low, Medium, High

Battery

• Battery Capacity: 3100mAh
• Battery Life (Single-Ended): Up to 16 Hours
• Battery Life (Balanced): Up to 12.5 Hours
• Charging Time: Approximately 2.5 Hours (5V/2A)
• USB Type-C Charging

Physical Specifications

• Dimensions: Approximately 120.7 × 68 × 13 mm
• Weight: Approximately 156 g (Excluding Protective Case)
• Construction: Aluminum Alloy and Plastic

What's in the Box

• FiiO JM21 Digital Audio Player
• Pre-Applied PET Screen Protector
• Transparent Protective Case
• USB Cable
• Quick Start Guide
• Warranty Card