FiiO M21 Portable Music Player/DAC

🧾 Overview / Summary
The FiiO M21 is a premium portable digital audio player designed for audiophiles who demand high performance on the go. Featuring a Snapdragon SoC, quad DACs, and balanced amplification, it supports Android, pure music mode, and USB DAC functionality — combining versatility with pristine sound.

✅ Key Features
✅ Qualcomm Snapdragon 680 with 4GB RAM for seamless performance
✅ Quad CS43198 DACs and balanced amp section for ultra-clean output
✅ 4.7-inch bezel-less HD display in a compact titanium gold or dark blue chassis
✅ Supports Android, Pure Music, AirPlay, USB DAC, and Bluetooth receiving modes
✅ Dual microSD and internal 64GB storage expandable up to 2TB
✅ Up to 15 hours playback (3.5mm), 12.5 hours (4.4mm) on a single charge
✅ WiFi (DLNA, Roon Ready, AirPlay) and Bluetooth (LDAC, aptX HD) support
✅ MQA full decoding and ALL TO DSD feature for enhanced resolution

📊 Technical Specifications
Parameter Specification
Dimensions 68 × 121 × 17 mm
Weight ~193 g
Display 4.7" (750×1334)
Internal Storage (ROM) 64 GB (~52 GB available)
RAM 4 GB
Color Options Titanium Gold / Dark Blue
Battery Life (3.5mm) Up to 15 hours
Battery Life (4.4mm) Up to 12.5 hours
Charging Time ~1.5 h (PD3.0)
Output Power (PO, 32Ω) up to 405mW+405mW
Output Power (BAL, 32Ω) up to 950mW+950mW
SNR (BAL) ≥126dB
THD+N (BAL) <0.0005%
Frequency Response 20Hz–85kHz: <2dB
Noise Floor as low as <2uV
Max Sample Rate (USB) up to 768kHz/32bit, DSD512
Max Sample Rate (local) up to 384kHz/32bit, DSD256
WiFi & Bluetooth Dual-band WiFi, BT 5.0 with LDAC, aptX HD, AAC
Outputs 3.5mm SE / 4.4mm BAL / Coax / USB-C
Inputs USB DAC, Bluetooth Receiving

📦 What’s in the Box
📦 FiiO M21 Digital Audio Player
🔌 USB-C charging/data cable
📖 User manual
🛡️ Protective case (cassette-style, optional)

🔄 Compatibility
✔ Works with all standard 3.5mm, 4.4mm balanced headphones and IEMs
✔ Supports Windows, macOS, iOS, and Android as USB DAC
✔ Fully compatible with DLNA, Roon, AirPlay, Spotify, Tidal, and more
✔ Supports microSD cards up to 2TB

📦✈️ Shipping & Returns
📦 Insured worldwide delivery
🔄 14-day return policy
🛡️ 1-year manufacturer warranty

📝 Reviews
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