FiiO JM21 – Portable Hi-Res Music Player with Dual DAC Architecture

The FiiO JM21 is a compact hi-res music player built for modern audiophiles who want true high-fidelity sound anywhere. With a Snapdragon 680 processor, dual CS43198 DACs, balanced 4.4 mm output and Android 13, it blends streaming freedom with powerful wired performance. Its slim, lightweight design, LDAC Bluetooth support and long battery life make it a versatile everyday companion — available at Soundium.

Key Features

• Dual CS43198 DACs: Fully balanced audio architecture delivers clean, detailed and natural sound with excellent dynamics.
• 700 mW balanced output: Easily drives everything from sensitive IEMs to demanding full-size headphones.
• Snapdragon 680 processor: Smooth performance for streaming, browsing large libraries and running audio apps.
• Android 13 interface: Modern app support and familiar navigation with access to streaming services and custom playback tools.
• DAPS jitter control: Femtosecond crystal oscillators ensure ultra-low jitter and stable high-resolution decoding.
• Two-way Bluetooth: Transmit or receive LDAC, aptX HD, LHDC and more for wireless flexibility.
• Multiple outputs: 4.4 mm balanced, 3.5 mm single-ended/SPDIF and USB-C audio for any setup.
• Long battery life: Up to 12.5 hours using SE output, or 9.5 hours balanced.

Customer Benefits

The JM21 offers the freedom of a modern Android player with the sonic precision of a dual-DAC audiophile device. Its strong output power, low noise floor and clean tuning make it ideal for both portable listening and use as a USB DAC at home. Whether you stream in high resolution, play local files or connect wirelessly, the JM21 delivers a detailed and immersive sound experience in a slim, pocket-friendly form.

Quick Specs

• Dimensions: 12.07 × 6.8 × 1.3 cm
• Weight: 156 g
• Processor: Snapdragon 680 (8-core, 6 nm)
• RAM / Storage: 3 GB / 32 GB + microSD up to 2 TB
• Display: 4.7-inch HD (750 × 1334)
• Bluetooth: SBC, AAC, aptX, aptX HD, LHDC, LDAC
• DAC: Dual CS43198
• Outputs: 4.4 mm balanced, 3.5 mm SE/SPDIF
• SE power: 245 mW + 245 mW (32 Ω)
• Balanced power: 700 mW + 700 mW (32 Ω)
• Local decoding: PCM 384 kHz/32-bit, DSD256
• USB output: PCM 768 kHz/32-bit, DSD512
• SNR: ≥130 dB
• Noise floor: <1.5 μV
• Battery: 2400 mAh, 12.5 h SE / 9.5 h balanced

What’s in the Box

• FiiO JM21
• USB-C charging/data cable
• Quick start guide

Use Cases / Ideal For

Perfect for portable hi-res listening, streaming with premium apps, driving demanding headphones, wireless LDAC playback, USB DAC use with laptops and desktop systems.

Pros & Cons

✅ Pros:

• Powerful balanced output for its size
• Flagship-level DAC architecture with excellent SNR
• Clean, very low noise floor ideal for IEMs
• Android 13 for seamless streaming and app support
• Two-way Bluetooth with many high-res codecs

⚠️ Cons:

• Balanced mode reduces battery life
• Compact size limits on-device storage (microSD expansion solves this)
• No physical volume wheel for tactile control

The FiiO JM21 merges modern Android functionality with a powerful dual-DAC audio design, giving portable listeners a refined, high-resolution experience in a slim, lightweight player. Available at Soundium.