FIIO JIEZI B Ultracompact Portable DAC & Headphone Amplifier

• 10-band high-precision PEQ

• PCM 384 kHz / DSD256 decoding

• 4.4 mm jack output

The FiiO JadeAudio JIEZI B DAC AMP features a robust aluminum-magnesium alloy body and a 4.4 mm output.
It integrates a USB connector, DSP, ADC, and DAC, and supports high-resolution decoding up to PCM 32-bit / 384 kHz and DSD256.
The built-in high-precision 10-band PEQ allows detailed sound customization, with frequency response curves adjustable via the FiiO Control app or web interface—offering professional-level audio settings in a compact design.

Elegant Design with Cutting-Edge Technology

Masterfully crafted for premium quality
Classic motifs inspired by Eastern culture, compact size, yet delivering a boundless soundstage
Audiophile DSP and 10-band PEQ
The integrated audiophile-grade DSP chip enables precise PEQ control, as found in high-end audio equipment.
You can customize the 10-band PEQ using the FiiO Control app or web interface, save your audio profiles, and easily share them via the cloud.

Three Integrated Technologies in an Ultra-Compact Body

JIEZI combines a powerful USB controller, a high-sampling-rate DAC/ADC, and a high-precision DSP.
It supports PCM 32-bit / 384 kHz and DSD256 decoding and delivers impressive performance at a competitive price.

4.4 mm Unbalanced Output with Common Mode Drive Architecture

The JIEZI B, equipped with a 4.4 mm jack, is a portable DAC/amp in dongle format for users with 4.4 mm headphones.
It uses a single-ended output architecture with common mode drive, delivering output power comparable to that of balanced output devices.

Lightweight, Seamless Design with Aluminum-Magnesium Construction

The integrated cable and unibody design allow for a smooth and seamless connection while keeping the overall build lightweight and compact.
The aluminum-magnesium alloy structure ensures a premium feel and long-lasting durability.

Golden Ring – A Symbol of Art and Tradition

The outer casing resembles a golden ring, decorated with auspicious cloud patterns and geometric designs.
Although as small as a mustard seed and fitting in the palm of your hand, it delivers limitless listening enjoyment as vast as Mount Sumeru.
Laser-engraved patterns add a multi-dimensional 3D effect, giving life to the design concept while offering a clear and durable texture.

Full Compatibility, Worry-Free

Enjoy broad plug-and-play compatibility with Android, iOS, HarmonyOS, Windows, macOS, and Linux devices.
Thanks to support for UAC 2.0 and UAC 1.0, it also works flawlessly with gaming consoles such as the Nintendo Switch and PS5, making it highly versatile.

App and Web Control for Advanced Features

Compatible with the FiiO Control app on Android and with a web interface on computers, it unlocks a wide range of advanced features:
Switch between customizable PEQ presets, toggle UAC versions, adjust volume precisely, and much more.
⚠️ Due to system limitations, iOS devices cannot connect to or control the JIEZI via the FiiO Control app.

Hi-Res Audio Certified, Designed for Superior Sound

This product comes from FiiO, a renowned manufacturer known for its commitment to hi-fi audio.
It maintains FiiO’s professional standards and attention to detail in every aspect of sound design, ensuring an outstanding listening experience.

Premium Cabling – Inside and Out

JIEZI uses high-purity, palladium-plated, oxygen-free copper, ensuring low impedance, minimal signal loss, excellent noise resistance, and stable transmission.
Its outer double-sleeve—made of braided flexible silicone—offers durability while maintaining flexibility.

From a Trusted Brand – Guaranteed Quality and Support

Jade Audio is a subsidiary of FiiO. All products undergo FiiO's strict quality controls and reliability testing and are backed by FiiO's customer service guarantee.

Technical Specifications

• Product Type: DAC and headphone amplifier

• Colors: Black-Gold / Black-Red

• Weight: Approx. 6 g

• Input: USB Type-C cable

• Output: JIEZI B – 4.4 mm single-ended jack

• Output Power:

  • L+R ≥ 49 mW + 49 mW (16 Ω / THD+N < 1%)

  • L+R ≥ 34 mW + 34 mW (32 Ω / THD+N < 1%)

• SNR: 104 dB

• THD+N: 0.0034 %

• Noise Level: 5.3 μV

• Crosstalk: -61 dB

• Output Impedance: <0.5 ohms

• Decoding Support: Up to PCM 32-bit / 384 kHz, DSD256

• FiiO Control: Supported

• Dimensions: Approx. 100 mm (including cable)

• Inline Calling: Supported (not compatible with some smartphones)

• PEQ Setting: Supported

What’s in the Box

• Device ×1

• User Manual ×1

• Warranty Card ×1