AUNE BU1 Fully Discrete Portable DAC Headphone Amplifier

Fully Discrete Hi-Res Multi-Scenario

The BU1 is a high-quality portable DAC with a headphone amplifier, focusing purely on sound quality. It supports up to 32bit/768k and DSD512 decoding, with a fully discrete amplifier. The BU1 is compatible with Apple/Android devices and portable music players, making it suitable for various scenarios.

Best Partner for Your Smartphone

With smartphones supporting higher resolution music files, the BU1 becomes an essential portable Hi-Res DAC and headphone amplifier. Connect your phone to the BU1, and instantly transform it into a high-fidelity music player.

Add the Unique Flavor of Fully Discrete to Your DAP

The BU1 can be connected to portable music players via USB, providing the special flavor of a fully discrete amplifier for an enhanced listening experience.

Reproduce Master-Tape Level Music on Your Computer

Connect the BU1 to your computer to decode PCM 768k and DSD512 files, and enjoy vivid, master-tape-level music through active speakers or headphones.

Enjoy Higher Fidelity Phone Entertainment

Enhance your enjoyment of concert videos, movies, and games on your phone with the BU1. It delivers higher fidelity and a more immersive experience.

Rigorous Hardware Selection

The BU1 uses top-tier components such as the SR series PCB, BI conductive film potentiometer, ultra-low-jitter oscillator, and ceramic COG capacitors, all chosen for superior sound quality and lower distortion.

Wide Dynamic Range with Positive and Negative Voltage Regulator

The BU1 employs the classic B1S' positive and negative voltage regulator circuit, ensuring optimal performance and wide dynamic range.

Fully Discrete Amp Circuit for Superior Transients

Using a fully discrete, DC-feedback amp circuit with ON high-performance transistors, the BU1 delivers excellent high frequencies and transient response.

A Beautiful Work of Art

Crafted from a solid block of aluminum via CNC, the BU1 features a no-screw design with brushed finish and concentric knob/buttons, making it as visually stunning as it is functional.

Outstanding Balance Control with Ideal Battery Life

The BU1’s 4000mAh battery guarantees ideal performance, offering up to 8 hours of playtime on low gain. It provides excellent current, driving ability, and sound quality in a compact body.

Aesthetic Design

The design philosophy emphasizes symmetry and balance, incorporating a rounded letter logo for great aesthetics.

Excellent Specifications

Designed by the creator of the classic B1, the BU1 achieves output distortion as low as 0.00076% and noise as low as 1.97uV, ensuring a dark background and rich details.

Professional Tuning

Tuned based on real instruments and musical content, the BU1 offers a natural and musical sound signature, delivering an authentic audio experience.