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Professional Hi-Fi DAC for Audiophiles

XMOS XU208-128-QF48

8 cores up to 500MIPS, compatible with USB 2.0.

Ultra-Quiet Power

Ultra-low noise, high PSRR LDO designed to power Hi-Fi applications.

RCA Connector

High-quality RCA connectors, let you enjoy audio with delicate, clear, powerful and rich sound details.


The industry's highest performance 32-bit mobile DAC with unprecedented dynamic range and ultra-low distortion.

Accurate Low-Noise Clock

Ultra-low phase noise crystal oscillator with excellent phase noise characteristics.

Compatible Audio File Formats

APE, FLAC, OGG, WAV, ACC, ALAC, MP3, WMA, DSD, and more!


The Khadas Tone Board is a USB external Hi-Fi sound card specially developed for Khadas VIM SBCs by Khadas. Its superior performance and compatibility take the audio/visual experience to a whole new level. We integrated the advanced XMOS multi-core RISC micro-controller and ESS flagship 32-bit stereo mobile audio DAC ES9038Q2M into a small PCB. At the same time, we selected three independent high-performance OPAs and four ultra-low phase jitter oscillators for the audio system. Each power path is controlled by a separate ultra-low noise CMOS linear regulator with an OPA of ± 5.5V. In addition to the powerful hardware configuration, we also maximize the performance through excellent PCB design.


Data from ESS professional labs

Two Versions

Generic and VIM editions


Flexible I/O supports development

Khadas aims to gradually realize the ideas and dreams of makers to help them grow. The two versions of the Tone Board's RCA output interface are the same, both have 2 RCA for analog output @ 2.0Vrms, and 1 RCA for S/PDIF input or output.



  • x1 30-pin FPC connector for 8-channel analog output expansion

  • x2 10-pin FPC connectors for OLED display and I2S expansion



  • x1 40-pin female connector for VIM

  • x1 20-pin SMT header for debugging XMOS and VIM.

Users can directly connect their Tone Board to the PC via the USB-C interface, and the Tone Board is the ideal choice for audio developers. Khadas' New VIM Heatsink can also be used with VIM and Tone Board.


Tone board supports multiple oses