TONE 1

Professional Hi-Fi DAC for Audiophiles

  • ES9038Q2M

    ESS' flagship audio DAC provides unparalleled decoding quality.

  • XMOS XU208

    XMOS's multi-core RISC controller provides rock-solid USB connectivity.

  • Professional Tuning

    Professional Instrument's APx555 was used for tuning the Tone Board.

  • Lab Testing

    THD + N, SNR, DNR, crosstalk and frequency response were measured.

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.

ESS ES9038Q2M DAC

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!

DESCRIPTION

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.

PERFORMANCE

DATA FROM ESS PROFESSIONAL LABS

TWO VERSIONS

GENERIC AND VIM EDITIONS
  • Generic Edition

    The universal version is designed to work with a standalone Mac, PC or SBC via the built-in USB-C data and power port. There are additional un-soldered GPIO headers on the board.​

  • VIM Edition

    The VIM version is designed to "dock" with a Khadas Edge-V, VIM3L, VIM3, VIM2 and VIM1 SBC to form a complete Hi-Fi audio computer device. You can also use radiators and fans with the Tone Board.​

INTERFACES

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.

 

Expansion:

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

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

 

Other:

  • 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.

COMPATIBILITY

TONE BOARD SUPPORTS MULTIPLE OSES

SPECIFICATIONS

[1] Android supports only 44.1KHz output due to the Sample Rate Conversion(SRC) resampling implementations.
[2] Will also support other Single Board Computers (SBCs).

Excellent PCB design

  • Reasonable PCB stackup and layout

  • 4-layer immersion gold process

  • Excellent analog signal quality and power integrity

Professional tuning

  • Tuning with professional instrument APx555

  • High-performance modular two-channel audio analyzer

  • Latest performance and versatility testing

AUDIOPHILE AUDITION

  • Thanks to all music enthusiasts who provided us with valuable feedback!

HIGH QUALITY CABLES

  • Our team tested a variety of cables to ensure audio quality

  • We finally chose a custom RCA to 3.5mm audio adapter

ACCESSORIES

CABLES & SBCS FOR A COMPLETE EXPERIENCE

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© 2020 Khadas, Shenzhen Wesion Technology Co., Ltd.

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