Reach Higher Level

The new X-SPDIF3 USB digital audio interface allows your computer, tablet or mobile phone to easily output high-quality digital audio signal to peripheral digital audio devices, transmit in USB asynchronous mode, and achieve from USB input to Optical/Coaxial/AES/IIS-LVDS output interface conversion. Compared with the previous generation, the IIS-LVDS output isolation is added, which completely isolates the digital output from the ground wire of the USB end, and bids farewell to the annoying noise of the USB front end. In addition, it supports up to 32Bit/768kHz PCM signal and 1Bit/DSD512 signal output, achieving an excellent output quality from both PC and mobile devices.

Filter the noise of digital audio signal

X-SPDIF3 converts audio data to S/PDIF or IIS-LVDS signals from USB connection, which can be called a "problem eliminater" for digital signals. When your computer, mobile phone, or tablet does not have a coaxial or optical fiber interface, you can use the X-SPDIF3 for interface conversion, to let your existing mobile devices output high-quality digital audio signals to the DACs, During this process, the audio signal will be optimized and reformed, and the "impurity" from the front-end device will be isolated, providing perfect and pure digital audio signal to the back-end equipment, effectively improving the sound quality.

Femtosecond Clock

With 2 femtosecond clocks from Accusilicon as the reference clock source to accurately restore the nature of music. Working for 44.1kHz and 48kHz and their multiples of sampling rate respectively, the FPGA automatically performs frequency division and switching control, it is powered by an independent ultra-low noise LDO. The clean power supply allows you to enjoy music without worries.

IIS-LVDS Definition

The X-SPDIF3 can be configured to 4 kinds of IIS-LVDS interface definitions by toggling the switch on the bottom of the unit, to match various back-end devices. Enables the X-SPDIF3 has a wider range of applications.

Dual Clock Mode

With the switches on the button of the unit, the X-SPDIF3 can be configured to 2 different clock output modes, to match different back-end devices. Simply toggle the switches, the fun of Hi-Fi is at your fingertips.

Convert Audio Codes Freely

The X-SPDIF3 is equipped with a DoP conversion function, which converts DSD DoP codes to Native DSD, and output through the IIS-LVDS port directly. Easily to achieve the code conversion of DSD, and provide a new solution for the DACs that only support native DSD capabilities.

External Power Supply

Both the bus power from USB connection and external power supply are available for X-SPDIF3, a dedicated LED indicates the power status. When connecting to devices with weak power supply capabilities such as mobile phones and tablets, you can add an external power supply to drive the X-SPDIF3 working stably. The USB bus power will be cut off when an external power supply is connected.

CNC Aluminum Chassis

In order to achieve a better electromagnetic shielding performance, reduce the effects of mechanical vibration, X-SPDIF3 follows the classic design of 「Matrix Audio」, using an aluminum CNC chassis, carefully crafting every corner, showing the charm of industrial aesthetics. Isolate the interference from peripheral devices, helping you to create a pure PC Hi-Fi audio system.


Supported Sample Rate


PCM 16-24Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz

DSD64 (DoP) 


PCM 16-32Bit /44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz,

352.8kHz, 384kHz, 705.6kHz, 768kHz

DSD 64/128/256/ (DoP), DSD 64/128/256/512 (Native) 

NOTE: Please see the X-SPDIF3 user manual for the IIS-LVDS definition.

System Support

Windows7/8/8.1/10/11 system needs to install the supplied driver.

Mac OS X10.6.4 or above without installing the driver.

Most Android devices can be used via OTG cable.

The iOS devices can be used via Lightning to USB Camera Kit.

Weight and size

Weight1 kg (2.2 pounds)

Width: 142 mm (5.59 inches)

Depth: 124 mm (4.88 inches)

Height: 38 mm (1.53 inches)

Power Specs

Power Supply Specs

USB bus power supply: 5V/500mA

External power supply: DC 12V, ≥400mA 

Power supply plug: Outer diameter 5.5mm; inner diameter 2.1mm (+ for inner, - for outer)


The input power supply should not be higher than 12V, otherwise the product could be damaged.

The USB bus power supply will be disconnected when the external power supply is connected. 

An external power supply is required when using the product with low USB output current devices such as mobile phones or tablets.


USB cable


Quick start guide


Warranty card


For improvement purpose, specifications subject to changes without prior notice.

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