High-performance Low Noise USB Digital Interface

    High-performance Low Noise USB Digital Interface
    Fully Isolation
    2nd Generation Clock Synthesizer With Ultra-Low Noise
    Independent CPLO For Signal Shaping
    Excellent Performance & Wide Compatibility
Regular price $499.00 USD
Sale price $499.00 USD Regular price

High Quality USB Interface

This GUSTARD U18 USB digital interface offers a high quality design, ensuring excellent performance and accurate sound reproduction. XU216 from XMOS has 16 cores, which brings rich resources and a smooth experience.

Fully Isolation

Complete grounding isolation is achieved by 200 Mbps isolator to eliminate all interference from your PC.

2nd Generation Clock Synthesizer With Ultra-Low Noise

To generate an extremely accurate clock signal, the U18 uses two Accusilicon AS338 oscillators with a jitter of only 38fs and a Gustard K2 ultra low noise clock synthesizer. Moreover, the power supply of the clocks is done by a LT3045 linear regulator with a noise level of only 0.8µVrms. The power supply stage uses a large custom toroidal transformer, optimized for audio use.

Independent CPLO For Signal Shaping

In the CPLD for signal processing, the isolated IIS signal is reshaped to remove the jitter introduced by the isolator.

Excellent Performance & Wide Compatibility

For its audio outputs, the Gustard U18 offers Toslink Optical, Coaxial, AES and I2S via HDMI. On this last output, it supports high-resolution audio streams up to PCM 32bit 768kHz and DSD512. Moreover, the I2S pinout is configurable in 4 modes to adapt to most devices on the market. Finally, we note the presence of an MCLK input and WCK output on BNC.

Inside the Box

  • 1 x GUSTARD U18
  • User Manual

1 Year Warranty

The GUSTARD U18 Comes with a 1 year warranty on the AMP & DAC only. Warranty doesn't apply to the included accessories.

Technical Details

Product type
Digital interface
1x USB-B
1x BNC 10MCLK (50Ω, 0dBm-20dBm)
1x Coaxial 75Ω
1x AES 110Ω
1x OpticalToslink
1x I2S via HDMI
1x Word Clock output via BNC 75Ω
USB interface
Supported sampling rates
I2S : PCM up to 32bit 768kHz, Native DSD up to DSD512
Coaxial / AES : PCM up to 24bit 384kHz, DSD DoP up to DSD128
Optical Toslink : PCM up to 24bit 192kHz, DSD DoP up to DSD64
Word Clock frequency
PCM : 44.1k-768k
DSD : 2.82M-22.57M
Output level
Coaxial : 500mVp-p @ 75Ω
AES : 2.1Vp-p @ 110Ω
Word Clock : 3.3~5Vp-p @ 100kΩ

Processing Time

This product is in Pre-order period. Pre-orders are provided for items that have not reached us and will take some time to be shipped out.

Pre-order Period: 7-10 working days


  • No cancellation of orders once ordered.
  • All orders to be shipped out sequentially.

Authentic Products

Linsoul Audio is the authorized distributor. All products are authentic and genuine.

Worldwide Free Shipping

We are located in China but send our products worldwide for free. T&Cs apply.

1 Year Warranty

We provide 1 year warranty for the all products except the cables and accessories*.

Online Support

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30-Day Return Policy

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