Please Note ... WE AIM TO SHIP THE SAME DAY BUT DUE TO COVID WAREHOUSE RESTRICTION YOUR ORDER MIGHT SHIP THE FOLLOWING DAY . *** Refer to Guides for stock information (no change as from the 8th April 2021) *** Any other enquiry please send email to



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Schiit UNISON USB Upgrade Card

Want a USB input that can plug easily into all popular sources without drivers—and deliver performance that can go head-to-head with all the crazy inconvenient options out there? Then you want to upgrade your Bifrost or Yggdrasil to Unison USB™. 

The new Unison USB input board features:

A completely unique USB input receiver based on a Microchip PIC32 microprocessor with Schiit's proprietary code.

Complete electromagnetic and electrostatic isolation.

Self-power by the DAC for the critical low-noise re-clocking and latching sections.

Precision local clocks for both 44.1 and 48k multiples.

NO SUPPORT FOR ANTIQUE WINDOWS. If you're not on Windows 10, stick to Gen 5.

The new Unison USB board is an upgrade for any Bifrost or Yggdrasil with the Gen 1, 2, 3, or 5 USB inputs, and now ships standard with every new Gungnir and Yggdrasil. Bifrost 2 uses Unison USB as standard with a unique Autonomy card.

Schiit Scheduling System Reduces Upgrade Time

Our convenient scheduling system that allows you to keep your Bifrost or Yggdrasil until we’re ready to do your upgrade immediately. Just place your order, and follow the steps in the series of emails. You’ll be notified when your order is accepted, when to send in your DAC, when the work is performed, and when it’s shipped back to you, for complete transparency.

Other Installation Options (self Installation *note)

Please note that by selecting this option, you are saying, "Yes, I am, or know, a competent electronics technician who does not need hand-holding for this installation, and I will not allow an inexperienced person to perform the upgrade, since I understand there are no user-serviceable parts inside."

2-Year Warranty

Unison USB upgrades done by us are covered by a 2-year warranty or the balance of the original factory warranty, whichever is greater. One caveat: We may refuse to do upgrades on heavily modified products.

*Note:  We will contact you by email if Schiit install is selected and ask you a time to send it in so we turn the unit round to you the next working day

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