@infection - I have not owned the Gungnir, but I did own the Bifrost
My issue with both of these DAC's is - they share the same USB port circuitry - which is powered from the USB power from the computer and as such - both will suffer from the problems associated with computer USB power - instability and noise!
To combat this issue I purchased a V-link192 USB to SPDIF converter, which improved things greatly.
In addition to that I also purchased a dual lead USB cable from Doukmall and a separate power supply
See this link for further details
https://forum.audiogon.com/discussions/newish-product/post?postid=1436377
I have since changed to the Bluesound Node 2 - which completely outperformed the Bifrost/Vlink combo and is easier to maintain.
Regards - Steve...
My issue with both of these DAC's is - they share the same USB port circuitry - which is powered from the USB power from the computer and as such - both will suffer from the problems associated with computer USB power - instability and noise!
To combat this issue I purchased a V-link192 USB to SPDIF converter, which improved things greatly.
In addition to that I also purchased a dual lead USB cable from Doukmall and a separate power supply
See this link for further details
https://forum.audiogon.com/discussions/newish-product/post?postid=1436377
I have since changed to the Bluesound Node 2 - which completely outperformed the Bifrost/Vlink combo and is easier to maintain.
Regards - Steve...