Audiophilepure

https://audiophilestyle.com/ca/reviews/review-schiit%E2%80%99s-latest-yggdrasil-incarnation-r956/

Since the Schiit Yggdrasil was first introduced, Jason Stoddard and Mike Moffat have worked tirelessly to improve the performance of this reasonably priced high-performance DAC. With constant filter, power supply and analog-stage improvements, the Yggdrasil has kept it’s place as the go-to DAC for those who demand first rate digital to analog conversion without having to pay a king’s ransom for the opportunity.

The only Way to tell whether you have the latest Yggdrasil in by the Serial Number. The latest analog section units are so designated by a SN that starts with the letter “B”. The presence of the latest USB upgrade is indicated by the above sticker over the USB input port.