I reviewed this elegantly English D/A headphone amplifier in October 2014, with a Follow-Up in November 2015 (footnote 1). I was impressed with what I heard. Yes, at $2000, the Prime is relatively expensive—but, as I wrote, "I liked the palpable way it had with imaging and its clean, clear, but smooth highs."
Another aspect of the Prime that I liked was the fact that, with a firmware upgrade, it could decode and play MQA-encoded files. When this upgrade became available in spring 2016, I downloaded the firmware…