Now the Pro iDSD is their most ambitious product for a reason. The very first hint of it occurred as early as January 2014. The prototype showcased during CES then was still a far cry from today’s production. Digital gets obsolete rather fast, thus the Pro iDSD presumably involved more than one return to the drawing board along the road to the final feature set and a major revamp or two probably followed accordingly. It’s possible too that more than once this ambitious project landed on the back burner to make room for products like the nano iGalvanic3.0 (another time-consuming affair) or the Pro iCAN. Hence iFi’s flagship DAC not only underwent significant changes over time, it also leverages proprietary tech which this company released separately to already have field-tested. The outcome is nothing shy of a monster whose combination of things seems uniquely capable.
Read the full review at http://www.6moons.com/audioreviews2/ifi/1.html