First Listen: iFi Micro iDSD portable headphone amp/DAC/preamp - Hi-Fi+
iFi iDSD Black Label: Swiss Army knife utility, top tier sound and flexibility that does everything extremely well, so much value it's just unfair to the competition – Audio Primate
iFi-audio Nano Series – iDSD DAC Review: Part III
Tyson's Review - iFi iDSD Black vs Silver
Trans/portable high-end audio: iFi's micro iDSD Black Label | Darko.Audio