Review: iFi micro iDSD Signature – The Audio Beatnik
iFi Audio micro iDSD BL DAC and headphone amp
iFi Micro iDSD Black Label DAC/Headphone Amp - YouTube
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
micro iDSD Black Label by iFi audio - USB DAC and Headphone Amp for Home and Portable