Micro iDSD Black Label as reviewed by miceblue425 on YouTube.

“There are internal upgrades from the original iDSD that have been put into the Black version….The iDSD Black Label also has upgraded capacitors and the analogue side helps with the bass reproduction…definitely recommends it to people to try out if you can as it is one of the best sounding DAC in its price range…Two thumbs up for this device!”
https://www.youtube.com/watch?v=3dAPyI4JLnI

Thank you miceblue425 for your thorough review.