I am a member of the ifi iClub and a couple of months ago ifi Audio offered some of there newly released products for review. I already own the ifi micro iDSD so I decided to see if the new iPurifier2 could further enhance the sound of the iDSD.  I also asked ifi to supply a Mercury USB cable. The items where shipped very quickly by Select Audio.   Equipment used for testing:   ifi micro iDSD ifi micro iDAC 2 Mercury USB cable Beyerdynamic T1 Headphone Beyerdynamic A20 headphone amp Sennheiser IE80 Headphone Geek Out IEM 100 Dac/headphone amp...