If you are searching for a way to make the music from your smartphone/DAP sound better, or if you need to drive some less efficient headphones, iFi Audio submits the xDSD portable DAC/Amp for your consideration. It looks to be an impressive little beast that is barely bigger than a deck of cards.
HiFiMAN was founded in 2007 by Dr. Fang Bian, a man with a passion for portable audio. His love for music and sound quality is immediately present in his HiFiMAN products. HiFiMAN has been known for producing some very well regarded planar magnetic headphones, like the HE-6, but up until now, those reference headphones required a lot of power.