TechPowerUp published Quick Look: Questyle M15 Portable DAC/Amplifier
A quote from the article:
Questyle puts its patented current mode amplification to good use not only in the desktop space but also the mobile market. Today we examine the Questyle M15 that offers one of the very best portable DAC/amp listening experiences with sensitive IEMs as well as power-hungry headphones too.Quick Look: Questyle M15 Portable DAC/Amplifier