The ZEN Air DAC also sports a couple of unique sonic tweaks from iFi. PowerMatch adjusts the gain of the ZEN Air DAC so it functions at the right level for your headphones. Gain is just a unit of measurement that indicates how loud an audio source is and is measured in decibels (dB).
XBass+ allows you to tailor the bass to suit your headphones and your personal taste. Both are designed to improve and personalise your listening experience.
**Rated for headphones up to 300 ohms - popular with Sennheiser 560/580/600/650/660, Beyer models, hifiman sundara, etc.