FiiO KA13 Dual CS43131 Portable DAC Amplifier with 550mW Output Power FiiO KA13 Review After nearly two years under fine polishing by FiiO engineers, the KA3 portable DAC-AMP has been upgraded to the KA13 as a mini desktop-class DAC and headphone amplifier. It combines new design language, new technology, and robust performance, configurations, and experience in one. FiiO focuses on creating a more omnipotent and comprehensive USB dongle that can provide users with a full range of high-quality experiences. USB … Continue reading FiiO KA13