5. What is its sound tuning style of FiiO FDX?

The dynamic driver diaphragm of the FDX uses top-tier material- pure beryllium, which is lightweight yet with great rigidity. Pure beryllium is currently the perfect material for making traditional dynamic drivers, which can help to achieve lower distortion, high transient response and greatly controlled sound performance. In terms of structure design, 3 acoustic technologies have been applied, including front acoustic prism, anti-standing waves rear volcanic field system and semi-open acoustic design. The overall sound performance is balanced and clean with accurate detail reproduction and high resolution. The extended, transparent and soft treble and explosive, flexible, and high-density bass are totally capable of handling varieties of music styles.