FT1 is FIIOs first closed-back wooden earphone crafted with premium North American black walnut for its ear cups offering an exquisite appearance and fine texture. Each grain pattern is unique to ensure a personalized touch. Acoustically FT1 features Feiaos second-generation 60mm large dynamic driver unit delivering a lower resonance frequency for rich powerful sound. The diaphragm is made of nano wood fiber composite providing excellent high-frequency extension and transient response ensuring the sweet smooth and densely detailed mid-frequency vocal performance typical of paper diaphragms。