FT1 is FIIO's 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 Feiao's 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.