The FiiO JT1 utilises a 50mm dynamic driver meticulously crafted with a PEK+PU+aluminium polymer diaphragm, selected after a thorough assessment of various materials. The driver’s lightweight construction facilitates rapid movement, enabling the accurate reproduction of intricate details. Additionally, the inclusion of a brass gasket provides support, contributing to low distortion and an extended frequency response. This thoughtful combination of materials and design elements enhances the overall performance of the driver, ensuring a high-quality audio experience with detailed and distortion-free sound reproduction.