FIIO JT7 Gold/Black FIO-JT7-G FIO-JT7-B [Shipped from an authorized Japanese retailer, with serial number] Headphones, Open-back, Planar Magnetic

The JT7 is incredibly lightweight at just 318g, far lighter than typical planar magnetic headphones, making it comfortable for extended listening sessions and ideal for use at home or on the go. Furthermore, its foldable design allows for easy storage and portability, resulting in a remarkably compact design for an over-ear headphone.

The 95x86mm planar magnetic driver in the JT7 is entirely FIIO's proprietary design, from diaphragm development to voice coil and magnetic circuit control, ensuring meticulous control over the brand's desired sound. The large planar magnetic diaphragm delivers a vast soundstage and powerful bass. *Unlike conventional dynamic and balanced armature drivers, planar magnetic headphones are driven by electromagnetic force acting across the entire surface of a lightweight, thin diaphragm. This ensures uniform force across the diaphragm, virtually eliminating the partial vibrations common in dynamic drivers. As a result, low distortion, superior transient performance, and a vast soundstage are achieved. While this design may be more expensive due to the complex manufacturing process, it offers significant acoustic advantages.

For a planar diaphragm to exhibit its rapid vibration and delicate response characteristics to the fullest, it needs to be sufficiently thin. The JT7's diaphragm is only 3μm thick, allowing it to accurately respond to even the smallest changes in electrical signals. This results in superior transient response and clear reproduction of high-frequency signals.

The JT7's diaphragm employs a unique elastic support system, "F.E.S." (FIIO Elastic System). This driver diaphragm design incorporates a multi-dimensional texture on the surface, applying the edge processing techniques used in dynamic drivers to enhance diaphragm elasticity. F.E.S. allows for more precise control of internal stress than typical planar drivers, enabling the driver to move more freely without increasing distortion. As a result, it delivers powerful, impactful bass. *F.E.S. (FIIO Elastic System): A unique elastic support system designed to increase driver movement by adding a new deformation vector to a planar film, allowing the diaphragm to build elastic force to counteract internal stress.

The JT7 achieves high sensitivity of 92 dB/mW thanks to the powerful magnetic field generated by its high-performance bidirectional neodymium-iron-boron magnets. These magnets provide robust and sufficient driving force to the planar driver, allowing even low-output audio devices to produce a large and rich sound.