Before the launch of the new model, I’d like to take a moment to revisit the rear housing, including its wooden components.
In dynamic driver earphones, the housing is divided into two parts: the front and the rear, with the dynamic driver at the boundary.
The interior of the rear housing plays a role similar to a spring, moving the diaphragm by the air inside the housing, and by compressing and rebounding the air inside the rear housing due to the movement of the diaphragm, it affects the degree of movement of the diaphragm.
I often liken the rear housing to instruments like drums or percussion. The diaphragm is like the drum head, and the drum shell (body) is like the side walls of the rear housing, while the bottom is akin to the backplate.
Please keep this in mind for now.