Separating the motor unit from the speaker unit increases actual back volume while preventing acoustic interference between components.
Radial reinforcing ribs on the diaphragm edge portion increase structural rigidity and suppress inverse resonance between the dome and edge.
A hard dome tweeter uses a T-shaped yoke iron to lower treble resonance frequency and expand bandwidth.
A low-profile hemispherical baffle with an apex orifice transforms directional loudspeaker output into uniform spherical waves.
An air-permeable isolating piece covers a second through hole in a dome to form a leakage groove, preventing liquid ingress while maintaining pressure balance.
A shared yoke magnetic circuit drives dual vibration portions to produce sound in opposite directions, reducing volume and weight compared to separate units.