[Problem] To enable high quality sound reproduction particularly in low audio frequencies in an electroacoustic transducer device.
[Solution] A driver magnet 31 is fixed in a cup-shaped yoke 29, and a diaphragm 39 opposed to the driver magnet with a space therebetween is fixed to a front end part of the yoke 29 so as to close the yoke 29. A voice coil 41 around which an insulated conductor is wound is fixed to the diaphragm 39 so as to surround a central area of the diaphragm 39. The voice coil 41 is inserted between an outer periphery of the driver magnet 31 and an inner wall of the yoke 29. Leads 41a at both ends of the voice coil 41 are derived from diagonal positions. An outer peripheral area 39b of the diaphragm 39 from around the voice coil 41 faces a sealed space E formed in a region inside the yoke 29 on the outer periphery of the driver magnet 31.