Speaker device and speaker unit

g A simple structure will achieve dissipation of heat from the area inside a voice-coil bobbin and a diaphragm without a reduction in sound quality, in which a process for assembling a speaker device with high accuracy is performed in a simple operation. A speaker device comprises a recess-shaped frame which supports, through an edge , a vibration system member provided with a diaphragm coupled to a voice-coil bobbin , and a magnetic circuit which comprises an approximately ring-shaped magnet and an approximately ring-shaped plate which are mounted on a yoke disposed in the frame , and a magnet gap in which a voice coil wound on a voice-coil bobbin is disposed. In the magnetic circuit a through hole extending in the vibration direction of the diaphragm is fitted over a center boss of a shape protruding from the bottom of the frame in the direction of the sound emission, so that the magnetic circuit is positioned and fixed with respect to the frame . An air passage is formed along the center boss fitted into the through hole of the magnetic circuit to establish communication between the inside of the voice-coil bobbin and the outside of the frame.