PURPOSE: To convert a low frequency signal of a large amplitude by reducing a distortion, by providing a cylindrical bobbin, a coil wound to the cylindrical bobbin, a ring magnet, a shaft fixed to the axial center of the ring magnet, respective separate guide piece which is guided so as to be slidable in both sides of the shaft and fixed to both sides of the cylindrical bobbin, a frame fixed to the cylindrical bobbin, and a diaphragm whose peripheral edge part and center part are fixed to the frame and the tip part of the shaft, respectively.

CONSTITUTION: The titled transducer is provided with a cylindrical bobbin 2, a coil 1 wound to this cylindrical bobbin 2, a ring magnet 5, a shaft 6 fixed to the axial center of this ring magnet 5, respective separate guide piece 3, 4 which is guided so as to be slidable in both sides of this shaft 6 and fixed to both sides of the cylindrical bobbin 2, a frame 8 fixed to the cylindrical bobbin 2, and a diaphragm 7 whose peripheral edge part and center part are fixed to this frame 8 and the tip part of the shaft 5, respectively. In this way, even if the low frequency signal of a large amplitude is inputted, a magnetic distortion is scarcely generated at the time of conversion of electricity → a machine, and also, the diaphragm is stable as to positioning in its center part, therefore, a distortion is scarcely generated at the time of conversion of the machine → a sound.