| 摘要 |
<p>A loudspeaker (1) having a substantially cup-shaped frame (2); a magnetic core (3) extending inside the frame (2) and coaxial with a longitudinal axis (A) of the frame (2); a substantially truncated-cone-shaped diaphragm (4) fitted in axially sliding manner to the magnetic core (3); and a moving coil (6) fixed to the diaphragm (4) so as to be fitted in axially sliding manner to the magnetic core (3); the magnetic core (3) having two stacked permanent magnets (10), and a spacer washer (11) made of ferromagnetic material and interposed between the two permanent magnets (10); and the loudspeaker (1) being characterized in that the magnetic core (3) has a jacket (12) fitted to the stack defined by the two permanent magnets (10) and by the spacer washer (11); and in that the moving coil (6) is fitted in sliding manner directly to the jacket (12).</p> |
