The speaker comprises a magnetic circuit. The speaker comprises mobile equipment that is movable relative to the magnetic circuit. The spool holder is mounted movably through air gaps and a guide element of the mobile equipment is arranged between the mobile equipment and a frame, on the side of a membrane relative to the magnetic circuit.
The mobile equipment passes all the way through the magnetic circuit through end air gaps. The speaker includes a complementary guide element, arranged between the mobile equipment and the frame, on the side opposite the membrane relative to the magnetic circuit.