Loudspeaker

A loudspeaker, comprising:

• a magnetic circuit system including a first magnetic part, a second magnetic part surrounding the first magnetic part, and a magnetic gap formed by the first and second magnetic parts, at least one of the first and second magnetic parts being a magnet, the first magnetic part including a body and an avoiding part formed surrounding an edge of the body;
• a vibration system driven by the magnetic circuit system, and including a dome and a membrane facing the magnetic circuit system, the membrane including a center hole;
• a dome fixedly attached to one side of the membrane away from the magnetic circuit system and covering the center hole;
• wherein
• the avoiding part includes an upper surface facing to the membrane and a lower surface opposite to the upper surface;
• the avoiding part is formed by depressing from the upper surface to the lower surface;
• the center hole is enclosed by a contour line of the membrane;
• an orthographic projection of the contour line on the first magnetic part is located within the area of the avoiding part.