Speaker

A speaker, comprising:

• a frame;
• a vibration system;
• and
• a magnetic circuit system;
• wherein the vibration system and the magnetic circuit system are respectively disposed on the frame;
• the vibration system comprises a sound film and a voice coil, the voice coil is configured to drive the sound film to vibrate and produce sound;
• the magnetic circuit system comprises a lower clamping plate, a first magnetic steel, and a second magnetic steel;
• the first magnetic steel is disposed on the lower clamping plate, the second magnetic steel is annular, and the second magnetic steel is disposed on the lower clamping plate and surrounds the first magnetic steel;
• the first magnetic steel and the second magnetic steel are disposed at intervals to form a first gap, the voice coil comprises a first voice coil and a second voice coil, the first voice coil is inserted into the first gap, and the second voice coil surrounds outer sides of the second magnetic steel.