Speaker

A speaker comprising:

• a base frame;
• a vibration system fixed to the base frame;
• and
• a magnetic circuit system configured to drive the vibration system to vibrate and generate sound, comprising:
• a lower clamping plate fixed to the base frame;
• a center magnetic circuit fixed to the lower clamping plate;
• and
• a side magnetic circuit provided around the center magnetic circuit and spaced apart from the center magnetic circuit to form a magnetic gap;
• wherein the side magnetic circuit comprises two symmetrically spaced first side magnetic units;
• each of the first side magnetic units comprises a first side magnet fixed to the lower clamping plate, a first side pole core provided on a side of the first side magnet away from the lower clamping plate, and a second side magnet provided on a side of the first side pole core away from the first side magnet;
• the first side magnet and/or the second side magnet comprise a first main body and a first projection extending from the first main body along a direction away from the center magnetic circuit, and a first grooving is formed by the first main body and the first projection.