Speaker box

A speaker box comprising:

• a housing having a receiving space;
• and
• a speaker received in the receiving space, comprising:
• a frame;
• a vibration system fixed to the frame, comprising:
• a diaphragm fixed to the frame;
• and
• a coil fixed to the diaphragm and inserted into the magnetic gap;
• a magnet system having a magnetic gap and configured to drive the vibration system to vibrate, comprising:
• a main yoke spaced apart from the frame;
• a main magnet mounted on a side of the main yoke facing the coil;
• and
• an elastic support member configured to connect the main yoke with the frame, comprising:
• a bottom wall surrounding the main yoke;
• and
• a side wall bended and extended from an edge of the bottom wall;
• a metal mesh cover surrounding the elastic support member and fixedly connected to the frame;
• wherein
• the side wall is fixed to the metal mesh cover;
• an inner chamber is enclosed by the frame, the main yoke, the elastic support member and the diaphragm;
• a back chamber is enclosed by the main yoke, the elastic support member, the metal mesh cover and the housing;
• the back chamber is isolated from the inner chamber;
• a plurality of air vents provided on the metal mesh cover is configured to connect the back chamber with the inner chamber.