Coaxial speaker

A coaxial speaker, comprising:

• a basket frame;
• a magnetic circuit system fixed to the basket frame, the magnetic circuit system having a cavity, a tweeter magnetic gap, and a woofer magnetic gap;
• a woofer vibration system, comprising a woofer diaphragm and a woofer voice coil configured to drive the woofer diaphragm to vibrate;
• and
• a tweeter vibration system, comprising a tweeter diaphragm and a tweeter voice coil inserted into the tweeter magnetic gap and configured to drive the tweeter diaphragm to vibrate;
• wherein the woofer magnetic gap comprises a first magnetic gap and a second magnetic gap;
• the woofer voice coil comprises a first voice coil and a second voice coil;
• the magnetic circuit system comprises a magnetic yoke, a main magnetic portion, a first sub-magnetic portion, and a second sub-magnetic portion that are fixed to the magnetic yoke;
• the first sub-magnetic portion is arranged around the main magnetic portion and spaced apart from the main magnetic portion to form the first magnetic gap, and the first voice coil is inserted into the first magnetic gap to surround the main magnetic portion;
• the second sub-magnetic portion is arranged around the first sub-magnetic portion and spaced apart from the first sub-magnetic portion to form the second magnetic gap, and the second voice coil is inserted into the second magnetic gap to surround the first sub-magnetic portion and the first voice coil;
• the main magnetic portion comprises a first magnet, a second magnet and a third magnet that are arranged on the same side of the first magnet along a vibration direction of the tweeter diaphragm, and a main pole core;
• the second magnet is arranged around the third magnet;
• the main pole core comprises a first plate portion and a second plate portion that are spaced apart along the vibration direction, and a wall portion connecting the first plate portion and the second plate portion;
• the wall portion is inserted between the second magnet and the third magnet and spaced apart from the second magnet to form the tweeter magnetic gap;
• the first plate portion is sandwiched between the first magnet and the second magnet, and the third magnet is sandwiched between the second plate portion and the first magnet;
• the cavity is formed throughout the magnetic yoke, the first magnet, the third magnet and the second plate portion along the vibration direction.