Speaker box

A speaker box, comprising:

• an upper shell;
• a lower shell defining a receiving space with the upper shell;
• a speaker unit received in the receiving space;
• a partition wall;
• and
• a cover plate,
• wherein the speaker unit divides the receiving space into a front cavity and a rear cavity, and comprises a diaphragm configured to vibrate and emit sound, the diaphragm is spaced apart from the upper shell to define a front acoustic cavity, the upper shell is provided with a sound transmitting channel communicating the front acoustic cavity with outside, the front acoustic cavity and the sound transmitting channel together form the front cavity of the speaker box,
• wherein the upper shell comprises a top wall facing right the diaphragm, a side wall extending from the top wall towards the lower shell and fixed to the lower shell, and a support wall extending from the top wall towards the lower shell to the rear cavity and fixing the speaker unit, the top wall, the side wall, and the lower shell define the receiving space, the support wall surrounds an outer circumference of the speaker unit, the partition wall extends from the top wall towards the lower shell to the rear cavity, and the cover plate extends from the partition wall towards the support wall, the partition wall, the cover plate, and the support wall are received in the receiving space, the cover plate is received in the receiving space and is spaced from the speaker unit;
• the partition wall, the cover plate, and the support wall defines at least two resonant cavities spaced apart from each other, the at least two resonant cavities are in communication with the front cavity.