The invention provides a speaker box which comprises a shell and a
sound production monomer fixedly accommodated in the shell, and the
sound production monomer comprises a vibrating diaphragm for vibration
sound production, and the shell is made of a
metal material; the shell comprises a
front cover and a rear cover which respectively cover two opposite sides of the sound production
monomer alongthe vibration direction of the vibrating diaphragm, an annular first bracket fixed in the shell, and a sound outlet penetrating through the shell along the direction vertical to the vibration direction of the vibrating diaphragm, and the first bracket is fixed on the
front cover; the side, provided with the vibrating diaphragm, of the sound
production unit is supported and fixed to the first bracket and spaced from the
front cover, a front sound cavity is defined by the sound
production unit, the first bracket and the front cover jointly, the front sound cavity is communicated with the outsidethrough the sound outlet to form a side sound production structure, and a rear sound cavity is defined by the sound
production unit, the bracket, the front cover and the rear cover jointly. Comparedwith the prior art, the speaker box is large in
cavity size and good in acoustic performance.