Speaker box

A speaker box, comprising:

• a shell having a receiving space;
• a support wall, which is formed by extending the inner side of the shell;
• a speaker, which is accommodated in the receiving space of the shell and fixed on the support wall, wherein the speaker comprises a diaphragm for producing sound via vibrating, which partitions the receiving space into a front sound cavity and a rear cavity;
• a sound guiding channel, which is formed in the receiving space and communicates the front sound cavity with the outside and cooperatively defines an front cavity with the front sound cavity;
• a surrounding wall, which is formed by extending from one inner side of the shell and is located outside the support wall;
• a cover plate, which covers the surrounding wall, and the shell, the surrounding wall, the support wall and the cover plate are cooperatively enclosed as an auxiliary acoustic cavity;
• wherein the support wall comprises a through-hole, and the auxiliary acoustic cavity communicates with the front cavity through the through-hole to form a resonant cavity structure of the front cavity;
• a leakage structure for balancing the auxiliary acoustic cavity with external sound pressure, which includes a leakage hole penetrating therethrough the shell and a damping mesh covering the leakage hole.