Speaker box

A speaker box, comprising:

• a housing defining a receiving space;
• and
• a speaker driver received in the receiving space, wherein the speaker driver includes a basin frame, and a diaphragm and a magnetic circuit system that are supported on the basin frame, wherein the diaphragm and the housing cooperatively define a rear cavity, and the magnetic circuit system includes a magnetic bowl and a magnetic steel component fixed on the magnetic bowl, wherein
• the speaker driver further includes a metal cover case fixed on the basin frame and the magnetic bowl, the metal cover case divides the rear cavity into a first rear cavity located inside the speaker driver and a second rear cavity located outside the speaker driver, and the second rear cavity is filled with sound-absorbing particles;
• the metal cover case includes a bottom wall connected with the magnetic bowl and a side wall bent and extended from the bottom wall, and the side wall of the metal cover case defines leakage holes recessed from an edge of the side wall far away from the bottom wall, and wherein each leakage hole communicatively couples the first rear cavity with the second rear cavity;
• and
• the speaker box further includes a metal ring covered on the magnetic bowl and the metal cover case, and the magnetic bowl, the metal cover case, and the metal ring are glued and fixed to one another.