Display device built-in passive sound box

The invention discloses a display device built-in passive sound box and a displayer, and relates to a sound box device. The display device built-in passive sound box can reduce the volume of the sound box and improve low-frequency effect. A miniature enclosed loudspeaker is characterized by comprising a sound box, a loudspeaker single unit, a first passive radiation part and a second passive radiation part, wherein the loudspeaker single unit is arranged in the sound box, and a diaphragm of the loudspeaker single unit is positioned on a first surface of the sound box; the first passive radiation part is arranged on the first surface; the second passive radiation part is arranged on the second surface of the sound box; the second surface is opposite to the first surface; and the first passive radiation part and the second passive radiation part can buffer sound pressure generated by loudspeaker parts in the sound box. The invention discloses the displayer provided with the built-in passive sound box. The display device built-in passive sound box and the displayer are suitable for the field of sound box manufacture.