Passive radiator and sound box

The utility model discloses a passive radiator and a sound box, the passive radiator comprises a housing, a light source, a reflective ring and a light guide ring, the housing is provided with a light outlet, and the housing is internally provided with a mounting seat; the light source is mounted on the mounting base; the reflective ring is mounted on the mounting seat; the two ends of the light guide ring are a light-in end and a light-out end respectively, the light-out end is located on the inner side of the light reflecting ring, the light-in end extends in the direction close to the light source, and a light splitting sawtooth ring is formed at the light-in end. The light guide ring and the light splitting sawtooth ring located at the light inlet end of the light guide ring are used for processing the emergent light of the light source, so that the light is softer and uniform in color mixing, the energy loss of the emergent light in the transmission process is reduced, and the energy utilization rate is