A speaker includes a housing and a sound unit accommodated in the housing. A sound outlet is disposed on one side wall of the housing, a front cavity is formed between the sound unit and the housing, a front cavity channel and a side cavity on one side of the front cavity channel are disposed in the housing, and the front cavity channel is connected between the front cavity and the sound outlet. The speaker further includes a connecting channel formed by injection molding, and the connecting channel is connected between the side cavity and the front cavity channel. The connecting channel includes a bottom wall, a side wall which extends from the bottom wall, and a top wall connected to the side wall.