An exemplary speaker assembly includes a housing, a loudspeaker, a sound-guiding channel and a cushion with a plurality of meshes. The housing has a receiving chamber and an acoustic chamber. The loudspeaker is accommodated in the receiving chamber. The sound-guiding channel is formed in the acoustic chamber. The sound-guiding channel has a first end with a first opening to communicate the sound-guiding channel and a second end with a second opening to communicate the sound-guiding channel with surrounding environment. The cushion is formed at the first opening of the sound-guiding channel for slowing down air flowed from the rear side of the loudspeaker to the sound-guiding channel.