Apparatus for reproduction of stereo sound from a two channel signal, having one or more first transducers (3a, 3b) for reproducing a signal comprising one of or the sum of the two channels, and one or more second transducers (5) for reproducing a signal comprising the difference between the two channels. The apparatus is arranged such that the signal generated by the one or more first transducers (3a, 3b) is transmitted from an output plane in a direction substantially orthogonal to the output plane. The apparatus also has a duct (6) associated with the one or more second transducers (5) and is arranged to conduct the signal generated by the one or more second transducers (5) such that it is transmitted along a direction substantially parallel to the output plane from a point spaced from the plane in the direction in which the signal generated by the one or more first transducers (3a, 3b) is transmitted.