A sound reproducing system including at least one portable terminal unit
which acquires data including sound data. For example, the data may be
multimedia data and is acquired from data delivery service and the like.
Each of the at least one portable terminal unit comprises: a loudspeaker
for reproducing sound from the sound data; and a sound data reproducing
portion which makes the loudspeaker reproduce the sound based on the
sound data and in cooperation with at least one sound devices. The sound
devices may be other portable terminal units. By using a plurality of
portable terminal units, it becomes possible to reproduce stereophonic
sound, surround sound, and the like. It is also possible to reproduce
image together with such sound.