A sound-wave path-length correcting structure for a speaker system
includes a sound source and a horn. The horn has a sound-wave path-length
correcting throat portion. The sound-wave path-length correcting throat
portion corrects a sound-wave path-length of a sound wave input from an
inlet opening thereof in the sound path, and emits the sound wave from an
outlet opening thereof. The sound path is defined by a first side surface
with a concave curved surface and a second side surface with a convex
curved surface that face each other with a space, and a third side
surface and a fourth side surface that face each other with a space. The
third side surface and the fourth side surface are formed so that their
surfaces gradually widen as the surfaces advance from the inlet opening
to the outlet opening of the sound-wave path-length correcting throat
portion.