In physics, a point source is an energy source with negligible dimensions – a tiny, singular point in space where the energy emanates. In physics terms, a true point source speaker would be infinitely small with the ability to produce frequencies from 20Hz to 20kHz.
Most speakers approximate this performance by using single drivers or coax drivers or in most cases 2 or 3-way drivers clustered together as close as physically possible.

A point source speakers sound expands away from the speaker as an ever- enlarging sphere. Unlike the line array system or an omni a point source speaker radiates sound in a spherical pattern.