Abstract: A portable loudspeaker system that includes loudspeaker means for reproducing relatively high audio frequencies, and amplifier means, and further includes a carrying case formed as a relatively rigid, low-density, releasably matable pair of polystyrene shells that define an enclosed interior space when mated. Mounted in an opening through a wall of one of the shells is a woofer for reproducing only relatively low audio frequencies as acoustic waves radiating away from said case. Disposed within the case is a body of sound absorbing polyurethane foam that has a plurality of relatively large voids for respectively storing the loudspeaker means, the amplifier means and an optional sound source such as a compact disc player.