A loudspeaker system including at least one enclosure incorporating a wave guide having a curved input slot through which sound waves generated from an acoustic transducer are introduced by way of an acoustic chamber and wherein the curvature of the slot and the orientation of opposite side walls of the enclosure are such that sound ways propagated within the wave guide exit the wave guide in a geometric configuration of a segment of a torus and so that sound waves from side-by-side enclosures form a common non-interfering wavefront.