high quality single or multiple channel sound dispersal is obtained through the arrangement of a plurality of similar speakers divergently mounted in an airtight frame with integral horns formed therein such that the central axis of each speaker is coaxial with a line normal to and projected from the center of each face of a polyhedron characterized by the tetrahedron , the hexahedron , the octahedron , the dodecahedron and the icosahedron . when the speakers thus arranged are excited in phase , a series of infinite acoustic baffles are created between adjacent speakers creating a series of exponential horns which disperse the sound energy as if from a point source to the walls , ceiling and floor of the listening room and then by reflection to the listener . the frame / horn component is manufactured of universal parts .