Abstract: A loudspeaker system employing a diaphragm type loudspeaker mounted in an opening in one of a plurality of walls of a hollow enclosure, the walls of the enclosure consisting of a plurality of layers disposed between surfaces thereof, the layers comprising a plurality of elongated strands of wood in a mass of solid resin, the axes of elongation of the strands in layers adjacent to the surfaces being generally parallel to a common plane and generally parallel to each other, the strands in adjacent layers being oriented with the axes of elongation of the strands in one layer normal to the axes of elongation of the strands in the adjacent layer. The enclosure has an axis of elongation and a transverse axis, and the strands in layers adjacent to the surfaces of the walls are generally parallel to the axis of elongation.

Abstract: A crossover network with a parallel resonant circuit in the high frequency branch is utilized to drive two loudspeakers, one in a low frequency range, and the other in the high frequency range. The resonant frequency of the resonant circuit lies in the upper end of the high frequency portion of the loudspeaker response.