Abstract: A loudspeaker enclosure is disclosed which includes a horizontal bottom wall, parallel spaced vertical front and rear walls connected with the bottom wall, the front wall containing an opening for receiving a loudspeaker, and a horizontal top wall connected with the upper edges of the front and rear walls. The invention is characterized by the provision of vertical baffle walls which define a converging compression chamber behind the loudspeaker opening in the front wall, and a pair of exponential folded horns arranged laterally on opposite sides of the compression chamber. Each of the baffle walls between the compression chamber and the folded horns contains at least one opening adjacent its forward edge, each of the openings having a generally trapezoidal vertical cross-section, the vertical dimension of the front portion of the opening being greater than the vertical dimension of the rear portion of the opening.