Patent ID: 7506721

Claim:
In a horn loudspeaker for the low frequency range; an enclosure comprising: a plurality of vertical baffles arranged in sealed relation to form a substantially parabolic wall, arranged with the center thereof being most rearward, and the ends thereof being most forward, defining the outside boundary of an expanding column of air, a second plurality of baffles, spaced forward from said rearward wall, at least one of said baffles being adapted with at least one aperture, and including vertical baffles arranged to parallel the axis at the focus of said parabolic wall, defining a primary section of expanding air column which expands predominately vertically from said each aperture and exits rearward along the central horizontal axis of said rearward wall, and further including baffles which define the inner boundaries of said expanding column, at least one sound source, means for turning said primary air column at the junction of said exit and said rearward wall into said expanding column boundaries, and means for completing an air chamber for said sound source and thereby completing said expanding column.