Wide range speaker system Patent #: 3931867
ApplicationNo. 06/014908 filed on 02/26/1979
US Classes:381/342, Plural horns or diaphragms181/144, PLURAL DIAPHRAGM SOUND SOURCES181/146, With sound-asborbing means381/346, Acoustic resistance381/395Mechanical detail
ExaminersPrimary: Cook, Daryl W.
International ClassesH04R 1/28 (20060101)
H04R 1/22 (20060101)
H04R 1/26 (20060101)
AbstractA loud speaker and enclosure system that has improved acoustical properties, comprises a cubical frame composed of two sidewalls, a top and a bottom, having an open front and back. The frame is made of substantially rigid material. The backwall is closed by means of a panel of styro-foam. An acoustical horn in the form of a truncated square pyramid is molded from foamed plastic and is of such size as to be fitted into the inner space of the frame with the wide end of the pyramid at the front end of the frame. Means are provided at the corners of the pyramid, for attachment to the frame. Along the walls of the horn there is a space between the walls of the horn and the walls of the frame, of selected dimension. At the small end of the horn is a transverse wall, which has a circular opening. A low frequency, large diameter, cone type speaker is fastened to this wall, mounted inside of the horn, with the cone facing toward the back of the frame. A structure, is mounted to the loud speaker and supports one or more higher frequency, smaller speakers, which are faced toward the front of the frame.