Patent ID: 7520368
Filing Date: 2009-04-21
Classification: H04R

Abstract:
1. In a horn type loudspeaker for operation in a low frequency range, a cabinet comprising a rear panel, an inner panel spaced forwardly of said rear panel and having a vertically oriented throat opening therein, two inner side panels engaged with the outside edges of said inner panel, converging forwardly of said inner panel to engage at each side of a frontally arranged panel, said front panel being more narrow than said inner panel, forming a substantially trapezoidal columnar air chamber therewith, a phase inverting means of said air chamber arranged in said front panel, two outer side panels engaged with the outside edges of said rear panel, spaced from said inner side panels in oppositely disposed spaced planes to form the horizontally flaring portions of the terminal horn sections therewith, baffles cooperating with said throat opening and said rear panel to create an equal division of the air column rearward of said throat opening, forming two horizontal horn sections flaring vertically in opposite directions from said throat opening to said terminal horn sections, side channel baffles arranged to flare vertically from the terminal height of said horizontal sections in cooperation with said horizontally flaring terminal sections to the height of said air chamber partially completing said terminal horn sections, means for completing said terminal horn sections and said air chamber, and an apertured panel for enabling the sealed engagement of at least one driving unit, mounted forwardly of said throat opening and cooperating therewith, to transmit sound though said throat opening and said horn sections therebeyond.