Patent ID: 7513332

Claim:
In a horn type loudspeaker for operation in a low frequency range, a cabinet comprised of a plurality of panels in sealed engagement, being substantially vertical in proportion, arranged in a vertically and horizontally symmetrical layout, wherein equal division along the horizontal plane would result in two essentially equal cabinets, said cabinet further comprising: a back chamber assembly, a throat assembly, and terminal channel assembly, said back chamber assembly comprising an enclosed volume of air of a substantially rectangular shape, centrally and axially located, housing at least one driver, with at least one rear-facing throat opening located axially therein, the forward-most panel being removable, said throat assembly comprising a vertically bifurcated horizontal channel, each channel side being directed oppositely from said at least one throat opening, and including vertically arranged baffles forming the flaring portions therein, said channels comprising the throat section, said throat section being partially completed by a rearwardly-located panel, arranged perpendicular to the horizontal central axis, said terminal channel assembly comprising two vertically-proportioned exit channels, said exit channel terminus mouth size appropriate for its planned position, said exit channels comprising a single fold in the horizontal plane, and exhausting equally from both sides of said back chamber, whereby the sides of said back chamber further complete said exit channels, said throat section and said exit channel section comprised of at least two different flare rates, the terminal section being the longest of the two, and having the lower flare rate, the first section being the shortest in length and having the higher flare rate, full-channel hard-surface reflectors at the juncture of said throat and said terminal sections, said terminal section reflectors each comprising an outside channel wall portion, to control the direction of waveforms to and from said sections, a top panel, and a bottom panel, completing said back chamber assembly, said throat assembly and said terminal exit channels.