Arrayable loudspeaker with constant wide beamwidth

An arrayable loudspeaker comprising:

• a cabinet having top, bottom and side walls forming an enclosure and further having a front with a front opening and a center axis passing through said front opening,
• a horn mounting structure disposed on said center axis of said enclosure behind the front opening thereof,
• a horn for a high frequency transducer, said horn having a front perimeter portion defining a mouth end, a throat end, flared sidewalls extending from said throat end to said mouth end, and a top wall and a bottom wall extending between said sidewalls, and further having an axis extending from the throat end of the horn through the horn's mouth end which defines a propagation axis for sound produced by a high frequency transducer mounted to the throat end of the horn, the front perimeter portion of the horn including side perimeter edges, a top perimeter edge and a bottom perimeter edge,
• said horn being mounted to the horn mounting structure in said enclosure such that the horn's propagation axis substantially aligns with the center axis of said enclosure, and such that the mouth end of the horn is positioned at the front opening of said enclosure, the mouth end of said horn being smaller than the front opening of said enclosure such that side chamber openings are created at the front opening of the enclosure adjacent the mouth end of the horn, and such that top and bottom gaps are created at the front of the enclosure above and below the top and bottom perimeter edges of the horn's front perimeter portion,
• low frequency transducer mounting structures positioned in said enclosure behind the front opening thereof on opposite sides of said horn mounting structure, and
• at least one forward facing low frequency transducer mounted to each of said low frequency transducer mounting structures such that the low frequency transducers are positioned in said enclosure on opposite sides of said horn at a predetermined forward facing angle of between about 27 degrees and about 39 degrees relative to the propagation axis of the horn, wherein each forward facing low frequency transducer faces a flared sidewall of the horn and one of said side chamber openings at the front of the cabinet,
• wherein low frequency side chambers containing a volume of air are formed between the forward facing low frequency transducers and the flared sidewalls of the horn, said low frequency side chambers being coupled to atmosphere through the side chamber openings at the front opening of the enclosure adjacent the mouth end of the horn, and
• wherein low frequency exit channels are formed above the top wall of the horn and below the bottom wall of the horn, said low frequency exit channels having the following characteristics:
• they have a volume for containing a volume of air,
• the air volume thereof comprises between about 20% to about 30% of the combined air volume of the low frequency side chambers and low frequency exit channels,
• they extend from about the horn's support structure to the gaps at the front of the enclosure above and below the top and bottom perimeter edges of the horn's front perimeter portion,
• they couple to said low frequency transducer side chambers, and
• they couple to atmosphere through the top and bottom gaps above and below the top and bottom perimeter edges of the horn's front perimeter portion.