Omnidirectional loudspeaker with asymmetric vertical directivity

An omnidirectional loudspeaker, comprising:

• a compression driver including
• a motor assembly disposed about a central axis;
• an annular diaphragm disposed coaxially below and operably connected to the motor assembly;
• a phasing plug mounted to the motor assembly and including a top portion facing the diaphragm and defining a compression chamber therebetween, the phasing plug including a bottom portion extending downwardly from the top portion along the central axis from a first end to a second end, the phasing plug including a plurality of apertures that extend therethrough, the bottom portion having an inner surface that defines a cavity and widens from the first end to the second end, the inner surface having a plurality of radial channels with a diagonal orientation acoustically connected to the apertures;
• and
• a housing mounted to the phasing plug along the central axis and received within the cavity, the housing having an outer surface spaced from the inner surface of the bottom portion to form a waveguide arranged to radiate sound waves downwardly and outwardly;
• and
• a horn mounted to the compression driver along the central axis to propagate the sound waves with asymmetric vertical directivity.