Patent ID: 8280091

Claim:
A dual phasing plug assembly for a compression driver, the dual phasing plug assembly comprising: a first phasing plug including: a first base portion including a first input side, a first output side, a central bore coaxial with a central axis and extending from the first input side to the first output side, a plurality of first entrances on the first input side, a plurality of first exits communicating with the central bore on the first output side, and a plurality of first channels fluidly interconnecting the first entrances with the respective first exits, where each corresponding first entrance, first channel and first exit establish a first acoustical path that is non-radial relative to the central axis; and a second phasing plug including: a second base portion including a second input side, a second output side facing the first output side, a plurality of second entrances on the second input side, a plurality of second exits on the second output side, and a plurality of second channels fluidly interconnecting the second entrances with the respective second exits, where each corresponding second entrance, second channel and second exit establish a second acoustical path that is non-radial relative to the central axis; and a hub portion extending along the central axis from the second output side through the central bore, the hub portion including an outside surface having a diameter coaxial with the central axis, where the first exits and the second exits communicate with an annular region between the central bore and the outside surface.