Phase plug for compression drivers

A phase plug assembly for a compression driver with an electrodynamic motor structure, comprising:

• a. a compression chamber formed by an oscillating diaphragm and a boundary face of a phase plug adjacent to the diaphragm;
• b. a singular acoustic exit defined by a termination of the phase plug;
• c. an inner acoustic channel and an outer acoustic channel each traversing through the phase plug from the compression chamber to terminate at the acoustic exit;
• and
• d. an axis of rotation, defined within an interior of the phase plug assembly, which extends from the boundary face of the phase plug at the compression chamber to the acoustic exit;
• e. wherein the phase plug is arranged symmetrically around the axis of rotation;
• f. wherein the phase plug comprises a single-part body;
• g. wherein the inner and outer acoustic channels traverse between respective entrances at the boundary face of the phase plug assembly and respective terminations at the acoustic exit;
• and
• h. wherein the inner and outer acoustic channels are both delimited in the single-part body within an outer perimeter of the phase plug;
• i. wherein the outer acoustic channel is formed by an outer surface of the single-part body and by an outer surface of the electrodynamic motor structure;
• and j. wherein the single-part body is formed by molding and without undercuts.