An audio driver assembly, comprising: a driver housing; and an audio driver secured within the driver housing and comprising: a magnet assembly, the magnet assembly comprising: a permanent magnet; a voice coil circumscribing the permanent magnet; and a yoke cup at least partially surrounding the permanent magnet and the voice coil, the yoke cup comprising: an upper portion located on an upper surface of the permanent magnet and at least partially extending over peripheral sidewalls of the permanent magnet and the voice coil; and a lower portion forming a cavity between the upper portion and the lower portion, the voice coil located at least partially within the cavity; a flexible diaphragm overlying the magnet assembly; and a spacer comprising lateral projections located between the magnet assembly and the flexible diaphragm and longitudinal projections extending perpendicular to the flexible diaphragm, wherein an upper surface of the upper portion of the yoke cup is interposed between the spacer and the permanent magnet of the magnet assembly, and wherein the lateral projections comprise elevated portions and recessed portions, only the elevated portions being in direct physical contact with the upper surface of the magnet assembly and the lower surface of the flexible diaphragm. a driver housing; and an audio driver secured within the driver housing and comprising: a magnet assembly, the magnet assembly comprising: a permanent magnet; a voice coil circumscribing the permanent magnet; and a yoke cup at least partially surrounding the permanent magnet and the voice coil, the yoke cup comprising: an upper portion located on an upper surface of the permanent magnet and at least partially extending over peripheral sidewalls of the permanent magnet and the voice coil; and a lower portion forming a cavity between the upper portion and the lower portion, the voice coil located at least partially within the cavity; a flexible diaphragm overlying the magnet assembly; and a spacer comprising lateral projections located between the magnet assembly and the flexible diaphragm and longitudinal projections extending perpendicular to the flexible diaphragm, wherein an upper surface of the upper portion of the yoke cup is interposed between the spacer and the permanent magnet of the magnet assembly, and wherein the lateral projections comprise elevated portions and recessed portions, only the elevated portions being in direct physical contact with the upper surface of the magnet assembly and the lower surface of the flexible diaphragm. a permanent magnet; a voice coil circumscribing the permanent magnet; and a yoke cup at least partially surrounding the permanent magnet and the voice coil, the yoke cup comprising: an upper portion located on an upper surface of the permanent magnet and at least partially extending over peripheral sidewalls of the permanent magnet and the voice coil; and a lower portion forming a cavity between the upper portion and the lower portion, the voice coil located at least partially within the cavity; a flexible diaphragm overlying the magnet assembly; and a spacer comprising lateral projections located between the magnet assembly and the flexible diaphragm and longitudinal projections extending perpendicular to the flexible diaphragm, wherein an upper surface of the upper portion of the yoke cup is interposed between the spacer and the permanent magnet of the magnet assembly, and wherein the lateral projections comprise elevated portions and recessed portions, only the elevated portions being in direct physical contact with the upper surface of the magnet assembly and the lower surface of the flexible diaphragm. an upper portion located on an upper surface of the permanent magnet and at least partially extending over peripheral sidewalls of the permanent magnet and the voice coil; and a lower portion forming a cavity between the upper portion and the lower portion, the voice coil located at least partially within the cavity; a flexible diaphragm overlying the magnet assembly; and a spacer comprising lateral projections located between the magnet assembly and the flexible diaphragm and longitudinal projections extending perpendicular to the flexible diaphragm, wherein an upper surface of the upper portion of the yoke cup is interposed between the spacer and the permanent magnet of the magnet assembly, and wherein the lateral projections comprise elevated portions and recessed portions, only the elevated portions being in direct physical contact with the upper surface of the magnet assembly and the lower surface of the flexible diaphragm.