a voice coil adaptor ring and loudspeaker system of the moving coil type including a cone diaphragm supported by a frame , a voice coil former for supporting a voice coil , and a lower suspension for securing and centering the voice coil former in a magnetic gap while it is displaced by a magnetic circuit . the voice coil adaptor ring is mounted over the voice coil former and comprises a substantially cylindrical sleeve having a ledge extending outward from said sleeve for supporting the cone and lower suspension ; an inner glue flange projecting inward from the sleeve so as to define a diameter corresponding to an outer diameter of the voice coil former whereby the sleeve , inner glue flange and voice coil former define a gap for receiving epoxies ; and a plurality of venting passages in fluid communication with a cap volume defined by the cone and dust cap for venting hot air from the cap volume .