Abstract: An improvement in small round loudspeakers of popular standard types used in vehicle assembly is obtained by modifying a standard-sized basket in a manner to provide a polar array of special mounting openings located on a concentric mounting circle of larger than standard diameter, thus allowing the use of a larger cone for improved performance and allowing the loudspeaker to be mounted in different-sized popular mounting hole patterns in the baffle panel; for example an aspect of the invention enables the "6.5 inch basket", associated with Asian-built vehicles, to be fitted with a larger-sized cone used in the "170 mm basket" associated with European-built vehicles, thus providing a loudspeaker, with the improved performance of the larger cone, that can be installed in a range of different baffle panel cutout sizes and configurations of either type of vehicle.