Coaxial loudspeakers are designs where several separate loudspeakers, called transducers, are combined into a single unit. At the core is a larger mid-bass driver that takes care of midrange and bass reproduction. Directly in the middle, on the same axis, is a smaller tweeter for the high frequencies. Thanks to this arrangement, one such speaker can cover a wide sound spectrum. They are sometimes referred to as "dual-band" if they contain a mid-bass and tweeter, or "tri-band" if another small midrange driver is added. The main advantage of this solution lies in its simplicity. Because all parts are integrated into one basket, installation is easy and often matches the mounting holes for the original vehicle manufacturer's speakers. Unlike component systems where the midrange and tweeter are physically separated, the coaxial speaker offers an all-in-one solution. Sound is thus produced from a single location, which is particularly practical in areas with limited mounting options, such as the rear doors.