"Premium Audio System is equipped with nine BOSE speakers. The system’s 9” Nd Woofers (x2) feature neodymium-boom magnets which exhibit about ten times the magnetic density of conventional ferrite magnets. In addition, the system incorporates 2-ich rear tweeter (x2) and 6x9-inch mid-range speakers (x2). The Premium Audio System also includes an AUDIOPILOT automatic sound field compensator that compensates for noise in the cabin by automatically adjusting volume."
Mazda Press Info