SONY THREE BOX High Power Audio System with DVDA three box audio system designed to deliver powerful sound, booming bass, and great clarity for large spaces, making it ideal for parties and events. The SONY MHC M40D is a three box audio system that delivers powerful, high quality sound with an impressive bass boost. Ideal for large spaces, parties, or events, this system is designed to bring music to life with clarity and power. It includes an integrated CD player and FM tuner, as well as