ALL-IN-ONE SOLUTION: The combo set includes one CARME-115BPW 15 powered PA speaker, one CARME-18SPW 18 powered subwoofer, one STSD-M20B subwoofer/speaker extender pole VERSATILE APPLICATIONS: The speaker combo is ideal for meeting rooms, courtyards, churches, restaurants, stages, weddings and any other small to medium venues. Both the PA speaker and subwoofer are powered, and it makes the setup a breeze OUTSTANDING SOUND QUALITY: The 15 PA speaker with 1 3/4 titanium compression driver generates clean audio and stellar quality; The 18 subwoofer serves up solid and mighty bass reinforcement SOPHISTICATED DSP: The powered PA speakers DSP doesnt only come with factory presets, but also allows you to customize the settings through a software (which needs to be downloaded separately). The sophisticated Digital Signal Processing technology enhances speaker performance and guarantees accurate and undistorted audio across the entire sound field