Overview The dbx DriveRack PA2 Complete Loudspeaker Management System is a loudspeaker management system that can be controlled via your Mac, PC, or mobile iOS or Android device. Using an optional microphone connected to its RTA input, its AutoEQ function can be employed to listen to your room and automatically EQ it for optimized speaker performance. The AFS (Advanced Feedback Suppression) feature is designed to eliminate feedback while preserving the sound of your system. This kit also includes DBX DriveRack Measurement Microphone (RTA-M) is an electret condenser microphone for use with the Real Time Analyzer function of the DBX DriveRack Control Processors. In the box* dbx DriveRack PA2 Complete Loudspeaker Management System • Limited 2-Year Warranty dbx RTA-M DriveRack RTA Measurement Microphone with Clip • 2 Year Warranty