The 2 input, 6 output DriveRack PA+, Loudspeaker Management System. Although the DriveRack PA+ is loaded. with functions and features, it is easy to set-up and use. The dbx exclusive Set Up Wizards walk you through system set up with easy to follow step-by-step instructions. Just pick your speakers and amps from the built-in list on the PA+ and then let the Auto Level Wizard™ fine tune the level settings of each speaker. You can then let the Auto EQ® Wizard help you further optimize your sound. Finish up by using the AFS Wizard, which automatically sets filters to eliminate any feedback during performances.