Power, Control and Digital Signal Processing. The Dsr1 combines a full-featured 3sixty digital signal processor with a flashable Maestro integration module. The Dsr1 can be used out of the box with high or low level input,or with a quick flash download to add to vehicle specific firmware to enable integration without the loss of factory equipped controls and features. Once connected,complete control of the sound profile can be adjusted using the proprietary Rockford Fosgate PerfectTune software.