The Dayton Audio DSP-408 is a feature-rich 4 input/8 output digital signal processor that was designed to give you the tools to contour your audio system to fit your tastes. This processor is the perfect addition to your home or car audio system. The DSP can be controlled via a Windows PC, Android device, or an iOS device. Unlike most mobile apps for DSPs, the DSP-408 app offers the user full control over the DSP features.