Infinity branded DSP audio processor for fine-tuning of aftermarket audio systems. It is a self contained audio system with 4ch audio inputs, 4ch powered audio outputs, 2ch non-powered outputs an easy to use tuning interface even a novice can understand and detailed tuning capabilities to satisfy even experienced installers. The DSP software features crossovers and slopes, time alignment, HP & LP Filtering and of course it offers an EQ, both parametric and a paragraphic. It has 31 frequencies per 4 channels.