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.FEATURES Built-in 4CH input, 4ch (25W/ch & 4ohm/40W/ch @2ohm) output amplifier with 2ch non-powered outputs Hi-level & Lo-Level audio signal input w/Summing Small footprint capable of powering your audio system or used as a line driver to power large audio system Simple and easy to use tuning software Wiring harness, installation hardware and easy to use manual included Easy to integrate DSP processor that is not overly complicated to use Great performance Multi-language tuning capability and ease of use (EN,SP,FR,JP,CN in EQ tuning GUI, multi-language owners manual)