The ARC Audio PSM Pro digital sound processor is a small but powerful device that is designed to enhance the audio quality of your car or motorcycle's sound system. It is an upgraded version of the PSM offering even better performance and 8 channels of output. The PSM Pro uses advanced 32-bit DSP technology and has 296 total bands of full variable parametric equalization, open architecture crossover selection, signal delay, and phase control. This allows you to tune your audio system to your specific preferences and improve the quality of your listening experience.