The Zapco ST-X DSP III App allows you to setup and tune your system with your smart phone or tablet for 6X/4X/68X DSP/Amplifers. You can setup Inputs and Outputs, assign the function of each speaker, check the Phase for polarity, and adjust the individual channel gains. You can also customize the crossovers to fit the needs of your individual system. The Delay Page lets you enter cm or Inches for a rock solid and accurate front stage. You can use either the Graphic or the Paragraphic EQ’s. You have adjustments for gain, frequency, and Q factor. You can save a setup-and-tune to the DSP, and you can also save it to a file on your phone or tablet. The graph shows how your adjustment are affecting the signal going to the amp.