X1-DSP APP is used to tune amplifiers with built-in interactive audio signal processor. It offers complete control such as : 31 band EQ with selectable frequency and Q, 6/12/24/48 dB crossover with selectable filters, time alignment in ms/cm/inches, grouping, preset and custom setting memory, the versatility is endless. All adjustments and DSP functionality are configured via external device with X1-DSP app installed.