What is the 15-pin (DataPort) connector on the DSP-4 used for?
When using the DSP-4 module with QSC’s amplifier network monitors, the audio input to the module can be delivered through the DataPort along with amplifier control and monitoring signals. This is the normal application of the DataPort. Connection from the module to the amplifier network monitor is made using a DPC-X receptacle-receptacle QSC DataPort cable. Alternatively, the DataPort connection can be used ONLY for control and monitoring, while the audio is input via the XLR inputs. If using the DSP-4 in this manner, do not apply audio via the DataPort as it will be mixed with the XLR audio input.