The PL-9 is a 7 way PL-Anet hub which extends the capabilities of the Allen & Heath PL Series of wall plates and remote controllers. It can address up to 15 PL devices per branch up to a system maximum of 24 depending on the type of devices and distances involved. It has a built-in mains power supply to boost the PL-Anet 20V fed down each cable to power the devices. This means that larger systems can be created and connected over longer distances. It can also simplify and reduce the wiring required by allowing a ‘star point' connection scheme. In smaller systems the PL-9 can allow individual devices to be connected independently to the iDR audio processor using single cables rather than being chained together.