The ACD1 Amplifier Control Device provides a convenient, reliable means to connect a computer running Yamaha’s advanced amplifier control and monitoring software to Yamaha Tn, PC1N, XP, XM and XH series power amplifiers. Up to 32 daisy-chained Tn and/or PC1N series amplifiers can be connected to the ACD1 DATA PORT connector via standard Ethernet cables, while as many as 8 XP, XM, and/or XH series amplifiers can be connected to individual MONITOR/REMOTE connectors via appropriate cables. That’s a total of 40 power amplifiers via a single ACD1 unit.