A good PLC will have several duplexes (pairs of plugs). The duplexes should be isolated from each other. In many cases the manufacturer will specify one or more for digital and one or more for high current like power amps.
But at the very least plug the CDP and the amp into separate duplexes. As you may have gathered by now, digital devices tend to throw noise into the rest of the system if not isolated. After you get the PLC up, your next move is to put a specialized cable on the CDP to increase the isolation.
BTW I highly recommend the BPT power products
But at the very least plug the CDP and the amp into separate duplexes. As you may have gathered by now, digital devices tend to throw noise into the rest of the system if not isolated. After you get the PLC up, your next move is to put a specialized cable on the CDP to increase the isolation.
BTW I highly recommend the BPT power products