Not sure if this is the place to ask such a question, but wondering if anyone has experienced this type of issue before.
The problem I have is that if I switch to my RCA inputs that connect from Motorola PVR to preamp, with the PVR power turned off, I hear quite a high pitched buzz through the speakers.
I previously had a NAD T753 surround amp and it suffered this problem, and now I have a NAD 2 channel amp and Cambridge Audio 840E preamp and still the same problem. I can leave all components turned off, and in turn switch to all of the other RCA inputs and no buzzing from the speakers, meaning all other sources are quiet when they are powered on or off. I have tried replacing the RCA cables between PVR and Preamp, to no avail.
My concern is that the PVR is creating some noise in the system which may be affecting what I hear from all of my other sources, since the buzzing/noise is there even when the PVR is turned off.
Do I need some type of filter between PVR and preamp? I have tried replacing the power cable on the PVR with a Shunyata Venom AC cable and that did not make any difference.
Thanks in advance,