Folks I believe I have all all my distances set, speakers calibrated, and I am happy so far. However, I have developed what I call a "static discharge" occuring on the center and left surround speaker. Its almost like a "popping" noise and it is my apparent / consistent on the center speaker however louder on the left surround. I can actually enable an unused path such as VCR more the Main Volume up and down and actually hear this static noise occcuring in the center speaker..

This "discharge / nosie" mainly occurs when I either Turn on the system or when I switch between sources on the AVM 20.

any ideas? I have an idea but don't say for fear of sounding stupid, so I would appreciate any input from the "pro's." many thanks in advance!!!