Installed a Marantz SR6016 before Christmas. Speakers are Monitor Audio CPIW260X x 7. Got everything installed and there was a loud buzz in 5 of the 7 speakers. I had the electrician look at his grounding as I thought it was possibly a ground loop. His connections were fine I disconnected all source inputs, subwoofers and plugged AVR directly into the wall. Checked the speaker connections and found no frays or wire touching the chassis. My thought is that I have received a DOA AVR. Is there anything else that I can check?

I was reading the thread below about Yamaha. How does Marantz quality compare to Yamaha?

[Link: remotecentral.com]