I am going to drop by the SC, and did a search but didn't find anything which is like the issue I am having. I noticed feedback int he speakers when I am using power. I noticed it with the audio completely off. ( Muted and no source selected) The hum goes away completely when the accelerator is not used (regen) I am not sure how lon git has been going on since I usually listen to music. It is slight but noticeable. Anyone have anything like this before? Something well known etc?