PLEASE HELP!!! I setup the Carver av 405 last night, making sure to plug it into the correct outlet on my monster power 3600. I was all excited as it sounded excellent, but then i noticed a steady hum coming from the 3 speakers that I connected (FL, C, FR). I decided to troubleshoot to no avail, below is what I tried.
What we know: When powered on the amp does hum a little, but only audible when close.
Troubleshooting:
1) I unplugged every device (7 others) in the Monster Power unit until only the AVR and Carver were left plugged in (buzz remained)
2) I fiddled with the volume level on the AVR, the hum does not change volume, but is audible over dialog on screen (buzz remained) so as to render it unwatchable
3) I moved the Carver to another outlet and tried connecting my phone up through the proper cable. I ran speaker wire to a Bose speaker (from my garage) that I had lying around and here's what I found.
- The speaker does not hum when connected to the Carver when it's powered on
- I plugged in my cell phone (using rca cable adapter) and didn't initially hear the hum, but after a few seconds it was back
- The hum disappears when the RCA plug is disconnected and the carver remains on.
It doesn't appear to be a ground loop as everything started plugged into the same Monster Power 3600. Does anyone have any ideas?