RM705 SW buzz

abrost
abrost Posts: 1
edited April 2010 in Troubleshooting
I just purchased the RM705 5.1 surround kit. While the surrounds are nice and clean, the subwoofer has a buzzing problem. I have sifted through the postings on this issue, but none of the suggestions will clear the noise - it sounds like AC hum. The level is very noticeable, especially when the system is in standby.

The RM705 5.1 is set up in my office. My home theater has an Energy ESW-V8 sub, so I swapped them around to see what would happen. When I hook up the Energy to the existing office receiver (Yamaha RX-V365) the hum goes away, and all is normal. When I hook up the RM705-SW to the home theater amp, I get the buzz where it was quiet with the Energy. So it appears that there is some problem within the RM705-SW amplifier.