Hi everyone, I am a newbie, hope somebody can help. I have searched for a solution to my problem but nothing mentioned in any thread has worked. I recently installed a Vibe Alpha 11 subwoofer to my system which I think is causing the problem. I am getting unacceptable rear speaker humming/buzzing even when the amp's volume is zero. But if the sub is disconnected or turned off the speakers stop the annoying noise. I have as follows; Toshiba 36zd26p Yamaha A492 Kef Q35's Kef Q95c Yamaha NS E103 rears Any help will be greatly appreciated.