Hello! I am new to this Forum and I dont know alot about home audio. I just bought a PWS10 sub. I have it connected to my soundbar from its sub out jack to the PSW10 using one cable to the left input jack of the sub. I have the auto-off feature of the sub turned on. Howerever when my soundbar and tv are turned off the sub stays on with a constant low hum. Is there somthing that I doing wrong? Thanks for your help. Mike in Indiana.