My Subwoofer Hums (1 Viewer)

[Johnny Angell]

At first I thought something was wrong with the SW, but then the humming stopped. So I rewound on my DVR, and the humming restarted and then stopped in the same point. It appears to be content related and I’m watching CNN. When I watch what happens when it stops and starts, I don’t see a change in screen or audio content that would cause this.

I have recently installed a new Denon X6500H and run the AVR calibration.

Jeez, I don’t know what’s causing this.

 

[JohnRice]

I sounds like it was in the source audio, so there would be nothing to do about it.

 

[dpippel]

Could be ground loop hum caused by one of the components in your chain. You can find plenty of troubleshooting info if you Google it.

 

[JohnRice]

Could be ground loop hum caused by one of the components in your chain. You can find plenty of troubleshooting info if you Google it.

But, if it was a ground loop, it wouldn't start and stop at the same point in a program. At least I can't figure out why it would. It just sounds like it was in the program audio.

 

[Johnny Angell]

But, if it was a ground loop, it wouldn't start and stop at the same point in a program. At least I can't figure out why it would. It just sounds like it was in the program audio.

I’m thinking this too, but I don’t know why CNN was broadcast a hum.

 

[JohnRice]

My best guess is it was caused by how interviews are being conducted, using less than professional sources. Streaming from iPads, web cams and such. I suspect one of them had a low frequency hum, and when that source was shut off, it went away. Just my best guess.

 

[dpippel]

But, if it was a ground loop, it wouldn't start and stop at the same point in a program. At least I can't figure out why it would. It just sounds like it was in the program audio.

Very true. I was just throwing it out there as a possibility, especially since he recently added a new receiver to the mix.