My Klipsch self-powered subwoofer goes "POP" at random!

[JDBarrow]

It sounds like a phonograph needle that hits a big scratch on a record. It can make my heart jump at times. This periodic pop only happens under the following circumstances:

1. a computer is the hard-wired audio source (via analog audio cable and green line output jack on motherboard) for the Marantz audio receiver hooked up to the sub. I have to use the CD in jack on the Marantz as it has no RCA input for computer specifically. I use a 3.50 mm OUT to RCA L/R plugs IN cable.

and

2. the audio media is a PC game like N3V Games/Auran Railroad Simulator

or

3. the computer is idle, not playing any sound media at all


I have not noticed any POP when the active PC-based audio media is something like a You Tube video stream or digital music playback on something like Windows Media Player or Groove Audio. There is never a POP if the source is television audio, AM/FM receiver audio or Bluetooth-paired telephone audio.

Please, pray tell me, what these intermittent POPs are all about. My computer does have a noise suppressor cable on the CPU cooling fan.

 

[Bones13]

Any chance of static build up from carpet?

 

[JDBarrow]

Any chance of static build up from carpet?

I have laminated flooring in the living room with a 7' x 10' area rug. My thought is it might be random electronic noise from the PC that gets amplified in the home sound system. That kind of POP when you plug in or pull out an audio jack with a live signal, voltage or current in the wire or when a telephone wire is snipped during a conversation.

 

[Bones13]

I’ve read reports of other major appliances causing electrical noise. The one I read about was tracked down to the refrigerator.

 

[stereogeek]

I’ve read reports of other major appliances causing electrical noise. The one I read about was tracked down to the refrigerator.

Thats exactly what I was going to say. Or an air conditioner starting.