subwoofer noise (1 Viewer)

[Kym O]

I just replaced a sub in my two subwoofer setup(I now have two 10 inch, 120 watt subs)and when I plugged it in, I hear a " switching on/off noise" in the new sub. I don't hear this coming from my other sub and I did not have any cables hooked into it. What could this be? Has anyone else experienced this? Any suggestions? Please Help, I've been dying to hear my new set up.

 

[Chris Tsutsui]

Could u tell us more about the setup like are your running it from a receiver? and how do you have the 2 subs connected.

Right now I have a similar problem on my home theater PC. My subwoofer randomly plays distorted low noises (Sounds similar to when u first turn a powered sub on). I also hear severe distortion noises when I click "Forward" or "Back" when browsing web pages with the subwoofer on. The distortion is so loud that I can actually see the driver move in and out with each click of the mouse. This is the case only when the amp is turned on and the volume up to about half way on the amp and processor.

I have tried a different sub cable so that isn't the cause. I believe the sound card (hercules GTXP) is receiving low frequency distortion from my mouse or motherboard or something because the distortions are random, even when not touching the computer and watching a DVD.

Edit: Ok this has got to be fixed, I just maxed the volume and was overwhelmed with a massive distortion hit after clicking on a few things. It had to be in the 100db range because it shook my house, woke the dogs, and nearly gave me a heart attack.

 

[Kym O]

I am using the L/C/R pre-outs on the receiver into each sub and running these speakers as Large. I have tried plugging the sub in different outlets around my house but I get the same results. To describe the noise more accurately, it is a low hissing noise followed by an intermittent thump. Almost as if someone is turning a light on and off.

 

[Mike Strassburg]

Sounds like a voltage spike. Can you move the sub & PC to different electrical circuits? Perhaps a power conditioner would resolve this.... Do a search. Good luck...Mike