Speaker static

[Alienwho]

I inherited a crappy old RCA RT2770 5.1 receiver. I plugged it into my green onboard audio connector in my computer. Anyway, that doesn't matter.

When the amp is on my speakers (Klipsch Promedia 5.1) emit a subtle yet intolerable static noise. Most people probably wouldn't notice it but I have sensitive ears and it just pierces them. Everybody knows and has heard the static I am talking about. Nothing else is connected and I am using the speaker wire that came with my speakers. I know the problem isn't the speakers because they didn't have this problem before.

I read that maybe it is a grounding issue but I don't know how to ground it. There is a GND option on the back of the receiver, and I tried connecting that to a screw on the wall and different metal objects around my desk using some extra speaker wire and nothing happened.

Any ideas? Just a crappy receiver? I'll ask the guy who gave it to me tomorrow if he had the same problems.

 

[unfalliblekrutch]

It's probably the onboard sound card making noise.

 

[Alienwho]

No it makes the noise even if everything is unplugged. Just the simple act of having the speakers connected and the receiver turned on emits the noise.

 

[Thump553]

I have my doubts on the objects you are grounding to. Just because it's metal doesn't mean it's a good ground. If you have baseboard heat, try grounding it to the heating pipe inside the baseboard (fins OK too).

 

[Howard]

If there's static even when everything is unplugged, I'd guess that the receiver is picking up EMI somehow. Don't know how you could solve that, though.