Silence noisy powered wall speakers

[mikkydoos]

Hi all,

 

I have a couple of rooms whereby the powered speakers are really noisy - it sounds like interference from the power socket... unless its something environmental.

 

Replacement speakers of a different brand and all new cables offer the same problem.

 

 

They're connected to a micro ATX PC directly from the audio ouput (no wall plates etc).

 

They're quite noisy with nothing plugged into them and noisier still with a device plugged into the input... you can really hear the digital 'chatter' --> hard disk reads etc.

 

The sound when not plugged in a bit is like the FM interference you'd get from a guitar amp... but theres no hum like with an earth loop.... can't think of how else to describe it.

 

 

Any ideas out there on how to narrow it down or isolate the interference ?

 

 

 

Cheers in advance

[Andrew_C]

Isolation transformer. Dead cheap from CPC and the like.

 

Link

[mikkydoos]

Cheers @Andrew_C

 

I'll give one a go. Can't go wrong for a fiver.