PC speakers always buzzing

[Paul36x]

I did my best solving this last year but never managed to and it still annoys the hell out of me. My PC speakers are always buzzing. Sometimes very soft, sometimes pretty hard without there being any visible changes to cause it. I've even had radio songs come through it very softly a couple of times.

It's a cheap set of Microlab tweeters with subwoofer, I had an expensive Altec Lansing set for a couple of days and it didn't buzz at all but the sound was horrible for my music so I returned it.

I tried repositioning it, bought better audio cable, replaces the jack plug with cable to the pc, nothing really helped.

 

[WDMDL]

Poor circuit design.

Possibly a ground loop if the buzzing stops when the input cable is unplugged from PC.
For the radio interference, you'd need to be soldering in some RF decoupling capacitors on the circuit board, but that involves a bit of calculation and determining the circuit topology, so tbh you'd be better off getting another set of PC speakers for what they cost.

Simon.

 

[baldsparkies]

It does sound like poor screening, if the supply transformer and the circuit design is budget quality, you are on a hiding to nothing. I would bin it and buy something better tbh.

 

[Adam W]

I agree - as the saying goes: "You can't polish a turd".