speakers or PSU problem??

Shantanu Ghose

Honorable
Mar 17, 2013
990
0
11,060
specs:
asus p8b75
i3-3210
gskill ripjaws 4gb ddr3
seasonic 520w psu
acer X193HQ monitor(VGA)
creative speakers 2.1
no graphics card

the system has been upgraded from the prev one sice only 6 months(except the speakers and the monitor)
i had noticed some two months ago that the speakers were amplifying what seems to be fan sounds of the PSU or the motherboard if the system was running only on UPS battery,,,but today i noticed that the same sound was coming out when the system was running on AC mains,,i have to put my ears on the speakers to actually hear this,,the more i turn up the volume,,the more it is distinguishable,,, it doesn't matter if i am playing anything through them,,it doesn't happen when i have my headphones plugged in,,,,i don't know whats causing this?? is it negligible or should i be worried?? is the PSU faulty??
 

Traciatim

Distinguished
It's not the PSU or the Speakers. It's power interference from cheap shielding around audio connectors and cables. The only way I've ever been able to get rid of it is switching to a dedicated sound card. I get it a tiny bit from my motherboard back connectors, and I get it really bad from my case front connectors (assuming they just use cheap cables/connectors. Some machines I build have it and some don't, I've never been able to pinpoint exactly why it happens to avoid buying the gear that does it.