Electronics > Beginners
Ferrite cores and audio lines (stereo)
(1/2) > >>
faekjarz:
Hi!

I'm noticing some audible, as far as i can tell w/o an osmelloscope, high frequency interference on my 2(+1 subwoofer) stereo PC speakers (Logitech X-210). It sounds like tinnitus, and yes i double checked, it's not my actual tinnitus. I already galvanically decoupled the signal line without improvement.

Adding a ferrite core, straight on, or double through, didn't improve the situation.

1) Is there an actual application of ferrite cores on analogue stereo audio feed lines?
2) Why, or why not?
3) Should i take the thing apart and look for worn out components, something obvious like caps and stuff?
4) Should i re-route the audio feed line, and separate it from digital cables, like Ethernet, HDMI/DVI, or even mains power supply lines? (Why?)
tszaboo:
Ferrite works in the MHz range, audio is in the KHz range. Unless you can prove that the noise is RF interference, it is not going to do anything with the audio.
JS:
Did you tried the speakers with a different source than your computer?

Onboard audio cards are well known for introducing all kind of noises, some of them could be reduced decoupling the signal as you did but some can't. If that's the case getting a USB card could help. Expending a bux more for a good known audio brand one would be even better if you want low noise.

JS
faekjarz:

--- Quote from: JS on May 23, 2018, 09:34:40 pm ---Did you tried the speakers with a different source than your computer?
--- End quote ---

Good point!

The noise persists with a different source (my smartphone), and even without any source. So, it's just a noisy speaker system, i guess. It's a fairly old one, and i bought it pre-owned, a few years ago.

I'll probably turn it off and take it apart; any recommendations what i should look for?
BergRD:
osmelloscope = AvE?
Navigation
Message Index
Next page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod