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How can I stop crackling noise from speakers?
How can I stop crackling noise from speakers?
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Old 5th May 2012, 03:27 AM   #1
zBernie is offline zBernie  United States
diyAudio Member
Join Date: May 2012
Default How can I stop crackling noise from speakers?

I have a pair of Behringer MS20's speakers connected to an Apple TV via an optical cable. When I power on the speakers, and start to play music, there's a loud crackling sound, and I cannot hear the music. I then pause the music, then hit the play button again (on my iPhone or iPad), and the music plays fine. This is reproducable every time I power on the speakers. I have a similar setup in another room except they speakers are Behringer MS40's. I tried swapping the optical cable, the shielded speaker cable, the speakers themselves, and with the MS40's connected, the crackling occurs. I then tried plugging the speakers into a different outlet, and no crackling.

I'm almost certain the problem is with the outlet, which my TV and other equipment are also plugged into as well. Can anyone recommend how I might mitigate this crackling noise? Is there some type of line filter I could use?

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Old 5th May 2012, 04:07 AM   #2
Inductor is offline Inductor  Portugal
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Join Date: Feb 2006
Location: Cascais
Try disconnecting the TV antenna first and see if sound is better. Also your country/flag my help with the new connections, for pro-members technicians/engineers.
I had a similar problem with a KEF subwoofer (active) that was making a zummm sound, easy solution, I stopped using subs. My problem (had no antennas) I think that was with the different ground connections from different Amp-sets and maybe not using shielded cable, also from the mains (caps?) Surge Suppressors/Protectors, this in my case.

Last edited by Inductor; 5th May 2012 at 04:19 AM.
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Old 5th May 2012, 04:59 AM   #3
wwenze is offline wwenze  Singapore
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Join Date: Mar 2008
Your symptoms sound like the speakers are unable to lock the signal properly on the first try, but you say a different power socket solves it, hmm...

Maybe the SPDIF connection is borderline useable, and extra noise from the AC killed it. Try a lower sampling rate/bit-depth? Or perhaps another source.
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