crackling speakers

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Coach

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Sep 26, 2012
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hi all

some help please.
i only use my system on weekends(mainly)
last saturday i used the fogger in my place to kill roaches - i mention this cos my system was fine before this.
that afternoon after the fogger, there was a crackling in the speakers so much so that it escalates to a screech.
now the crackle is slight, and i can hear it from the speakers that are connected to the avr and the fronts which are connected to the power amp.
last night i noticed that even when i had switched off the decoder and tv, there was still some creackle from the speakers.

please help
thanks
 
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