My trusted old logitech z-680 subwoofer seems to have developed a snag. It makes crackling sound/crackles when anything is played, earlier it was not noticeable but now has become more prominent and is becoming disturbing. I am connecting it to my PC via coax.
Any place where I can take it for repairs ? 
Anyone ?:help:
Its coming from the sub when there is any bass played, crackling sound like those old casette players/amplies filled with carbon when u turn the volume knob.
Any good electronics/music shop in delhi who can repair it ?
Is it out of warranty ? The same thing happened to my altec 251’s sub , the internal circuit board was replaced with a new one th their service centre. Go to a logitech service centre and get it checked out.
Its out of warranty. I am not sure if they would be able to replace the internal circuit board or if the board would be available. When I first bought the speakers, the woofer conked off after abt 2 months and they had to replace the entire set, but anyways let me check with them.
Is d driver tats having the prob or the circuitry??
If its d driver, M sure u can replace it with nother one from the market..
Sangram and greenie can pour some inputs here.. 
No idea if its the driver or the circuit, and its difficult to open the back of the sub without having some kind of expertise.
if the problem is via coax(ie a dying decoder) , then chances are that only the authorized guys can fix it. Is it present when you play even at low volumes ? what about when you play via analog ?
You Are In Dilli Right ?
It happens when I connect through both coax and optical, does not seem to be a problem with the decoder as it coming only from the sub. The crackling dissappears when I turn down the volume of the sub to zero. Haven’t tried with analog yet.
@Amarbir- Yes I am from Delhi.