Jbl-125 subwoofer crackling noise

SOURCE: Altec Lansing VS 4221 Right Speaker crackle

First of all take a headphones and connect it to the TV and listen the sound.If it is OK the problem is or the cable or the amp.You probably have two RCA connectors on the cable red and white or black for input of the amp.Connect the cable to the tv again and change places of the RCAs (red to white on the amp and white to red).If cracling is now on the left speaker buy a new cable but if its still on the right you have problem with the amp.And you are right if everything is OK it shouldn't be cracling.I hope that this will help you

SOURCE: subwoofer makes loud popping crackle intermittently

im having the exact same problem thinking it was the amp i rigged up a different driver,the amp was fine.i knew the driver wasnt gone and after some looking and testing i got it down to wire mesh(i think a dust sheild,something)inside which was slightly rubbing on the coil,it worked fine loud when it was warm but cold there was bursts of bad feed back noises.

SOURCE: connect powered subwoofer

SOURCE: can't get my Accurian subwoofer to work

OK if you came out of the receiver sub pre-out RCA jack into the subwoofer RCA jack ( most subs call this low level line in) and no sub sound you may need to program the receiver to tell it that a subwoofer is being used, many receivers have this function, and some default it to NO SUB and them your low end soung goes to the front right and left speaker, so check the receiver manual and look under adding a subwoofer instructions if available.

SOURCE: JBL PB10 subwoofer, it makes a loud burp noise when it comes on.

In the industry - It is called "Turn-On Thump".

There are some manufacturers that eliminate components like noise filters on enry level lines to save money.

There is no way to lessen this noise without ripping the amplifier apart and having a technical knowledge of the way amplifiers work. It would involve hard-wiring a slow charge capacitor in the turn on line so it gradually builds power instead of getting it all at once.

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