I have a jbl sound bar with the wireless subwoofer I bought it nov 2016 I never had a problem but this morning I was trying to play music as always but it didn't connect but I can see it is on though

SOURCE: Crackling Sound From Subwoofer

Check any wiring coming or going to the subwoofer. It sounds like it could be a loose connection.  Is there a LFE or bass boost knob on your subwoofer? Does turning that up/down cause the crackling (if it exists). If so, you could use some tuner cleaner to clean the contacts on the potentiometer knob.

If the crackling is on the subwoofer only, it might be damaged from bottoming out.  See if you can remove the baffle or grille covering the woofer and inspect for visual problems. You can also try to lighly push in and out on the subwoofer to hear if it makes any scraping sounds. If so, it is definitely damaged and the driver will have to be replaced.

Mike

SOURCE: jbl 12 subwoofer

Winslow is correct. It is likely to be a bad capacitor on the power supply. There should be two large capacitors on the power supply circuit. These capacitors filter the 60Hz waveform from the power. These will be the two largest capacitors in the entire system. The bad capacitor is probably bulging. For safety, you should replace both capacitors with exactly the same uF, voltage, and temperature ratings. Don't use anything smaller than the ratings of the current capacitors. And don't waste your time going to RadioShack, they won't have any big enough capacitors. It would also be a good idea to check any resistors that are near the capacitors, if you see a slightly larger resistor that is burnt, then you will probably want to replace it.

SOURCE: My JBL SCS200.6 subwoofer coughs

It sounds like the voice coil is blown. You could price just buying a replacement sub for it or pricing a whole new unit

Joe Lamb

• 463 Answers
• Posted on Apr 03, 2009

SOURCE: pb12 makes thumping sound after warming up

Hello there..Thats normal only if your sub volume and the pre amp is turned up..Your amp is the cause of the speaker jump..Turn amp volume sub level down a few and check your wire from sub to amp..If all of that is good is a normal operation for pre amp warm up in sub if level is turn to max..Try unplugging amp freom sub then turn sub on stand alone(just sub outlet plugged in and no wires from base amp plugged in..If sub stops the its the amp making the problem..If it still is there then the pre amp is either dusty on inside or the outlet plug that it is plugged in doesnt have a good ground..Hope these help to solve your problem..Have a great day...

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SOURCE: JBL Creature 2.1 Left Speaker not working

Hiya

Too late to resolve the original poster's worries, I can assume, but I arrived here when searching on account of the same problem and resolved it. This is going to sound implausibly condescending, I'm afraid (and excuse th elack of technical terminology!)...

I couldn't get my left speaker to work exactly as above, but then looked carefully at the shape of the respective cables leading to the sub. You have to fit the triangle shape of the lead into the triangular shape of the hole. The speaker CAN be connected what *feels* like correctly, but is in fact connected incorrectly (ie, not all the way in).

This is more a problem with the left speaker than the right since it's a triangle and the right is a square, and can be a little fiddly.

Anyone else experiencing the same problem should probably take a quick moment just to check this isn't it! :)