My JBL PB12 suddenly started flickering on and off repetitively. Oddly enough, it seems to do it with the bass line. We've never had a problem out of it before - always gotten exceptional bass but now, after 3-4 years, it started this. The lights on the front will flash from green to red and the bass won't make it through. You can trick it by leaving it off for awhile and turning it back on but it will only work for a moment. I have tried changing the power cord, the a/v inputs, all the settings, EVERYTHING but I cannot figure it out. Please help!! :-) Thanks!
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First try to find the source of your problem. The easiest way would be to try your sub with a different audio source to see if the problem still occurs but is sounds more like there's a problem with the receiver.
It sounds like something on your main board of your amp is going out. It is most likely the finals, or as you said a capacitor. Test the port with another speaker, if al is well then the wooferis bad. if not you will have to go inside the amp for repair. Depending on the brand it can be a little complicated. Try and narror it down to the proper componet, post back the results and we will go from there. Also is this sound comming from all channels or just the woofer?
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...
This particular product has a lot of comments posted on it and I've answered a few of them now so I'm beginning to think you may want to look into weather or not the manufacturer has received any complaints or this is just a freak occurrence. Keep in mind not all commments are the same so this may just be nothing. Either way I can tell you this much, if fuses keep blowing quickly, over and over again-You have a direct short somewhere and will most likely be in need of professional assistance of some sort with the possiblilty of having to replace it. I'm sorry it's not an easier fix but it may not be too expensive.