Question about JBL BassPro Car Subwoofer

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Jbl sub power dumb blonde needs help!

I have a BTX 250 bass tube, it has just stopped working. The power light is flashing, it is usually just on. I have changed the fuse and checked the wires. I have someone coming to view the car in an hour......please help.....quick!!! stop working light on and power to sub but no output NO MUSIC NNNOOOOOOOO!!!!!!!!!!!!!!!!!!!!

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Sound like something shorted out or is shorting it out sounds like its in protect mode.-z

Posted on Feb 21, 2009

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I have a scocshe 500 watt amp and the thermal light is on, since today, it has been install a week ago and played fine sine, however my headlights flash when the music is to high big bass. could it be the...


  • The lights are fading in and out on your car because the amp is draining far more than the alternator in your car can contend with. No doubt that amp is boss but your killing your battery and can effect the vehicle as well.
  • After a while this will wear that battery down and need replacing.
  • Thermal mode comes on when the amp gets to hot and the amp shuts down and stays shut down until it cools down sufficiently. this is an internal switch.
  • You can try removing the power feed wire for two minutes and then re-attaching it and see if this expedites the resetting internally of it being in thermal mode. Sometimes this works.
  • Check the fuses and make sure you did not blow any from a surge. This is where the lights fading in and out is dangerous to an amp. Every time the lights fades it power surges that amp. There could be some internal damage from this as well.
  • Remove the power feed for 2 minutes see if that helps. Let it cool down overnight and see if that helps. Check the fuses (either in line or in the amp itself) as well. If none of this helps you need to open the amp and look for black spots on the board and or blow electrical components.
  • Or you can take it back to the place you got it from and try for an exchange.
Regards, Tony

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