Sub woofer speaker blows both 5A fuses whenever I turn the speaker on

I would expect a shorted component in the power supply

Where was it sitting before it was moved? Did it have it have more ventilation and keep cooler? This sub has a powerful amplifier in it. If it got moved to an area that restricts air circulation around the sub more it is possibly overheating and causing fuses to blow. Put a fan on it and make sure it is on a hard surface or up off the carpet at least to keep the bottom side cool as well. Also when one moves a speaker it's often to put it into a more convenient area to be able to turn it up louder with less disturbance to others. This will draw more power and create more heat within the amplifier than it's previous location. If this is so keep it as cool as you can and turn it down every so often to give the amp a rest. The key here is to keep it cool as you can. One thing you never want to do is put a higher rated fuse in than the unit is rated for. Always use factory recommend fuse rating.

henrylshelt,
Your sub should turn on into standby mode when plugged into AC power without being attached to the receiver. If it does not follow the list below. If it does, the sub needs a signal from your receiver via either by line-level (RCA) or the speaker wires to turn on out of standby. Ensure that the cable or wires going to your sub is in fact sending a signal while the receiver is on. To Test, (speaker wires) hook up a different known working speaker; (line-level) Some receivers have a menu option to turn the LFE output on and off, ensure that it is on and producing a signal.

Diagnose the problem:
1) Remove all wiring to/from the unit except for the AC plug (use a different known working AC outlet), will it turn on? If so the other outlet is not working.
2) Remove the woofer, does the amp have a fuse that need to be changed? Change the fuse. If it blows again after replacing and turning back on, the speaker is blown; go to #4.
3) Unplug the woofer from the amp, does it turn on? If so, go to #4.
4) The sub need to be serviced. http://www.jbl.com/EN-US/Support/Pages/SupportOverView.aspx

-Hope this helps, Chris.

You should open it up and look for a short. Usually, an exposed wire is touching metal. Wrap the wire with electrical tape and look for a ground wires that are loose. That will blow fuses too.

Hiya, start by checking the power cable, then check the fuse in the unit on the pcb. If blown, replace and if it blows again then problem could be either Power supply or the amp outputs. If it doesnt blow, stays on but no sound, problem also likely to be output stage. You will need someone with experience to check outputs, etc and a meter though. Hope that helps a bit.
Best of luck

1 amp 250-volt from radio shack #270-1021

250v 1A fuse

If your fuse keeps on blowing after you cg=hanging,that meens that there is a shortage.check it first using the multimeter.good luck.

good day, check your spkr impedance, if 4oms use a posive spkr dividing network. if stills blows up replace a higher amperage of your fuse. ex.4A raise it up to 5A. the your amps consume higier current if more spkr wattage.

NO dont try a 3 amp fuse.It is made to BLOW if there is a problem. That sub is not worth fixing, JUNK it. There are a lot of problems with it. Such as heating up and melting the board witch could cause fires. Thats what happened to mine. Like I said JUNK it and buy a different one.