Possible solution - this can be caused by a fault in the receiver unit. the sub has a triac 'high side switch' circuit that can cause the fuse to blow if it doesn't get a good switching signal e.g. if the receiver power supply is not running at the full voltage. check the plug pack wire for damage, check the 12v input area on the receiver board for dry joints, particularly the power input socket. hope this helps.-pj
SOURCE: klh powered subwoofer keeps blowing fuses?
then the circuits took a hit and the fuse didn't do it's job in the 1st place. best is too get new circuit thats inside the sub woofer.
sorry to be the bearer of bad news
SOURCE: subwoofer blows internal fuse when receiver is turned on
Has it ever worked?
Try this - connect one pair of its speaker wires at a time and test it. Watch the polarity.
• Make sure all cube speaker arrays are connected to the proper terminals according to their
position in your room.
• Check to be sure all wires are connected to your surround receiver with the proper polarity
(+ to + and – to – wires). Incorrect wiring can result in a total loss of module output.
• Correct any wiring problems before you plug in your receiver and turn it on.
SOURCE: subwoofer blowing internal fuse as soon as you
check your bridge rectifier if no short,audio stage is blown
SOURCE: Subwoofer blows internal 1.25A fuse when plugged
Any fuse blowing is caused by an overload in either the power section or the amp part. Look arond for burnt or damaged parts first. It could be caused by a shorted transistor, but your best bet is to follow the circuit from the fuse on the PC board.
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