Question about KEF Audio KHT 2005.2 System

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Subwoofer not working

Trying to help a friend with his problem. The power on the sub woofer comes on but absolutely no sound...not even a hum... Cable connections are ok but will use a new cable to eliminate this being the problem. Does this sub use a fuse? Please suggest other things to check thanks

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Re: Subwoofer not working

If u are a technician then its easy to check, problems are, blown fuse, power amp IC output transistor may be blown, check for burnt componenets. changing and blowing a fuse means ur output IC or transistors are shorted.

Posted on May 15, 2007

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Fault is either from the main system or the sub-woofer itself.

You need to test both unit in order to detect which of the two is giving the fault, so that you can concentrate on the faulty unit.

Test the woofer with a AA battery or any other battery. Put your ears close to the woofer and observe if you will hear any sound. If the woofer makes sound, then it means the woofer is working, but if it doesn't make sound, then it means the woofer is defective. Or you can disconnect one of the working speakers and connect the woofer to that part. If there is no sound, then obviously, the woofer is defective.

If the woofer seem to be working, then the unit needs to be tested also.

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No I cant get my sub woffer to work woofer.There is power to the unit .I am trying to connest it to a sound bar which has a sub out.

If there is power to the woofer then a signal input must power the woofer to work. So feed a test signal or a audio siignal from a DVD and if there is no output then the AMPLIFIER section had faults.
Unless the sealed unit is opened it cannot be tested to confirm if the output , the input to the AMP or the power supply has failed.
Check if there is power to the output section to confirm.

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Bose 2683 Powered Subwoofer is part of Bose Lifestyle 5 system, Please note that you will need the 5-pin DIN cable that connects the subwoofer to the base or "Music Center". and the 4 pronged connections for its own stereo speaker output not input from another stereo..
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