20 Most Recent KEF Audio PSW 3000 Subwoofer Questions & Answers

the conections some where are dirty you need to unplug everything clean all connections and the hum will go away

I had the same problem. It is a loose conection on the print. The Amp unit goes into failsafe mode. You can check the Rc control. You are only alowed to turn it on and off. No signal regulating.
The solution is to remove the backside, and check the print for bad connections or even broken parts.
I experienced one leg on a transistor tha had broken.
Good look

Try this website for KEF. They have all the manual downloads and I fixed my circuit board from calling them and asking for advice for free. The number or email to get a reply is here. Happy Holidays.

Mike

http://www2.kef.com/us/support/warranty

Hi I am afraid it sounds like exactly the same problem I had, Namely the PSU(power suplly unit) is failing, This is a common fault (by reading loads of forums) I contacted KEF today about mine and they say the probably wont be able to source any more spares(due to so many having thuis problem no doubt) So I would suggest contacting the people you bought it from,Under the consumer protection act you should expect an electrical item to "Last a reasonable amount of time" .Mine is 3 years old and I do not consider this to be a long period so kick up and you should be entitled to a repair or at worst a partial refund.Look here basically the same Sub.
http://www.avforums.com/forums/showthread.php?t=436234&highlight=kef

Either you need new high quality cables,or your amp has output filter capacitor problems.

Check main fuse or power cable.

a capacitor could be overheating and cutting out.then,when it cools you get sound again.this will go on and on until you take it to a tech to get fixed