Question about KEF Audio PSW 1000 Subwoofer

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Weird burbling muffled squeak noise!

When my sub is not in use it makes a strange burbling noise which doesn't seem to come from interference - could it be the power caps? theres 2x 10000uf and two smaller 300uf near the outlets. also it does sound wooly and not tight but that could be my room - it's only small! The phase shift pot minimises it at 180'. I don't know how old it is-? bought it on ebay a year ago. It started making the noise two months after i bought it. serial bar code is 992071g. I hope there is a solution, can you help? Kind regards, Duds

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Re: Weird burbling muffled squeak noise!

You can simply and easily replace 3 capacitors on the main amplifier board (c58 - 47uF 63v or 100v) + (c52 & c53 - 220uF 25v) but stand them away from the board on the length of the capacitor leads to prevent them from absorbing heat from surrounding hot components (with heat shrink tubing to prevent shorting)

these are usually the cause of most problems with KEF PSW subs, as for it sounding wooly, this is just the way it is, mine is the same.

Posted on Nov 07, 2011

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Salutations valikan,

It sounds like you may have some basic interference either in your power, or other sources. I have something similar when my sub is not in use I pick up talk radio, it drove me in sane for months untill I figured it out.

There are a few things you can do to help eliminate interference would be to purchase a surge protector with a power "filter" or conditioner. Also check the cabling to your sub-woofer if there are any breaks or weak spots in the insulation this could be causing interference as well.

And as always if possible read through your owners manual to see if there are any adjustments that can be made on your sub-woofer it self.

Hope this helps.
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