Question about Speakers & Subwoofers
There has been a buzz on mainly the sub woofer but if you turn up the sound you can hear a feint buzz on the speakers
SOURCE: 100watt sub
There is a problem wwith teh power supply or the amp section. Does the noise remain constant or does it vary in volume? The sub should have a level control, does the noise vary with that control?
Posted on Mar 20, 2008
SOURCE: No bass...
One of a few things.
The fuse inside the amplifier section is blown.
The amplifier has died
The speaker is dead.
Best to return to the place you purchased the unit or contact Velodyne for service.
Posted on Jan 04, 2009
SOURCE: sub woofer buzzes all the time
ur sub wont buzz due to bad speaker. either u have a faulty preamp or power amp. yes it can be repaired and will not cost much. if it is loud and annoying, get it repaired. sometimes subs emit low hum when powered up. this is the way the are desinged.
Posted on Apr 13, 2010
Testimonial: "Thanks, That's what I needed to know, so now I'll look for whats buzzing and not new speakers"
Sorry I can't solve your problem. I think the main fuse on mine is blown too. Can you tell me where it is located?
Posted on Sep 01, 2010
SOURCE: The amp on my kef
Ok so no guarantees this will work, but it did for me and I knows it's very late but hopefully it will help someone else with a similar problem.
I had the same problem and as clmrt5000 said a very long time ago there could be an issue with a ground loop, although this is likely to give a high pitched buzzing sound.
This can easily be fixed by adding a switch to disconnect the mains earth from the back plate, or you can just unscrew the earth and tape it up, this fixed my ground loop, (some models already have a ground lift switch)
As for the "boiling" sound I also got a saw tooth wave sound (like a strange squeak or beep that changed frequency) this is caused by faulty components, and thanks to Frank Johnson (http://lug.demon.co.uk/kefrepair/?p=60) who suggested that 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)
Now my sub works as good as new, apparently these 3 capacitors can cause all kinds of problems it's a common fault, so if you are handy with a soldering iron, or know someone who is you could save yourself a lot of money by repairing you faulty KEF sub.
p.s. if you have ANY of the KEF PSW subwoofers they all have similar issues, you can find a guide to fixing them at the link above, Frank is a brilliant and very helpful man.
Posted on Aug 28, 2011
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