Question about KEF Audio PSW 3000 Subwoofer

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I'm looking for a KEF PSW 3000 manual download

The speaker rattles while on , even with no signal being sent , and when I do send signal it rattles more.

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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

Posted on Dec 27, 2008

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My Kef Subwoofer model PSW 1000.2 is not producing any output, before all this I got a constant noise from it and now there's no noise at all even though all the settings on my amplifier (Sony...


Hi,
First of all you need the service manual for the same. That i have with me. If you can sent your email id through fixya will sent the same to you. Just read the service manual and watch the circuit diagrams. There are different voltage measurement points.You have to check the power supply first. It will be very easy to both of us if you also have the service manual. if so i can assist you in the Wright way. It is not possible to set the service manual through fixya because its a large pdf file.
ok

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My KEF (PSW 2150) ruffer speaker buzzes even with no input connection?


Your amplifier is bad. I sent mine to KEF in NY and they fixed it for $100 US.

Dec 08, 2010 | KEF Audio PSW 2150 Speaker

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Hello ! I'm not sure how to connect my kef psw 2500 sub to my yamaha amp. I've got a subwoofer out on my amp but there's 4 inputs on the sub and I don't no which one to use ! Please help as getting...


Just for clarity, I need to explain what the four inputs are on the KEF subwoofer. There is a left and right RCA input which is the input signal to the subwoofer and there is a left and right RCA output which is the High Pass output from the subwoofer.

On the back of the Yamaha receiver, you said you have a subwoofer output. This output is most likely the mono subwoofer part of the home theater system and can be used if you like. The left right signal input into the KEF is summed into mono so if you only connect one channel you will basically reduce the signal level by 1/2 (-3dB) but it will work fine.

Alternatively, if your Yamaha receiver has monitor out and monitor in, you can run the monitor output signals to the subwoofer and you can then run the high pass outputs from the subwoofer back to the monitor in. This will give you the subwoofer and provide a smoother signal matching with your audio system.

It is not always easy to connect the subwoofer up to an integrated receiver/home cinema system using the high pass channels of the subwoofer as you don't always have access to the analog output and input of the front channels. In this case, just use the Subwoofer output or just the monitor out only.

I hope this solution is helpful.

Dec 03, 2010 | KEF Audio PSW 2500 Subwoofer

4 Answers

I have a Kef PSW 2500 that emits a loud buzz when on. I pulled the amp, but I'm not sure if its the speaker or amp. What should I be looking for the speaker outputs from the AMP? How can I tell if its a...


Have just repaired a similar problem with a KEF 2500 - relay was chattering at 50 Hz rate, buzz in speaker output.

Problem was caused by overheated / dried out Electrolytic filter cap (C52 - 47uF 63V) on the relay coil supply feed.
The overheating is caused by adjacent power supply dropping resistors which run very hot due poor design of power supply.

A service manual for a similar model is available at following link, refer to power supply section:-
http://www.eserviceinfo.com/downloadsm/35375/kef_psw2000.html

To replace,
1) remove chassis from speaker cabinet (8 screws), disconnect red/black speaker wires from main PCB spade connectors.
2) Remove 4 screws attaching main pcb heatsink assembly from face panel - lift assembly from faceplate (a bit messy , much heartsink compound between mounting faces)
3) unplug the AC 3 pin connections adjacent to the large capacitors and the 3pin connector on end of pcb (near C52), then roll assembly over the top of the audio sub-board to access underside of pcb.
4) solder connections to C52 is accessible at edge of board without further dis-assembly.
Take extreme care replacing C52, as the circuit board is of poor quality, (usual domestic electronics quality) being single sided copper without plated through holes.
The board is already heat damaged by heat buildup from power supply resistors, so the track will most likely lift and crack when disturbed- to counter this problem link the +ve capacitor pigtail to an adjacent solder pad on the same track.
Assembly is reverse of above, take care to preserve/ensure minimum disturbance of heatsink compound.

Nov 29, 2009 | KEF Audio PSW 2500 Subwoofer

1 Answer

Loud buzzing from Kef PSW1000 Subwoofer


yes. A good idea. Kill power to the sub, then unplug and remove everything from the sub. go ahead and plug it in again and check for buzzzz.
That is test one. if you have buzz still, its the sub assembly. bad luck, but not impossible. If the buzz is gone its one of the signals to the sub. They can produce a buzzz without any signal coming from your stereo equipment. Replace the feed line, enjoy! BTW...Kef sure does sound clean. good choice.

Nov 09, 2009 | KEF Audio PSW 1000 Subwoofer

2 Answers

I have a KEF KHT 2005.2 Subwoofer that does not produce sound any more, it makes a slight pop sound when i switch it on and thats it, no further sound. The system is about 5 years old but has not had a lot...


The KEF-Subwoofer range (from the PSW1000 up to PSW 3000?) have some built-in flaws in the electronic design.

I just fixed my PSW2000 working along the repairing instructions from:

http://lug.demon.co.uk/kefrepair/

Works! Costs have been about 35,- Euro for spare parts and some (too many) hours of work. If you are used to electronics and soldering you may make it in 2 hours.

Nov 07, 2009 | KEF Audio KHT 2005.2 System

1 Answer

Psw 3000 sub


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

Aug 11, 2008 | KEF Audio PSW 3000 Subwoofer

1 Answer

Subwoofer clicking noise


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

Mar 04, 2008 | KEF Audio PSW 3000 Subwoofer

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