Question about KEF Audio PSW 2500 Subwoofer

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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 frustrated thanks

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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.

Posted on Feb 27, 2015

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Anonymous

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SOURCE: KEF Subwoofer AV1 and KEF Activator. Need specifications

Unit is now 12 years old min. and no longer state of the art.... i offer $400

Posted on Jan 28, 2009

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Anonymous

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SOURCE: I just bought a KEF PSW2500 subwoofer and am

HI,go into the yam setup menu and make sure you have the sub turned on and cross over set to about 80hrtz if this suits your speakers,set sub level to about -5 on amp and say half way on the sub,this should work if not pull out sub cable at amp and touch the end,you should get a hum,if not you may have no power,faulty cable or sub.
PS>make sure you are pluged into the sub PRE OUT and NOT the six channel in.
Hope this helps.
CABLE GUY.

Posted on Apr 20, 2009

John Bloomfield

  • 534 Answers

SOURCE: I have a Kef PSW 2500 that emits a loud buzz when

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.

Posted on Apr 28, 2010

dunnbiker

David Dunn

  • 8546 Answers

SOURCE: im having trouble with connections from kef psw

Have you got the sub defined to the Onkyo correctly? Try conencting the sub's input to one of the Tape Out connectors and play some FM through it. That will prove if the sub is alive. The nwe can troubleshoot the correct failing device.

Posted on May 03, 2010

sreeves3

  • 2 Answers

SOURCE: my kef psw 2150 sub

is probably faulty capacitors
you should check out this link: http://lug.demon.co.uk/kefrepair/?cat=1

Posted on Dec 05, 2010

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1 Answer

I have a Yamaha HTR 3063 reciever and I just got a PSW 2000 Kef sub and I can't get the sub to WORK NO MATTER WHAT I DO PLEASE HELP


That is a potentially great combination. I have a Yamaha receiver but I am not familiar enough with Kef to know but is it possible your receiver expects to be connected to a powered sub. Are you sure the Kef works by itself? Have you checked to see whether the receiver subwoofer output works with another speaker? Could receiver mode selection be a factor? My Yamaha switches various functions on and off depending upon your preference.

For what it's worth, the troubleshooting section of my Yamaha manual says a subwoofer no sound problem can be caused by selecting MAIN LFE/BASS OUT on the SET MENU when Dolby or DTS material is being played or selecting SWFR when a 2-channel source is being played. Something has to work!

Sep 10, 2012 | Audio Players & Recorders

Tip

KEF PSW 2500 Relay buzzing and audio output buzz


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.

A user tip- don't leave unit switched on when not in use- heat buildup will eventualy cause it to fail due dried out electrolytic capacitors.
Poor power supply design is the main source of the standing heat buildup.

on Apr 28, 2010 | KEF Audio PSW 2500 Subwoofer

1 Answer

Im having trouble with connections from kef psw 1000 sub to onkyo tx sr506 amp. sub is making a bit of a humming noise but not getting any proper sound through. dont know what im doing wrong. can anyone...


Have you got the sub defined to the Onkyo correctly? Try conencting the sub's input to one of the Tape Out connectors and play some FM through it. That will prove if the sub is alive. The nwe can troubleshoot the correct failing device.

May 03, 2010 | KEF Audio PSW 1000 Subwoofer

1 Answer

OVERLOAD


First of all the KEF is a powered sub which means that it wants a line level signal NOT a speaker level. Send the signal from a tape output or pre-amp output to the sub input. The overload is because the impedence load for the speaker output is too low and looks like a short to the amp. Continued attempts to connect the system as described will result in damage to the output section of the amp.

Please let me know if you need more info.

Dan

Feb 03, 2010 | Technics SA-DX750 Receiver

1 Answer

Can you please tell me how to connect my kef psw


If your amp has a "sub out" jack, that's the best way to hook up this sub. You'll just need a single RCA (also called "phono") cable. Connect it to the Left input on the sub, which should also be marked as "mono"

If your amp just has speaker-level outputs, then connect the left and right main speakers from your amp to the sub's high-level inputs, and then run wires from the sub's high-level outputs to your speakers.

If you're running a surround-sound setup, use the front-left and front-right speakers for this hookup.


If this helps, be sure to hit the "thumbs-up" button for me!
If not, post back with the "Add comment" and I'll do my best to answer any questions you've got.

Jan 23, 2010 | Panasonic Audio Players & Recorders

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

1 Answer

HUM noise at PSW3000 if i connect the Yamaha RX-V995


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

Nov 06, 2009 | KEF Audio PSW 3000 Subwoofer

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I thinking of bying this Sub, but I have an old Yamaha RX-V660 receiver. Can I conect the Sub to that receiver and how?


Not very easily. Your receiver has no Sub Output. You really want a sub that supports hi-level inputs such as this: http://www.parts-express.com/pe/showdetl.cfm?Partnumber=300-633
Then you can run your front speakers through the sub.
The Kef site hints it may be possible to run high-level inputs to that sub by using RCA adapters.

Aug 27, 2009 | KEF Audio PSW 1000 Subwoofer

1 Answer

I just bought a KEF PSW2500 subwoofer and am trying to connect it to a Yamaha v663 receiver. However, I went from a subwoofer pre-out 1 to the right line in on the sub. I don't hear any sounds from the...


HI,go into the yam setup menu and make sure you have the sub turned on and cross over set to about 80hrtz if this suits your speakers,set sub level to about -5 on amp and say half way on the sub,this should work if not pull out sub cable at amp and touch the end,you should get a hum,if not you may have no power,faulty cable or sub.
PS>make sure you are pluged into the sub PRE OUT and NOT the six channel in.
Hope this helps.
CABLE GUY.

Apr 19, 2009 | KEF Audio PSW 2500 Subwoofer

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