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KLH GFX550 125 watt Powered Woofer. Looking for a schematic

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Http://antiqueradio.org/art/KLHModelEightInstructionManual.pdf
This might help you
Sir John Dana taylor

Posted on Apr 23, 2017

  • JERRY A LAUFER
    JERRY A LAUFER Apr 23, 2017

    Thanks for the response Dana but your link gives me the KLH Model Eight FM tuner instruction manual. My device is the KLH GFX550 Subwoofer. I have a Owners Manual that tells me how to use it. My device is not working and I want to repair it. I need a schematic to save time. Otherwise I must trace the printed circuit boards and create a schematic and I don't know if I want to invest the time.
    You can download the GFX550 OM here -https://www.dropbox.com/s/bqr689il4liw77...

  • Dana Taylor Apr 24, 2017

    http://audio.manualsonline.com/support/k...
    this has a series of manuals
    Cheers
    Dana

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2 Answers

Trying to hook up a KLH sub woofer, S100ETH, PSW8-100 to a VCR reciever. Reciever has sub woofer connection but does not works on the KLH sub woofer. What is the problem ?


I suggest you go over your receiver set-up instructions. See if you need to set the receiver to acknolwedge the addition of the subwoofer. It should be in your receiver set-up steps. Just as a check, hook up one of your other speakers to the subwoofer lead to see if gets audio signal. I'm guessing the issue is your receiver settings.

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Schematic Diagrams for KLH ASW10-120


After acquiring a fried KLH ASW10-120, I write to the tech folks at KLH and they sent me the upper and lower board schematics. I asked if I could publish them online, and explicitly asked if I could share them on FixYa.com, and they gave me permission to do just that.


Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board

on Sep 25, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Klh powered sub woofer


Low level inputs are designed to take signals directly from an amplifier's "sub out" connections. That way the KLH amplifier will use those signals to produce sound and the volume can be balanced between the main amplifier and the sub amplifier using the sub's volume controls. Depending on your amplifier and sub, that is the best way to connect them. However, be careful running the RCA cables since the low levels are more subject to interference. Keep the runs as short as possible and use high quality shielded cables for the interconnects.

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1 Answer

Why cant you find a simple circuit board when i have all the numbers and parts information! Its a R&D by CJH #02-01633-01 can you help?


Other than its a power board for a KLM 10" powered subwoofer board I can't really help you. I have been looking for a schematic for it for months. I am looking for were the black wire connects from the selector board to the power board. I guess a photo of it would work for me, it connects the base of q1 to the other board.

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I have a klh 116615p bg11 12 sub and need to know the watagew it doesnt say


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3 Answers

Sub woofer produces a very loud low tone


This model has a high failure rate with the power supply board. Typically, power resistors fail, which in turn burns out the big capacitors.

I have not heard of transformers failing though, so it shouldn't be too much to repair it.

Here are the schematics for the unit: Upper board and Lower board

Dec 31, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Hum no audio output


There are a lot of folks who've had power supply issues with this sub. Typically, the large resistors fail, which takes out the capacitors.

If you know how to read schematics and replace parts, then these might be helpful to you:

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board

Dec 22, 2009 | KLH ASW10-120 Subwoofer

1 Answer

Klh powered subwoofer keeps blowing fuses?


then the circuits took a hit and the fuse didn't do it's job in the 1st place. best is too get new circuit thats inside the sub woofer.

sorry to be the bearer of bad news

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1 Answer

Info


I wrote to KLH and they sent me the schematics for the upper and lower boards. I asked if I could share them, and they gave me permission to post them for use here.

Have fun!


KLH ASW 10-120 subwoofer schematic - lower board

KLH ASW 10-120 subwoofer schematic - upper board


Mar 10, 2008 | KLH ASW10-120 Subwoofer

6 Answers

KLH ASW10-120B subwoofer


I realize that this is an old problem, but folks are still finding it on searches, so here goes.

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
KLH ASW 10-120 subwoofer schematic - lower board


Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board


Jan 25, 2008 | KLH ASW10-120 Subwoofer

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