20 Most Recent KLH ASW10-120 Subwoofer Questions & Answers


Hello
It will be very difficult to get its printed circuit board as it is. You can buy a populated board to your KLH from Ebay. Just search in with its part number.

KLH ASW10-120... | Answered on Oct 16, 2018


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.

KLH ASW10-120... | Answered on Jan 19, 2018


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

KLH ASW10-120... | Answered on Oct 29, 2016


If the sound is more of a low hum than a buzz, you probably have bad capacitors in the power supply...Time to take it to a shop.

KLH ASW10-120... | Answered on May 14, 2016


It's very likely that lightning has damaged the internal parts of the speaker. You may be able to get it fixed, but it may cost more than the sub is worth.

KLH ASW10-120... | Answered on Oct 19, 2015


I would fit the same type, unless the schematic shows a change, which clearly it doesn't. However I would be surprised if R42 burnt up alone! Look at the schematic, is R42 linked to any other transistor or part? If so check them if you can.
By the way is R42 a fuseable resistor, for example is the symbol on the schematic or on PC board different to most other resistors?

KLH ASW10-120... | Answered on Mar 16, 2015


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

KLH ASW10-120... | Answered on Jan 18, 2015


There is a small plastic plug just above the power cord. Remove it to find the fuse.
http://product-images.highwire.com/4442801/6385-5.jpg

KLH ASW10-120... | Answered on Jan 07, 2015


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


KLH ASW10-120... | Answered on Oct 19, 2014


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


KLH ASW10-120... | Answered on Jul 15, 2013

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