Question about KLH ASW12-200 Subwoofer

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Subwoofer no longer produce base sound

Please help. When plugged in the power cord, I saw green light on, but my KLH subwoofer has no base sound, just regular sound. I tested the speaker unit (the cone) and it is in good working condition. How to test the amp unit in the back to see what's wrong ? I did open it and touch the big black block and assume it should be warm with power on, but it wasn't. Could it be blowned ? and is ot easy to change it? Thanks in advance. Keivin

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  • MikeSch Mar 22, 2008

    My KLH ASW12-200 subwoofer doesn't woof anymore - How do I figure out what's wrong - I've tested all the cables and they're fine - the power light comes on but no sound comes out. Any suggestions?

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I dont get bas anymore. i hook up and get a hum type of noise. when i hook up at speaker level. it works, but it contains vice also.

Posted on Oct 15, 2008

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Master witch is blown. Also the frequency control swithe is probably gone. No replacement parts available. contact KLH at 818-767-2843

Posted on Jun 15, 2008

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Depends on your source and its amplifer complement. Some can drive a subwoofer directly while others just produce a Line Level subwoofer output for use by a separate amp feeding a subwoofer or self-amplified sub.

The set-up of the source to produce a subwoofer output is totally dependent on its design. Generally, you have to 1) tell it you have a sub, 2) define how bass will be routed or shared among your various speakers accordingto their bass-handling capacities, 3) using test tones, set the relative ludness and crossover settings so you have a uniform sound field.


To find a manual, maybe run it by the manufacturer

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http://www.fixya.com/support/t2753393-klh_subwoofer_about_6_yrs_old_keeps

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KLH ASW10-120 Subwoofer My KLH ASW10-120


Did you ever find a solution for this problem? I have the exact same thing happening with my KLH subwoofer and I'd love to know how to fix it!

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Here's how you hook them up:

- The left and right front channels from your receiver terminals should go to the terminals on the subwoofer marked 'From Amplifier'
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- Your center speaker is connected to your receiver terminals marked 'Center'
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That should get you up and running. If the bass isn't good enough with the passive subwoofer, you can get a decent powered subwoofer like the Velodyne VX-10 for about $150 and 'kick it up a notch'. Good luck and enjoy....

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