Question about Kenwood SW-38HT Subwoofer

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Power Light off & speaker not working

Is there a fuse located somewhere that may be blown? The power outlet I am plugged into works but speaker does not. Turning power switch on speaker of & on does not help.

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Re: Power Light off & speaker not working

I had the same problem. The screws around the perimeter of the back plate must be unscrewed and the plate must be pried off as it is glued to the box. When replacing my fuse, 2A 5x20 GMA, it blew the fuse again. Disconnecting the second circuit board prevented the next fuse from blowing, but now the question is what is wrong with the circuit board? I cannot see any damage or shorts.

Posted on Feb 22, 2008

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Re: Power Light off & speaker not working

Yes, most likely there is a fuse that has blown, but most of the time a fuse does not blow for no good reason. There is probably a short in the woofer output amp that has blown the fuse. Good Luck

Posted on Oct 11, 2007

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There is probably an internal fuse which you can check with the amp unplugged (unbolt the amp from the woofer, noting all gaskets.) If it's blown, it could have fatigued so just replacing it would fix it, or it may have blown because the amp or power supply failed. If that is the case, a new fuse will blow immediately. I can fix it for you if it has a blown amp or supply. Contact me at

May 13, 2014 | Polk Audio Speakers & Subwoofers

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Hello i have a s master digital amplifier model number SA-WSF200. Suddenly the right speaker a subwoofer stoped working. I tried plugging the right speaker into the left speaker output on the amp and it...

i dont know if amp has fuse for each channel, but they would be easy to see.. otherwise that baby has a blown component or two on a pc board, maybe an output power transistor of capacitor failed.
Last time i went to a shop it was like $100 plus parts for a similar repair.
I recomend sending Sony support an email and see what they say before you take it anywhere as well..

Dec 04, 2013 | Speakers & Subwoofers

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I believe the unit has a blown fuse, but I cant locate it?


If the fuse is blown, then you can locate the fuses at the power stage of the power supply, trace the LIVE terminal on the you see a link that connect the fuse and the LIVE terminal of the power source, most of the fuse are easily detached, because they have a fuse holder, but some are resistor like in appearance, it is always solder to the panel board, which make it difficult for people to know that is a fuse, but as a technician they will know.

Hope this will help in solving the problem...

Aug 05, 2011 | Velodyne DLS4000R Subwoofer Speaker

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The sub on the left speaker don t play and the light went off but the mid and tweeter have sound coming out

The amplifier that drives the built in subwoofer has stopped working. The first thing to do is check that the power cord is plugged in to a live power outlet. Next, replace the fuse which you'll find on the large black metal plate on the back of the speaker. Use only the size and type fuse specified. If that does not work contact Definitive customer service at (800) 228-7148.

Apr 02, 2011 | Definitive BP7006 Main / Stereo Speaker

1 Answer

Can`t power it up. Connections and fuse OK. Stopped working after switching off and would never switch back on. LED indicator light`s neither green nor red but simply off.

First, I have to commend you for having a really fine piece of equipment. Mission makes great products. Now down to business. Being where I am and not being next to your sub-woofer with test instruments and tools I'm going to be so basic as to almost be insulting. However, If I were there, I would be testing these things.
Normally, when one has a catastrophic failure. i.e. no power, and no indication of power present one starts with the power supply. And that starts at the power company.
1st Determine if there is power in the actual outlet that the unit is plugged into. I have found that when installing a sub-woofer on a two plug wall outlet, for example, it might be plugged into a plug intended for a floor lamp. and is turned on and off by a wall switch. Many residences have this feature. It is usually one of the two plugs in an outlet. So you have to test the actual physical outlet. If the outlet is off, check the light switches. If there is no power to the outlet, check the household circuit breaker.
Let's assume that everything works, so far.
The next thing to do is check the internal fuse with a meter. If you don't have one, pick up a multimeter from Radio Shack or Walmart for less than $20.00 or Harbor Freight for less than $7.00
If the fuse looks good but checks out bad (sometime happens) replace it with A FUSE OF THE SAME VALUE. DON'T STICK IN A PIECE OF ALUMINUM FOIL OR BYPASS THE FUNCTION AND PURPOSE OF THE FUSE. The fuse costs a dollar, at the most, the Sub-Woofer costs $800.00 at the most.
OK, so now you have either a working sub-woofer, or an elegant paper weight.
If it is still being a paper weight, contact mission to locate an authorized service company. This piece of equipment in not designed to be user servicable
Here is their link below,
I hope this helps,
Best Regards,

Jan 20, 2011 | Mission M5AS Subwoofer

1 Answer

It will not power on

Your sub should turn on into standby mode when plugged into AC power without being attached to the receiver. If it does not follow the list below. If it does, the sub needs a signal from your receiver via either by line-level (RCA) or the speaker wires to turn on out of standby. Ensure that the cable or wires going to your sub is in fact sending a signal while the receiver is on. To Test, (speaker wires) hook up a different known working speaker; (line-level) Some receivers have a menu option to turn the LFE output on and off, ensure that it is on and producing a signal.

Diagnose the problem:
1) Remove all wiring to/from the unit except for the AC plug (use a different known working AC outlet), will it turn on? If so the other outlet is not working.
2) Remove the woofer, does the amp have a fuse that need to be changed? Change the fuse. If it blows again after replacing and turning back on, the speaker is blown; go to #4.
3) Unplug the woofer from the amp, does it turn on? If so, go to #4.
4) The sub need to be serviced.

-Hope this helps, Chris.

Aug 29, 2010 | JBL PSW-D112 Speaker

1 Answer

The mini fuse(2A/240v) keeps on blowing up on the power supply port, what could be the problem

You can tell a lot from what the blown fuse looks like. If it's all black or even shattered, it's likely a short circuit somewhere. If it's just blown, then you have an overload.
Another way to find out is by figuring out when the fuse usually blows. If it blows when it's tapped, shaked or moved then you have a loose wire that's touching somewhere it shouldn't.
If it blows when you turn it up high, it might just not be able to handle that much power. Remember to ALWAYS turn down amplifiers when you hear noticeable distortion. Or, the sound pressure from the speaker might be jostling things inside the cabinet.
If it blows when you plug it in/ turn it on/ start using it you've got an electrical problem, not a mechanical one. You'll need to get the multimeter and start tracing faults.

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The power supply switching transistors are likely fried. Dangerous high voltages involved. I would remove the plate and send it to Klipsch for repair.

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Usually there is a fuse plug next to the power input. Check to see that the fuse is not blown. If it isnt call the guy, he is legally responsible for any work he performs.

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