Question about Mackie SWA1501 Subwoofer

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SWA1501 Sub blows fuses when turned on...

My sub wouldn't turn on at a recent gig, si I checked the fuse. Sure enough it was blown. I replaced the fuse(with the proper one) turned the unit on and it blown another fuse. What can cause this????

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  • 336 Answers

Shorted amp or blown speaker. Other things could also cause it. But there is a short circuit in it.

Posted on Mar 08, 2009

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Mackie sub swa 1501 no LED no output but light on board appears to be on


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Feb 18, 2012 | Mackie SWA1501 Subwoofer

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1501 sub will not power up. i opened, inpected and replaced power fuse 250v 6.3 amps replaced with same fuse and it blew as well immediately. what to do and how. I have some technical experience.


Isolate and look for possible shorted components.

Isolate the main power transformer from the board, and see if the

fuse still blow.

If it doesnt , then the rectifier and capacitors to the regulators.

But don't forget to check for possible shorted transistor

Sep 23, 2011 | Mackie SWA1501 Subwoofer

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Fuse blows, replaced the two capacitors and it still blows fuses... sub is fine and not blown...what else could it be??


If your sub is made to be used in other countries check to make sure it hasn't been switched to a different voltage.

Dec 18, 2009 | Polk Audio PSW202 Subwoofer

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Volume reduction with same input ( 4 years old),


What are you using to feed the sub? Are you sure that the signal level you are presenting to the sub is the same?

Dan

Jul 31, 2009 | Mackie SWA1501 Subwoofer

1 Answer

Fuse blows


Both 3 or 4 amp slow blow fuses are suitable replacements for the 3.125 amp subwoofer fuse.

It could be that the subwoofer is blowing the fuse because the one you installed was not slow blow.

But, more likely is the subwoofer has a short in the power supply which is causing the fuse to blow.

May 31, 2009 | JBL PB10 Subwoofer

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Bass pops


Hi There, Have you checked the 3 fuses that clip onto the main amp board? You can access them by undoing the two screws that are on the top and the bottom of the sub. They have flat large heads and you will need a hex key to unscrew them. If it is one of the fuses that has gone it will either be discoloured as in burnt or you will see the metal inside has split. Simply replace these with a new fuse and hey presto you should have eradicated the popping. If you need any parts for the sub or fuses then www.LondonSpeakerShop.com will be able to supply them (that is if you're in the UK). Hope this helps. Grant (from www.LondonSpeakerHire.com)

Feb 01, 2009 | Mackie SWA1501 Subwoofer

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Klipsch ksw subwoofer wont power on


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

Jan 16, 2009 | Gem Sound SUB-650M Speaker

3 Answers

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I reckon there is a good chance you've got a dodgy mains transformer, or perhaps a blown internal fuse. Sounds very much like the problem is on the AC input board.

May 22, 2008 | Mackie SWA1501 Subwoofer

1 Answer

Subwoofer


Repeated fuse blowing generally indicates a blown power supply, or blown output stages or both. One thing to do is be sure that you have replaced the fuse with the correct type. A T stamped into the metal of the fuse near the rating, indicates sloblo or Time Lag fuse. A fast blo fuse, may work once, or more times, but will never replace a sloblo fuse in this type if unit. Good Luck, hope this info helps, don't hesitate to hit me back here for more help :)

regards
Graeme

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Do you get sound from your other speakers? If so, then the sub is either blown or not connected correctly. I would suggest checking all the connections.

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