Question about Mackie SWA1801 Subwoofer

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The power has just gone off on my swa1801

It was working and then not!

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Both my 1801s gone over xmas..fuse at bottom of board popped when swiched on, replaced fuse but no sound now although LEDs are on?


Fuses blow because of an overload. In this case it will be a shorted semi-conductor. Most likely in the main amp section. Maybe the main amp itself. It might be attached to a heatsink.

Jan 24, 2013 | Mackie SWA1801 Subwoofer

1 Answer

Hi. I have problems with my SWA1801. When I try to start the amp, the Thermal light goes on. Even if the amp is cold ! What can it be? I have turned down the gain on the back and have good cables to the...


Power it ON, without anything connected to the input.

If it powers On without the thermal light, then rejoice,

If it powers On with the thermal light it means something...

Oct 23, 2012 | Mackie SWA1801 Subwoofer

1 Answer

Components Q12 & Q13 (2N 3906) PNP transistors fried. Would there be anything else blown?


It is sad your having a problem with Q12 and Q13, check the regulator

that supply voltage on the transistor 's your referring to.


Q13= 2SA1478 for Mackie SWA1501 Active Subwoofer

the supply is about +15V and -15V

Aug 20, 2012 | Mackie SWA1801 Subwoofer

1 Answer

Model swa 1801 Fuse 240V 4A burned out ! I replaced it but still get no power (any led stay off) What can it be ?


check for integrity of the main amp and the torroidal transformer.

here is a guide , how to check for transistor

if there is a continuity on the primary terminal of the transformer.

Have a tech to guide you , should you need to DIY.

Sep 17, 2011 | Mackie SWA1801 Subwoofer

1 Answer

No power


There are about 6 fuses on the inside. check them but the amp is probably blown

May 26, 2011 | Mackie SWA1801 Subwoofer

1 Answer

The thermal light comes on on my swa1801 and lose all audio what could be causing this to happen?


make sure its plugged into a large circuit over 30AMP! Turn down the gain on the back. They can't take too much punishment so turn the bass down on the eq. Get a stronger sub

Jul 01, 2010 | Mackie SWA1801 Subwoofer

1 Answer

How do you get to the ac fuse on the SWA1801 ?


There are 4 allen-head screws that hold the amplifier assembly in - two on top and two on bottom. Remove these and the entire thing slides out the back. There is one fuse near the power switch and two on the power supply board inside. Be sure to use the correct value.

May 13, 2010 | Mackie SWA1801 Subwoofer

10 Answers

Mackie SWA1801 NO POWER, NOT TURNING ON


  1. I have blown capacitor in my mackie swa1801, Can you send me schematic g_man001@hotmail.com thanks Georgie.

Feb 24, 2008 | Mackie SWA1801 Subwoofer

4 Answers

MACKIE SWA1801--Sound quality is not same


I suggest, go out and buy a heavier duty 18 and replace it.

Aug 24, 2007 | Mackie SWA1801 Subwoofer

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