Question about Mackie SWA1501 Subwoofer

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My new SRM450 has an annoying Buzz in it.

I have owned many SM450 Active Speakers, and one of my new ones is now doing what one of my old ones did....a problem I never fixed,but was always annoying....especially now that it's happening on a brand new one.

At some point, the speaker started buzzing, and I Noticed that sometimes it didn't, so I marked it, and have since then discovered on about 50 different occasions, that when my speakers buzz, it's always that one, which tells me that something in the grounding wiring has come loose or something.

I've never taken one apart and would prefer not to, but my tech here in Cayman keeps telling me there's nothing wrong. Is there something I can tell him?

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I come across this quite a lot with the SRM450's and also the SWA1501's. One thing you can check yourself is by taking the amp off the back on the 1501 and checking/reseat the earth wires. Two of the earth wires are push on and the other is soldered. They all go to a screw/nut so make sure that is tight as well. Do you know when your kit was last PAT tested? It's always a good idea to get that done anually to make sure it's safe. If you need any parts then please do contact www.LondonSpeakerShop.com (if you're in the UK). Best Grant

Posted on Mar 24, 2009

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Mackie srm450 no output


Probably the internal fuse or the amp blown. If these are the MK1 they are notoriously unreliable and you can't even change the fuse without stripping the thing down. Sound OK when working but don't expect them to keep working if you want to drive them hard. I know of some people who have changed them to passive and put a crossover in them (I suppose it at least means you have a speaker but defeats the object of active) There are plenty of independents who fix these as they are so problematic but if you can get a pair of decent speakers. The MKII is supposed to be much better but still has some issues with reliability.

Jun 30, 2014 | Mackie SRM450 PA Speaker

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When I turn up the vol knob to max on the back of my srm450'sv1 they distort. Is that normal?


Pretty normal for almost any active speaker to distort at full volume, hope this helps.

Nov 22, 2012 | Mackie SRM-450 System

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ONLY GETTING MUFFLED SOUND FROM ONE OF MY MACKIE SRM V2 SPEAKERS,HAVE CHANGED DIAPHRAM BUT PROBLEM STILL THERE


If you've changed the tweeter and the sound is still muffled the fault is with the HF amp, or the cross-over. You will have to send the amp assembly for repair as it is all surface mount components in there -nothing you will be able to fix yourself. Sorry for the bad news!

May 04, 2011 | Mackie Srm450v2 Srm V2 Active Speaker...

1 Answer

I have Mackie SRM450v2 speakers, one has no power, I think the fuse has blown, it it possible for me to change this myself? The manual says it's not user serviceable.


Chances are if the fuse has blown, there are failed electronic components that caused the failure.

Here is a service manual that will be CLOSE to your unit, though not exact:

http://elektrotanya.com/mackie_srm450_active_speaker.rar/download.html

Scroll down to the "Get Manual" on the site and click on the link. The file is compressed. The first part is the schematic, the second the assembly and parts list. Likely the main low freq power amp has shorted transistors.

Apr 24, 2011 | Mackie Srm450v2 Srm V2 Active Speaker...

1 Answer

Hi I have a pair of Mackie SRM450s. When applying power I get a high pitch squeal whether I have speaker leads connected or not. After flicking the low cut or contour buttons on and off it then goes away....


Make sure you have ALL interconnected parts of the system powered from the SAME receptacle or power conditioning module. This MAY require you running an extension cord back from where your speakers plug in to supply power to the mixer. The ground bounce in power wiring in building can cause feedback or even destroying the sensitive input circuits of your system. As an electrical engineer I see these problems frequently. I think they should include this information with sound equipment user manuals, but they don't and people have trouble and damage their equipment. Doing this MAY also fix the problem you are having.

Apr 16, 2011 | Mackie SRM450 V2 Active DJ Powered Speaker...

1 Answer

I have Bose speakers, and one speaker (front left) just randomly started to do a very high pitched buzz when I turn on the radio, cd, ipod, or anything. Its very annoying. Is there a way to just disconnect...


Sounds like you blew that speaker. You can definately disconnect it but I'm certain you will not like the change to your soundstage. Meaning you wont like how the system sounds now.

Buy a factory replacement and just swap it out!

Jan 04, 2011 | Car Audio & Video

1 Answer

We use a mackie dfx 12 mixer and 2 mackie srm450 active speakers for a band situation the mics are sure sm58s we have to keep the levels of each cannel mixers quite high what are we doing wrong


Does the VU-meter (green/yellow/red strips of LEDs) on the mixer go all the way to the top when you adjust gain and slider level?
If yes, try boosting up the active speakers by adjusting the small volume button at the back of the speakers.
Also, make sure the equalizer (on the mixer) is set at 0 (the middle) for every slider (And not at -12). The 'voice cancellation' and 'break swich' should also both be unpressed.

Dec 13, 2009 | Mackie SRM-450 System

1 Answer

Annoying buzz on my speakers !!!


sounds like a ground issue. perhaps invest in an isolating 4 way 13 amp power cable as this will suppress any noise potentially being caused by other devices (such as lights) that may be on the same circuit as your audio hardware. failing that it could be that there is some damage to the cable you are using to connect your speakers to your computer. if they cannot be replaced you will need to have the connections serviced.

May 01, 2009 | Electronics - Others

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