Question about Bob Mackie SRM350 Main / Stereo Speaker

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I need to change a fuse in my Mackie SRM450 - Bob Mackie SRM350 Main / Stereo Speaker

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Blown fuse most likely. Fuse is a 250V 6.3A Slow-Blow. GMA T6.3L. Easy to get to and replace. Just had this happen on both my SRM 450s. Picked up fuses at Radio Shack for less than a buck a piece. I'd suggest pulling the blown fuse first to verify that thatis the problem and also to have it in hand when you go to buy new ones to make sure you're getting the right type and size. Hope this helps!

Posted on Aug 31, 2014

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The fuse on these is not a user serviceable item. write to Mackie Designs, Service Dept, 16220 Wood-Red Rd NE, Woddinville, WA 98072
Fuse is inline behind the triad AC cord jack.

Posted on Jul 24, 2009

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Posted on Jan 02, 2017

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SOURCE: mackie srm450 the tops on one speaker is not working

Hi There, This is quite a common problem with the Mackie SRM450's. You will find that you need to replace the diaphram on the top. This can be done by removing the 16 screws from the back of the Mackie (quite a long pain in the **** job) with a long handled cross head screw driver.

Once you have done this you should then remove the hex bolts from the back of the drive where the black and right terminals are. When this is done, pull off the cover and swap the diaphram out. With the new diaphram in place reverse the steps above but before you screw the back on, power it up carefully and check the sound is now working.

If the diaphram keeps going eg every 3 to 4 months then you will need to change the driver which is quite expensive to do. If you need spares and are based in the UK, contact LondonSpeakerShop.com who carry spare parts or can undertake the repair.

Hope this helps.

Posted on Mar 05, 2009

  • 1 Answer

SOURCE: Mackie SRM450 won't power on.

I am also getting the same problem. Complete power off. Was working like a dream. No given signs that this would cut off. Sent this for repair, the current quote is £160.00 for the amp module to be repaired. I was hoping to find somewhere that can supply, repair, or change for much less; considering that It is worth est £250.00 second hand!

Posted on Aug 07, 2009

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SOURCE: what kind of tool is needed to open mackie srm450

12" phillips screw driver total of 16 or 17 screws on back, then open like a **** its easy!

Posted on Nov 07, 2009

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SOURCE: I have dropped one of my mackie srm450 speakers

If the cone is damaged, it is possible to get it 're-coned'. If you can find a shop that does this type of speaker repair.

Otherwise, call around music stores (by that I mean places that sell musical instruments and PA gear) and see if they sell/sevice Mackie. If you are comfortable taking the old woofer out, just order the part and DIY.

It is not critical that the woofer is an exact replacement (doesn't have to be a Mackie speaker), the important things are:

1) it fits and screws back into the speaker cabinet
2) it is electrically similar to the original (same impedance 4 ohm or 8 ohm) and wattage rating

Posted on Feb 06, 2010

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1 Answer

Replace fuse on the SRM450


You just take out all the screws from the back and remove it carefully, there you'll find fuse near by the power plug.
Check amperage (I think it is 4Amp fuse) and replace it

Oct 20, 2014 | Mackie SRM-450 System

1 Answer

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

1 Answer

Mackie srm450 v2 no top end.


Check the aspect of the crossover filter for the speakers, inside. Sometimes they fry.

Apr 14, 2014 | Mackie SRM-450 System

1 Answer

Blown Mackie srm450 woofer makes sound but rattles when turned up


I need more information, but some similar event i remember with SRM450 and was the paper cone on the speaker, not visible from outside but inside was severely cracked all round, hope this helps.

Apr 23, 2012 | Mackie SRM-450 System

1 Answer

What size internal fuse on mackie srm450v2 speaker


Mackie say this is not a user service part. If the fuse has blown there is probably a fault in the unit being their reasoning. I know for certain they tend to blow for no apparent reason so it is worth giving it a go. They are 5 x 20 Slow or time fuses. 7A for 120V and 4A for 230V

Jul 13, 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

Repair a Mackie SRM 450 Speaker The Speaker is making a crackling sound while playing. The sound keeps cracking up.


You probably need to replace the diaphragm. The diaphragm is located behind the back cap. Simply remove the back cap, remove the diaphragm, clean the voice coil gap with a piece of masking tape, install a new replacement diaphragm, reinstall the back cap. That it!
You can see videos on how to replace diaphragm at this link.
http://www.soundspeakerrepair.com/speaker-parts-c/INST/Installation+Instructions
You can buy a new Mackie SRM450 diaphragm at this link.
http://www.soundspeakerrepair.com/speaker-parts-cp/SRM450-DIA/DIA-Mackie/Mackie/

Jul 20, 2009 | Music

1 Answer

Mackie srm450 the tops on one speaker is not working


Hi There, This is quite a common problem with the Mackie SRM450's. You will find that you need to replace the diaphram on the top. This can be done by removing the 16 screws from the back of the Mackie (quite a long pain in the **** job) with a long handled cross head screw driver.

Once you have done this you should then remove the hex bolts from the back of the drive where the black and right terminals are. When this is done, pull off the cover and swap the diaphram out. With the new diaphram in place reverse the steps above but before you screw the back on, power it up carefully and check the sound is now working.

If the diaphram keeps going eg every 3 to 4 months then you will need to change the driver which is quite expensive to do. If you need spares and are based in the UK, contact LondonSpeakerShop.com who carry spare parts or can undertake the repair.

Hope this helps.

Feb 22, 2009 | Mackie SWA1501 Subwoofer

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