Question about Mackie SRM-450 System

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I own a pair of mackie srm450 powered speakers, currently im in iraq where the power is 220. the speakers were plugged into 220v and they are rated at 100v. is this a easy repair and if so where can i find inforamtion to do the repair at or is this a hard prepair that will take an expret to do. can you discribe the repair process.

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  • Anonymous Dec 28, 2008

    ahhh yeah.... I own more then one but the guy didnt they were 110V, any helpful soultions out there?

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You'll need to get a power adaptor, that's about all you can do.

Posted on Dec 27, 2008

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1 Answer

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You just take out all the screws from the back and remove it carefully, there you'll find fuse near by the power plug.
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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.

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I just bought a computer speaker but it's 110v and my computer is 220v. can i plug the speaker to the computer without damaging the speakers?


Hi ,
If it says it needs a AC 110V connection , you will fry at least the sub . Don't do it ! Connect the device to an AC 220 / 110 V transformer you can find on the net or in all specialized retail shops .
Best regards

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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/

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2 Answers

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!

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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.

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