Question about Mackie SRM350V2 POWERED SPEAKER

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Speaker turns on and off continually, while the power and limit LED blink at the same time.

I'm just looking to know the cause of and solution to this issue, if possible. I'd imagine some sort of diagnostics would need to be carried out but just in case it may be a minor issue I could look at myself, I thought I'd ask. I've tried a different power lead and power source but that's all so far. Thank You! J

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I would reccommend opening it up and taking a look inside. It should be easy to work out how to open it up. Once opened, check for any signs of damage or burning around the power supply unit. To find out what all of this means, simply search up what you're having trouble with on YouTube. Check to see if any of the capacitors are damaged. However, The most common reason for your problem would be damaged soldering, cracked soldering, or a weak solder connection. If you ?nkw anyone (friends or family) that are good at electronics and soldering etc, be sure to ask them to check it out too

Posted on Jan 02, 2016

Testimonial: "Hi Jack. Thanks for responding. Since posting this, I managed to open the unit and have a look around. Unfortunately, there's nothing obvious. That said, the board is pretty compact and has multiple laters, so it would be easy for me to miss something as I'm not completely clued in with electronics - however I have a very basic understanding of what's happening on some of the board. It would seem that these units aren't very reliable at all. Any further help would be much appreciated. Thanks"

  • Jonathan Delaney
    Jonathan Delaney Jan 04, 2016

    Hi Jack. Thanks for responding. Since posting this, I managed to open the unit and have a look around. Unfortunately, there's nothing obvious. That said, the board is pretty compact and has multiple laters, so it would be easy for me to miss something as I'm not completely clued in with electronics - however I have a very basic understanding of what's happening on some of the board. It would seem that these units aren't very reliable at all. Any further help would be much appreciated. Thanks"



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There are so many problems that could possibly happen when you go live with an event, I couldn't possibly list them all!
In fact, I keep finding new things that can go wrong every time I set up an event!
But all is not lost! In fact, it's just the nature of dealing with a lot of people and live event ---- anything could happen!
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This the classic -- we've all heard it - and it can be a monster.---- you NEED to understand how to place speakers properly, how the system works in general, and how to set volumes.
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Howl and echo

Sometimes instead of a high pitched, full fledged feedback, you get a howling or echo sound that changes as things move around. When you touch the microphone it stops. Let go and it starts again. Move a little to the left and it's not so bad ... You can dance around all you want, but what you have is a problem. And this is a problem that can be impossible to fix once the event is underway. This is why we test before the audience arrives.
What causes the howling and echoing is the same thing that causes feedback - what you have is sort of "baby feedback" - it hasn't grown into full feedback yet. And it's correct for you to be concerned. Turn one thing up a tiny bit and the whole room will be overcome by a deafening squeal.
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What about if the echo isn't the beginnings of feedback? Well, there's the possibility that the system may have some effects, like echo, that are built in. There might be a section called "effects" - and echo is selected and turned up. It's important that someone needs to understand the basic system and be in charge of it. That will solve this problem.

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First thing I would think is, it's a bad cable, probably a bad microphone cable. Especially if its a portable system. Be sure to take care of the microphone cables. In the industry we use the terms "known good." For example, I will always carry with me a cable that I know is good. If I need to troubleshoot, I swap the "known good" cable for one I suspect isn't working. Mic cables will just stop working sometimes. And then there's no time to fix it - you need a spare. Also, make sure to either dispose of the bad cable, or mark it - don't let it show up again in your setup!

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If you're setting up a portable system, keep the cabling safe and and as neat as possible. When something goes wrong it'll be easier to figure out, and make sure you tape the cables down so that people don't trip over them.

Use sturdy, well made speaker stands in portable systems

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Watch out for dimmers that control lights - turn them off if you have buzzing sounds

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