Question about Mackie Thump Series TH-12A 12" Two-Way Compact Powered SR Speaker -

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I have a pair of Mackie Th-12A speakers and one of the speakers gets noisy buzz after heating up. If I turn of and switch the plug to another electric socket it quits but, the noise comes on again, shortly. Suggestion as to the cause?

Posted by Anonymous on

3 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

mrwtech
  • 59 Answers

SOURCE: SRM 450 Mackie

1)Clean the heat sinks on the amp on the back of the speaker,
2) carefully remove the amp from the rear of the cabinet and look for 'crispy critters' on the circuit board. If you see 'um, either take the amp to a service center, or go to your dealer and get him to order you a new one.
3) if you're goin' thermal, either get higher powered speakers, or tune it back a bit with these. I have a set that has run years in a dance room with no problems. If you are stretching the system to cover a bigger audience, think about another pair.

Posted on Dec 05, 2008

Grubhead
  • 5017 Answers

SOURCE: mackie 450 , crackling even

I think the fault is in the power amp section, since it's not affected by the volume control. If this is a stereo amp and it's accross both channels then it must be a part that is connected to both. Such as a Power Amp IC. However if mono probably a transistor on the heat sink.

Posted on Jul 04, 2011

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1 Answer

Hi there, my relatively new Mackie Thump wont power up despite being plugged in / on etc. When I do with it on all i hear is a very low pop sound every 5 to 10 seconds or so


Your best bet is to contact Mackie Tech Support. Here is a link to their Suppot page. Mackie Tech Support
it's likely it needs to go to a repair shop. Here is a link to their service center finder. Mackie Service Center Locater

Feb 05, 2015 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

Mackie thump 15 a over load light stays on when powerd not even sending a signal to them.


There's a problem with the amplifier transistors or other heat generating circuit. That's what triggers the overload light.

Sep 11, 2014 | Mackie Thump 15 TH-15A Powered Speaker

2 Answers

No sound coming out of my mackie


Whether you are experienced in electronics repair?
if not, try this simply way:
1: Test whether the power amplifier is still working. See figure 1.
Power OFF,adjust the EQ settings as shown in the picture.
Minimize LEVEL.Switch ON Power. Touch pin 3 at the INPUT socket by using a small screwdriver or piece of wire / cable.
Slowly raise the LEVEL,a little bit only (as the clock showed 7-8) until
sound is heard in speaker. If not heard, slowly raise again LEVEL.
If audio input signal is heard,it can simply be taken to mean
that the amplifier is working.
If LEVEL at 9 o'clock position,and the audio is not heard,
the possibility of the amplifier is damaged.
Switch OFF the power. Take it to a repair place.
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2: When the Power LED is lit, but no sound,
There are many possible causes, one of which is:
I have been getting 3 times similar cases, and all are caused by
two Rectifier-Diode (either or both.) damage on the power-supply-unit.
Remove/desolder,measure, if damaged replace it with a new one.
See figure 2-3.
eebe24b3-1cd5-4fba-b883-6ec7daa01b8f.jpg

83a7ac9f-dec0-4f86-8152-b570c34143cd.jpg

Hope it helps. Regards.

...............

May 13, 2014 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

How to replacea bass driver in mackie thump 15a


"How to replace bass driver in mackie thump 15a".
Did you mean,disassembly the speaker enclosure?
Just remove the 16 screws at the rear cabinet, using a screwdriver.
Then remove the 4 screws that secure the speaker, using the hex key. Is the bass driver blown up / broke?

Jan 28, 2014 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

I had Mackie th15a 110vac and it had busted fuse, when i replace it when a new one it got busted again...i plug the power cable to 110vac without a regulator. what would be the problem in the power...


Almost certainly the amp has failed, as per usual with these, you need to take it to the repair shop and see if it's worth fixing it then sell it once working or for spares if not. Sadly whilst Mackie make some really good kit their powered speakers are not amongst the most reliable

Dec 26, 2013 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

My Mackie 450 turns itself off why


Be aware that TIMED TURNOFF button at the back of the speaker is off otherwise every time sound level is low the speaker can go off by itself.

Dec 16, 2012 | Mackie SRM-450 System

1 Answer

Have a low noise like hum when i turn on thump 15A It doesn t change by moving level but when I plug in anything it s feeding a noisy tale on every signal attack.


Make sure you are using BALANCED audio line to the speaker AND your mixer is powered from the SAME receptacle as this speaker. One MAY have to run an extension cord back to the mixer and othe equipment, but this must be done to reduce noise and also for equipment safety. Multiple recepatacles in a building have grounding issues that can generate noise or worse damage equipment due to ground loops. If you DJ mixer does NOT have balanced outputs, use DI boxes so you can use balanced lines to your speakers. Your cables will either be XLR or 1/4 inch TRS types, not just TS type.

May 14, 2011 | Mackie TH-15A Active DJ Powered THUMP...

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