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Mackie thump powered speaker. Traced AC to rectifier, no Dc at out put ,nouthing,? Power rectifier replace but look at regulators as source?

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These must be one of the most fault prone speakers ever made. Disconnect the power supply from the amp and see if you can get it working then connect it back up but don't hold your breath, they regularly fail taking out the output stage which in turn takes out the PSU so check the amp with a limited and robust PSU or use a variac on the mains to test.

Posted on Apr 21, 2017


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Posted on Jan 02, 2017

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SOURCE: Hi I have Mackie DFX-12 Mixer along with 2 Power

Run your speakers cables to your stereo "outs" (L/R) then run your sub off of one of your aux "outs" or sub group "outs" (make sure you assign channels to sub group out).

Posted on Feb 25, 2011

  • 5603 Answers

SOURCE: Have a Mackie 1604 VLZ

One of the power supplies has failed. This can either because of a short on it or the regulator chip has failed. Unplug the power cable from the main board. At one end are the +/- 16 volt supplies with ground in the middle. and the other end has a ground and the 48 volt phantom power. There are a couple grounds near the middle and a 10 volt power as well.

Here is your schematic:

Scroll down to "get manual" and click on it to download. IGNORE other download links... they are for third party PDF readers.

The order to troubleshoot: Unplug the power cable from the supply to the main board. Test for those voltages with power on. If they are NOT there, disassemble the pod to get to the power supply and troubleshoot for the missing +/-16 volt supply... May be shorted by
a cap or the regulator chip may have failed. If the supply voltages are there, turn off power and replace the connector being VERY careful to not get it a pin sideways as there is NO index. Next disconnect the audio cables to the pod and reach in and check the voltages on those pins again on the power cable, or just note if the LED's are still screwed up... If they are, congratulations... you get to remove the POD from the back.... 4 screws... and then get to carefully pull every knob off the panel and using a small hex allen wrench remove a bunch of screws to release the main board. There is a dust cover for the faders... remove this noting the oreintation and DO NOT forget to replace it when you are done. Now you can reconnect the power supply to the bare board. First thing is to visually inspect for the obvious... next with power on use a "calibrated finger" to look fo a hot chip that might be sucking the current... beyond that you use the techniques of millivoltmeter searching for where the current is shorted looking for the place where that voltage goes to near zero. This uses the resistance of the power buss. When it is all repaired you get to put those knobs back on... been there, done this... I had a bad chip that was the driver for the MAIN INSERT... stuck down between the main fader and the one next to it. ALWAYS power all interconnected equipment form the SAME receptacle or power conditioner to avoid the ground bounce damage like this.

Posted on Aug 06, 2011

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SOURCE: i have a mackie fx 8 mixer connected to two thump

Balanced audio interconnects (either XLR or TRS cables from the mixer and then balanced audio interconnects from the amp daisy chain inputs to the existing speaker inputs. If the amps do not have linked input jacks, then use TRS type WYE connectors at the inputs. Then use speaker rated cables from the amps to the passive speakers.

Posted on Aug 13, 2011

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SOURCE: 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 possible problem in the

If fuses keep blowing there clearly is something wrong with the power amplifier. You can start by getting access to it and doing a visual inspection for signs of overheating or short circuits but then it will be necesary to check parts and eventually you will be able to isolate the defective part(s) and repair it.

Posted on Dec 26, 2013

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SOURCE: is it normal for a thump when turning on active mackie speakers

Yes, it's normal. You can probably turn the speaker volume down to minimum before turning them on to minimize it.

Posted on Jan 31, 2015

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Hi my mackie thumps 100 watt aren't delivering a decent volume ,,I,m using mackie mixer please help

Is this a new problem? In other words, was it working correctly at some point?
You ned to isolate the problem. Plug a different source into the speakers and plug the mixer into a different amp/speaker. See which part isn't working correctly.. Either way, it's likely you need to take the part that's not working to the shop. You can contact Mackie to find the nearest service center. Service Locator Mackie

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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

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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.

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.


Hope it helps. Regards.


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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

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What voltage and power from the transformer mackie mr8

This is just a hint as I was unable to find the schematic. Transformers VERY seldom fail, if you are getting anything out and the fuse is holding with no heating, the voltages are probably right.

Common voltaages seen after the rectifier and filter and regulators are +/- 15 volts and sometimes +5 volts. For the power amp they are usually between +/- 35 and 60 volts unregulated.

For small amps using the TDA2050 type amps, you will see aproximately +/- 24 volts DC unregulated.

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1 Answer

Sir, while ago i sent a message to you regarding my 1202-vlz3 mixer (mackie) i to know how much the secondary voltage supply ?? thanks and god bless

The schematics don't show this, however reverse engineering this there are two windings... one is for the phantom power of 48 VDC... this winding needs to provide about 55 to 60 volts DC to the 48 volt regulator. EXPECT around 40 to 50 volts AC on this winding to the full wave bridge of D1,2,3,8.

The +/- 16 volt power regulated by LM317 and LM337 regulators will likely require about 20 volts DC into the regulators. It will be less than 25 volts because there is a 25 volt cap filtering.

Given a 20 volt DC from the diodes D5,6 and diodes D4,7 the transformer will be around 15 VAC either side of the centertap.

A minimum would be 12.5 VAC and say 18 VAC either side of center.

You should see near pure DC across C1 and C2 with only a little ripple of 2 volts MAX. The ripple should be 120 Hz. An oscilloscope is your friend in this area !!!

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1 Answer

Mackie 1604 VLZ3 Issue.

Hi kielhunt
It sounds like power supply issues.
You may have bad capacitors and/or bad regulators.
If you have a multimeter you can get in there and check the dc voltages for ripple(ac voltage mixed with dc) or over/under voltages along the +/- 15volts lines.
Good luck

Jan 20, 2010 | Mackie 1604 Vlz3 16 Channel Mixer

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