20 Most Recent Mackie TH-15A Active DJ Powered THUMP Speaker Stand and Cable Set TH-15ASET1 Questions & Answers

Remove 115V jumper in the Power Supply Unit at secondary side in order to operate Mackie TH-15A Speaker on 230V. Download Schematic Diagram from the below website:
https://elektrotanya.com/mackie_thump_th-15a_sch.pdf/download.html#dl https://elektrotanya.com/mackie_thump_th-15a_sch.pdf/download.html#dl

Mackie TH-15A... | Answered on Jul 15, 2019

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.


Mackie TH-15A... | Answered on Apr 10, 2017

As Tom Jones sang 'It's not unusual....' The amp has probably gone and you need to get it fixed. These are not the most reliable and I would suggest getting something better from another manufacturer if you can afford it, perhaps a local shop would do you a trade in if they can fix it?

Mackie TH-15A... | Answered on Feb 06, 2017

Jose Miguel Carcamo Cruces do you have pictures of these j112 fet ? Thank you!

Mackie TH-15A... | Answered on Jul 12, 2015

The internal amp is in need of repair. Are there any other symptoms or signs?

Mackie TH-15A... | Answered on May 05, 2015

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

Mackie TH-15A... | Answered on Feb 05, 2015

This link (from Fred Yearian) is not MACKIE THUMP 15A Repair Manual. That is repair manual for Mackie Mixer 1604vlz.

If you need Repair/Service Manual for Mackie Thump 15A,
give your email. and I'll send it,for free.
Some examples images inside of the Mackie Thump15A that I repaired:

Mackie TH-15A... | Answered on Nov 28, 2014

i) I assume the fuse you mentioned was in the mains plug - did you also check the fuse in the TH15A mains input socket? This is accessed by pulling out the tab in the bottom section of the socket (below the centre pin). This is a 3.15Amp antisurge fuse, 20mm type.

ii) If this fuse has blown, then replace it & all may be well ...... but if it blows again, then move to step iii).

iii) With mains disconnected, remove rear panel (outer screws) & check the power supply PCB for damaged components, especially R111 & R112 (100ohms). If the latter are burnt or open circuited, then the amplifier module may have blown.

regards, Dave

Mackie TH-15A... | Answered on Sep 06, 2014

"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?

Mackie TH-15A... | Answered on Aug 05, 2014

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

Mackie TH-15A... | Answered on May 19, 2014

Could be the crossover has died or the main speaker winding has failed. Open her up and connect on side of the main speaker direct to a 9v battery and then wipe the other wire over the other terminal. If you get a crackling from the speaker then it's likely the crossover, if there is no response at all from the speaker then it is dead and possibly the crossover too.

Mackie TH-15A... | Answered on Feb 10, 2014

This sounds like another case of bad connections or soldering in the amp. If it's not too old take it back to your dealer, they should fix it. These are designed (allegedly) to be used and moved about and should not fail. If it is too old then open it up and with care - and with yourself isolated from earth and wearing insulating gloves wobble connections and components until you find the cause. We have had a couple of this sort of fault with newer mackie stuff and it's not been too hard to track down and fix if you're handy with a soldering iron.

If you have any doubts about being competent to do this sort of thing take it to someone who knows what they are doing, it should be a fairly quick fix.

Mackie TH-15A... | Answered on Feb 10, 2014

short circuit in secundary of the power supply or power amps damaged.

Mackie TH-15A... | Answered on Sep 13, 2013

tda8950th damaged. (low frecuency smd amp), good look.

Mackie TH-15A... | Answered on Sep 13, 2013

Crackling is usally one or two things my guess would be bad grounding of the amp or bad connection with the jacks or plug it self try to make it crackle on purpose by jiggling the jacks see if it has any effect on the crackling try to narrow your possibilitys

Mackie TH-15A... | Answered on Sep 13, 2013

Not finding what you are looking for?
Mackie TH-15A Active DJ Powered THUMP Speaker Stand and Cable Set TH-15ASET1 Logo

Popular Tags

32 questions posted

Ask a Question

Usually answered in minutes!

Top Mackie Music Experts

Michial Gueffroy

Level 3 Expert

1140 Answers


Level 3 Expert

5699 Answers

Joaquim Martins

Level 3 Expert

1127 Answers

Are you a Mackie Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Mackie Music

  • Mackie Music

Most Popular Question

no sound coming out mackie

  • Music