20 Most Recent Mackie MR8 150W 8 Active Two-Way Studio Monitor MR8 Questions & Answers

I built a web page on how to replace the tweeter on the MR8. Lots of good photos to help you with this problem. You can find it at: http://www.idahomojo.com/IdahoMojo/Mackie_MR8_Tweeter_Replacement.html Hope it works out for you!

Mackie MR8 150W... | Answered on Nov 07, 2012

Open the unit and remove one wire from one of the woofer terminals and using an ohmmeter check the resistance between the terminals. It probably should be between 6 and 16 ohms... they don't give the specs on the speaker... if it is very high or infinite resistance, the voice coil is blown and you be re-coning or buying new speaker. These are close in speakers and intended for a small room for studio listening while mixing. If the speaker is OK, then the bass amp in the cabinet has a failure... pray, as that is cheaper to repair than a speaker.

Mackie MR8 150W... | Answered on Sep 23, 2011

If this monitor is humming without nothing connected to it, maybe the electrolytic capacitors from its power supply are bad - they are responsible for filtering the fluctuation at the output of the internal voltage rectifiers that transform the AC input voltage into a DC voltage to feed its internal amplifier.

When they fail, the supply voltage for its internal amplifier that should be flat, continuous, now presents a pulsating profile, according to the mains frequency (generally 60 or 50 Hz, depending on the country you're in). So, the output of the amplifier will be varying at the same rate, producing the humming.

Another possibility is that one internal cable connection that should be shielded is now disconnected or loose and is picking the hum from the internal power supply.

Anyway, maybe you should take it to a service center and have it checked.

Hope this info may help you!

Mackie MR8 150W... | Answered on Mar 11, 2011

The woofers were likely the problem in the first place. DO an ohmmeter check on them.

Note that the ohmmeter often doesn't work for testing piezo tweeters, but does work for the woofers with voice coils.

Mackie MR8 150W... | Answered on Feb 05, 2011

From a site:

Order new replacement tweeters from Mackie by contacting Mackie at: LOUD Technologies Inc.
  1. 16220 Wood-Red Rd NE

  2. Woodinville, WA 98072

  3. Phone (800) 258-6883

Ask for the tweeter for the MR5 & MR8 the part number might be 0030616. The price is about $31/tweeter

Mackie MR8 150W... | Answered on Dec 22, 2010

Sounds like a ground loop. MAKE SURE ALL of your equipment is fed from the SAME receptacle. Make sure the ground pin on the power cable is good (try another cord or swap). Swap the audio cable to verify the cable has a good ground.

Mackie MR8 150W... | Answered on Dec 02, 2010

If nothing is pluged into the speaker and it makes that noise. It is not a ground problem. You either have a blown amp or remotely some bad connection at the large filter caps.

Mackie MR8 150W... | Answered on Dec 01, 2010

What cables are you using? I have found brand new XLR cables that were mis-wired causing hum.
Check that the signal wires connect to pins 2 and 3 in the connectorss and that the shield is tied to pin 1.

Find images of the pin positions here:


Make sure the speakers are powered from the SAME receptacle as your mixer !!!!!

If you are using 1/4 inch connections they MUST be TRS type using BALANCED lines to avoid hum.

Mackie MR8 150W... | Answered on Nov 30, 2010

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.

Mackie MR8 150W... | Answered on Jul 20, 2010

These are Bi-Amped, that is have seperate amplifiers internal for the LF and HF.

First have to find if the amp or the actual speaker driver is bad.

Mackie MR8 150W... | Answered on Sep 01, 2009

You probably have issues with caps in the power supply....I would check that first...open it up and look for buldging caps and replace any that you find....

Mackie Music | Answered on Sep 27, 2019

Here you go
This link to the manual is on the Mackie website
Mackie Onyx 32 4

Mackie Music | Answered on Jun 08, 2019

Hello, check if your Mackie, is with the latest Firmware update, you can get it on Mackie's official website
I sent you the Mackie technical support link
I hope you solve your concern
Greetings Franco Dosil

Hola, revisa si tu Mackie, esta con la ultima actualizacion de Firmware, puedes obtenerla en la pagina oficial de Mackie
Te envio el link del soporte tecnico de Mackie
Espero logres resolver tu inquietud
Saludos Franco Dosil

Mackie Music | Answered on May 03, 2019

Hello Abel, I sent you the link to download the service manual of the Mackie PROFX16
I hope you can solve the problem you have with your Mackie
Greetings Franco Dosil

Hola Abel, te envio el link para que descargues el manual de servicio de la Mackie PROFX16
Espero que puedas resolver el problema que tengas con tu Mackie
Saludos Franco Dosil


Mackie Music | Answered on May 03, 2019

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