Question about Mackie Mr8 Active 8" Powered Studio Monitor

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Hi, I have a Mackie MR8 that isn't putting out sound anymore.

There were some clicks and pop for a couple days before it happened. The monitor wasn't putting out as much volume compared to the other MR8, even with the input level adjusted

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  • 225 Answers

I assume that you switched L and R monitors to verify the problem and so I would say that you have a amplifier failure issue. Knowing Mackie, they're probably using an output IC for amplication which although it took some time, has now completely died.

Me being an old-timer I can honestly say....Oh how I miss the discrete transistor and "thru-hole" component mounting days.

Posted on Nov 01, 2012

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Posted on Jan 02, 2017

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  • 4234 Answers

SOURCE: Mackie CR1604 has a consistent click at hi gain

Without hearing the noise or seeing it on a scope, I can't say for sure, but this type of noise can come from a number of sources. If there is a high signal level on one bus, you could be getting some cross-talk from that channel onto the channel with the higher gain setting. Try to track this down a bit by experimentation. For example, do you hear this with NO connections at all, but with the gain turned up on one channel?

Please try a few things to narrow this down a bit and I'll try to provide you with some options.

Thanks,
Dan

Posted on Jul 25, 2009

  • 4234 Answers

SOURCE: Hi, Model: Mackie 1604 VLZ PRO

You may be getting a small amount of cross-talk. How high are the gain settings and sliders when this occurs? Also, can you describe the overall setup that you are using? I'll check the prints, but you should not be getting any volume unless the gains are maxed.

Dan

Posted on Oct 15, 2009

  • 1 Answer

SOURCE: How do I replace the tweeters for the mackie mr8

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!

Posted on Dec 20, 2009

barbu51
  • 566 Answers

SOURCE: 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

Posted on Jan 20, 2010

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  • 5603 Answers

SOURCE: Part # for tweeter in the Mackie MR8? I need 5

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

Posted on Dec 22, 2010

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1 Answer

One of my MR8's has only its tweeter working, im guessing the bass driver might be blown? How can i test this though and be sure it is the bass driver and not just a simple electrical fault?


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.

Sep 22, 2011 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

When I turn it on, the speaker has a loud buzz. The 8" sucks in at that time.


The amp driving the 8 inch has shorted to one of the power rails of the power supply. With the short, the voltage is dragged down to the point that the filter caps can't keep it up so you hear the hum or buzz. DO NOT operate it as it is driving a high current into the speaker and will blow the voice coil...Take unit for repair.

Apr 26, 2011 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

Hi, I have a problem with both of my Mackie MR8s. They both play really quiet, like ridiculously quiet with no low end at all. They don't make that "clicking" sound when you turn them on either....


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.

Feb 05, 2011 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

Part # for tweeter in the Mackie MR8? I need 5


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

Dec 22, 2010 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

I have 2 mackie mr8's and only one does it. can you help me. basically when i turn it on after it being off for a while, the driver 'sucks' in and makes a loud buzzing sound. can you help please


For some reason the power amp is saturating to one side of the power suply rails. This can happen if :
1. Power supply looses one of the polarities.
2. The Power amp circuit loses the DC feedback and saturates to one of he rails.
3. A circuit board trace or bad solder loses one polarity to the power amp.

DO NOT permit the unit to run this way for any length of time because it will burn out the voice coil of the speaker.

The buzzing is due to the amp losing feedback and basically connecting the speaker to one side of the power supply. The ripple current of the supply causes the buzzing.

Put a 40 wat light bulb in series with the hot lead of your line cord to act as a current limiter while troubleshooting the problem. You can find the problem with only a voltmeter.

PARTS OF THE SCHEMATIC "MAY" be close to this document:

http://elektrotanya.com/mackie_hr824_studio_monitor.rar/download.html

Dec 02, 2010 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

Very loud ground hum when turned on


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.

Nov 30, 2010 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

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.

Jul 20, 2010 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

I have mackie mr8's my left one, when powered on makes a loud buzzing sound...i have disconnected power and pre amo...reconnected and it still happens...whats wrong?


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.

Sep 19, 2009 | Mackie MR8 150W 8 Active Two-Way Studio...

1 Answer

Same here man...


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.

Aug 19, 2009 | Mackie MR8 150W 8 Active Two-Way Studio...

4 Answers

How do I replace the tweeters for the mackie mr8 is it from the rear or does the front pops off Thanks!


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!

May 18, 2009 | Mackie MR8 150W 8 Active Two-Way Studio...

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