Question about Mackie ProFX12 Professional Compact Mixer

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How do I get rid of the speaker buzz coming from my Mackie ProFX 12 mixer?

Connected to Harbinger Powered Speakers. Buzz even when nothing else is plugged in.

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Maybe an open ground somewhere or something needs shielded.

Posted on Nov 18, 2014

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2 Answers

What causes buzzing in speakers?


There are many causes of buzz, so it should be checked step by step :
- Bad connection on the input connector, or cord.
- Amplifier, basically have the block diagram like this:
25850676-l1qpqmriditabltrjczr2eku-5-0.jpg If in one block damage, buzz can be heard.In the amplifier.
Generally occurs in the PSU and / or power amplifiers.
Fix it to the experts,because it requires a good knowledge of electronics.
Blown speaker cone, does not cause a buzz.
Short circuit along the wires supplying the audio, it will not cause any sound in the speakers, including the sound of music.
Try also, disconnect the input connector, whether the buzz is still audible. If after the input connector is removed, the buzz disappears, the possibility of buzz came from another device before the amplifier.

Sep 05, 2015 | Behringer Xenyx 1202fx Mixer 12 Input 2...

3 Answers

What would cause a buzz in speakers?


There are many causes of buzz, so it should be checked step by step :
- Bad connection on the input connector, or cord.
- Amplifier, basically have the block diagram like this. View image.25850665-l1qpqmriditabltrjczr2eku-2-0.jpg
If in one block damage, buzz can be heard.In the amplifier.
Generally occurs in the PSU and / or power amplifiers.
Fix it to the experts,because it requires a good knowledge of electronics.
Blown speaker cone, does not cause a buzz.
Short circuit along the wires supplying the audio, it will not cause any sound in the speakers, including the sound of music.
Try also, disconnect the input connector, whether the buzz is still audible. If after the input connector is removed, the buzz disappears, the possibility of buzz came from another device before the amplifier.

Sep 05, 2015 | Behringer Xenyx 1202 12-input 2-bus Mixer...

1 Answer

My speaker sounds like it is blown


take it to a Sound Production company and ask their opinion. If they use Mackie gear-even better. They will better be able to tell you what's goin' on if they hear the speaker. Good luck.

Oct 16, 2013 | Mackie SRM450V2 POWERED SPEAKER

1 Answer

How can i get more volume on my onstage monitors thru my mackie 2404 vlz3 mixer or what is the proper way to connect the monitors


Without more information of your speakers and amps we can't really help you. The Mackie board puts out line-level signals and that should drive any connected amp or powered speaker to the full capability. Make sure you are using BALANCED interconnect lines either XLR or TRS cables. Use of TS unbalanced cables costs you 6 DB and also noise pickup. Make sure ALL your gear, amps, speakers etc are powered from a SINGLE receptacle or power conditioning module. Normally you will use the AUX outputs of the mixer by way of TRS cables or balanced lines in a snake to power amplifiers onstage which then connect to the stage monitors. If you have powered monitors the returns of the aux to the stage go to the powered monitors. A heavy duty extension cord brings power back from thee stage power to the mixer.

Sep 06, 2011 | Mackie 2404-VLZ3 Mixer

1 Answer

I have a mackie cfx12 mixer with mackie powered speakers.At a gig tonight i set up as usual and had strange highly amplified sounds coming thru speakers from microphone when reverb was on-the effects had...


Make sure you are using BALANCED interconnection cables to the speakers, either XLR or TRS connections. ALSO make sure all interconnected equipment such as the speakers AND the mixer are powered from the SAME receptacle at the venue... yes you have to run extension cords... the pro's do it so they don't have hum and other noise and don't damage their equipment.

Aug 14, 2011 | Innovative Concepts Corporation Odyssey...

1 Answer

I have a mackie fx 8 mixer connected to two thump 15 " speakers. i want to add a set of base non- powered speakers with power amp to my fx 8. what are the connections?


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.

Aug 12, 2011 | Mackie ProFX8 Professional Compact Mixer

1 Answer

Buzz sound


You've made a statement, please give full information if you would like help. Is the buzz heard from the speakers or the mixer? Do you get normal sound too? Is it there with no input? Does it change with the output setting? Help yourself to get help and let us know properly what's going on.

Jul 19, 2011 | Mackie 1604 Vlz3 16 Channel Mixer

1 Answer

Hi, I'm dealing with a problem on my Mackie ProFX 8 mixer. For no reason that I can discern, I am simply not getting any signal out of the mixer. I've adjusted the appropriate levels and gains,...


Are you getting signal into the mixer? Do the level meters light up?

If so, check your speaker cables. If not, check the mic cables and mics (try with phantom power on and off).

Also, try plugging a speaker into an Aux out to see if you can get level out of that.

Hope that helps...

Jul 01, 2011 | Mackie ProFX8 / SRM450 V2 PA Package

1 Answer

I turn it on and at the volume set @ U or straight up(midway) nothing comes out. if you turn it all the way up of course you get alot of buzz and barely get any sound from a mic or mixer signal,etc. could...


Make sure you are using BALANCED line to this... XLR connections boyh ends. Make sure ALL interconnected devices are powered from the same receptacle or power conditioner. Test your cables... they do go bad. This unit REQUIRES line level input. Do NOT expect a mic to drive it directely. Make sure your mixer uses the XLR outputs and is powered from the same receptacle, even if you have to run an extension cord to it. This is a bi-amped speaker so there are independent amps for high and lows. With nothing out and known good in there is very little electronics before the signal is split to the separate amps. At line level, your volume control should probably be about 2 o'clock with the EQ's straight up flat.

Apr 25, 2011 | Mackie TH-15A Active DJ Powered THUMP...

1 Answer

How do I hook up two powered 15's and two passive 15's to this mixer(1202-VLZ3)?


You connect the powered 15's using balanced cables. The passive speakers you will have to get an amplifier for as the mixer does NOT have a powered output, only line-level audio outputs.
The powered speakers MAY have audio line level outputs to continue to other powered speakers or, as in your case, external amplifiers to drive your passive speakers.
Remember to power ALL interconnected equipment from the same receptacle or source to avoid ground bounce faults that can destroy sensitive circuits in your equipment.

Mar 05, 2011 | Mackie 1202vlz3 12 Channel Mixer

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