How do I cancel the feedback from the microphone to the speakers(????)?

Hello. I would like to ask if it is at all possible to remove the coupling of the microphone with the speakers? It is very annoying because you constantly have to turn down the microphone or speakers so that it does not feedback, because it immediately starts to sound in the speakers. Maybe you know a way to remove this feedback. I would be very grateful. Best regards
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You should insert an equalizer (preferably a 31-point equalizer) into the monitor path (between the mixer and the power amplifier) and use it to cut excitation frequencies.
Feedback eliminators usually do not work well. Sometimes they cut some harmonics, not the fundamental frequency.

At least one of the following conditions must be met and preferably all of them.
1. lower the sensitivity of the preamplifier input
2. position the microphone so that it cannot "see" the loudspeaker diaphragms.
3 Place the microphone behind the speakers if possible.
4. as far away from the loudspeakers as possible.
5. Lower the treble power.
Place a sponge damping pad on the head of the microphone (commercially available).

appropriate positioning of the monitors or front ends (preferably horn sets)
use an appropriate microphone with a suitable characteristic, e.g. cardoid or supercardoid, which means that a microphone in an appropriate position with a loudspeaker can be relatively close and nothing happens (at certain angles, naturally)
This is how the professionals do it and nothing happens, (if the microphone is operated by someone who does not know how to work with it, then it is a coffin, as my colleagues wrote - constant correction or work with a panorama (concerning the front)

if the client has a voice as if he was fed from a grenade launcher by his parents and is deafened by mosquitoes and flies, you have no chance...)

kind regards!

cinek88 wrote:

Welcome. I would like to ask if it is at all possible to remove the coupling of the microphone with the speakers? It is very annoying because you constantly have to turn down the microphone or speakers so that it does not feedback, because it immediately starts to sound in the speakers. Maybe you know a way to remove this feedback. I would be very grateful. Regards

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This is not the case at all. Once the condition is exceeded:
acoustic gain > attenuation has microphone - loudspeakers path

the system will ALWAYS be excited. To deal with the situation you have to:

1) Try to reduce the acoustic gain needed, i.e.:
(a) play / sing louder
b) move the microphone closer to the source
c) move the loudspeakers closer to the audience

2) Try to increase the attenuation between the microphone and the speakers, i.e.:
a) move the microphone away from the speakers
b) position microphones and loudspeakers appropriately in relation to each other
c) reduce reflections (dampen the room)
d) use more directional microphones and loudspeakers

3) get rid of the boost in frequency response, i.e. use an equalizer, depending on the conditions and the skills of the performer, either manual (equalizer) or automatic ("feedback eliminator")

There are no other tips.
They are ranked from best (top) to least appropriate (bottom)

If everyone on the street knew how to eliminate feedback, then everyone would be an acoustician, but for that you need practice and some tips that my colleagues have given you. Practice, practice and observe what happens. There are no perfect measures, there are only semi-measures such as EQ and others, and unfortunately by eliminating feedback, you also lose a little bit of quality.

there is only one rule: to hear singing someone has to sing, to hear music someone has to play. this can only be amplified.

I don't know, but when I was still working on eltrons it was clutching hard. Despite the fact that it had a low power handling and power only 100W. Now I have an eltron, which I say I'm pushing as much as I can with an EP2500 or dap1200 amp, the last yellow LEDs are already flashing on the mixer and on the amp all the knobs are turned and nothing is wrong.... I think it depends on the equipment... because in the UB2442FXPro there is no super eliminator...

And just to clarify, how do the hardware eliminators work? and how is it with the eliminators in graphic equalizers example :
http://www.behringer.com/FBQ3102/index.cfm?lang=ENG

And why are you so critical of behringer? I have a UB2442FXPRO and it has been working for 1,5 years in rain and sand, wind, heat and cold and it looks like new... Not even a rack....

No one has asked what kind of microphone you are working on.
And that matters too...
You can adjust the speakers, combine things, but if the microphone is prone to excitation, it won't help much anyway....

Added after 3 [minutes]: .

john_t wrote:

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5. lower the power of the sopranos.
6 Put a sponge damping protector on the microphone head (it is on sale)

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I disagree...

Re 5 Sopranos only? What if it buzzes in the pit? Are you capturing the sopranos?

Re. 6 Such a protector is by design a protection against e.g. wind in open air and against "explosive" B, P.... voices. Sometimes it is also used to cover the mouth when singing from playbacks, but I have not heard of feedback being suppressed by a sponge. Perhaps a breakthrough?