How to deal with boomy notes which cause clipping in amp?
 

So my G note gets pretty boomy because of the guitar's main air resonance.
I noticed that while playing outside today, that note can spike up the volume/frequency which then causes clipping in my amp.

I was wondering if any of you are familiar with this issue?
Is there a way to control the offending note's frequency,
So that it doesnt stand out and clip my signal?

Which G? On the bass string? Is it just G, or is it any note played on that particular string. With an under saddle pickup, commonly the low E and/or high e strings are out of balance due to there being more downforce on the saddle and consequently on the pickup at the ends.

Let's first find out why, then we can work on the how.

To answer your question, some EQs are capable of "pulling out" a note out of the signal, so it can be done.

I suspect your pickup is not evenly balanced across the strings...

You need a Parametric EQ to tame it. Add a sharp cut at 100 Hz.

The open G is quite boomy,
But also the G note on the 4th (D) string on the (5th fret).

The boominess is there also when I am unplugged.
It's just a guitar resonance thing I guess, which gets amplified when amplified hehe

That's what soundhole plugs are designed for.

https://reverb-res.cloudinary.com/im...bj9h3p2rft.jpg

There may be other issues and valuable solutions which others have described in your situation but if chamber resonance is the main one then a decent f/bb will get you most of the way there.

G2 and G3 are at 98hz and 196hz, respectively. So an eq with 100 and 200hz settings could possibly help to cut those frequencies out. The LR Baggs PADI has a notch filter that can be dialed in for particular notes as well.

Good luck with it.

Yeah I am using that.
The boomy note was A before I put on this cover.
Now it's G hehe

Reducing the sound hole area will lower the chamber resonance frequency. I'm surprised it isn't lower than G (98Hz) with the sound hole completely covered.

Ok, need more info:

Guitar (type/model)
Pickup (type/model)
Preamp/EQ
Amp model
Typical performance environmemt
Existing tools available (EQ pedals, cement mixer, etc.)

Agree with YamahaGuy, a notch filter will work.

Have you had the nut and saddle checked?

Oh, that's because I have a small soundport on the upper side !
I should try and cover that too,
however I am afraid it will kill the tone.

Can you tell me more?
What needs to be checked there?

Cordoba GK studio Negra
Fishman Presys Blend (mic + ust)
Fishman loudbox mini charge
Sometimes at homes, sometimes on the street busking.
Got a small 7EQ pedal - Ammoon 3C where the 1k frequency is lowered drastically because it just sounds like **** lol

How close is the amp placed near you and is it in front of you, to the side, or behind? Set fairly high in volume?
Have you tried some distance between you and the amp?

A decent mixer has a lo cut switch usually at 100 hz for just this problem.

Also a feedback buster will knock this down as well.

And also

I believe are key to your solution.

Sometimes in front, sometimes behind, sometimes to the side.
And also sometimes its close and sometimea its further away.
It doesnt matter much.

As to volume , I would say it's about medium , maybe a little more

Hey, what do you suggest regarding the pickup?

First the soundholes.

The soundhole plug prevents a strong bass resonance building up in the structure of the body. It's similar to the difference between ported speakers/monitors which use escaping (and returning) air to simulate a much bigger cabinet (most cheap monitors) and "infinite baffle" (sealed boxes) which are either small and lacking bass or full range and huge (ye olde Yamaha ns10/Kef 103.2).

In some respects it doesn't matter where the air is flowing in and out of, the plug is not doing it's job as designed. Now, you may be lucky and hit on the perfect balance of killing your problem resonance without sealing the box but I think that's unlikely.

If you seal the small port you will lose some *acoustic* bass but if you don't you'll have to filter it out electronically anyway to avoid feedback so swings/roundabouts. I suspect if you can kill the acoustic resonance you can ramp up the amplified bass to more than compensate...

...except ...for the mic.

I don't know the Presys Blend. Does the EQ work on UST, mic or both after they've been blended? I've seen various combinations over the years.

It would be useful to know if there is one element of the system (UST vs mic) which is responsible for the booming. If it were me I would cover the port with something of significant mass, kill the mic for the time being and see how hard you can push the volume without losing it. It may not sound pretty but knowing the result of this will inform the next step.

I'm no expert but maybe if the saddle is not sitting perfectly flat in the bridge, it my have more/less pressure under certain strings making them louder. Same with the nut.

just seems odd that it is louder on certain notes unplugged too.

Run into this sort of thing at an open mic I help with. Our mixer has a built in compressor. Dialing in some compression usually smooths the hot spike. This is the quick and dirty on the fly solution.