250 Hz Bump?

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doncolga
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250 Hz Bump?

#1 Post by doncolga » Mon Jun 04, 2018 10:12 pm

Hey everybody,

I apologize I just realized I put this in the wrong place.
DCollins Pink Noise.png
This is pink noise at my mix position. Monitors are in front of me to my left and right, equilateral triangle from me about three feet, and the sub is corner loaded. Back of left and right are about six inches in front of a brick wall. Any positional things I can try to bring down this bump around 250?

Thanks,

Donny O. Collins
Donny Collins
Built:
Two 18" Tuba 30's 3012 LF
Two 26" Tuba 30's Lab 12
Two OmniTop 12's DL 2512 (Melded Array)
Presonus Studio One DAW
Harrison Consoles MixBus 32C DAW

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Tom Smit
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Re: 250 Hz Bump?

#2 Post by Tom Smit » Mon Jun 04, 2018 11:24 pm

I am going to guess that it has to do with the 32hz because the 2nd octave is strong, and your 250hz (3rd octave) is strong. The 63hz may have been in a null.
TomS

CoronaOperator
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Re: 250 Hz Bump?

#3 Post by CoronaOperator » Mon Jun 04, 2018 11:57 pm

Can you move your mains further away from the back wall,try for 3 feet? Looks like boundry loading from 125-300hz from the mains being so close to the back wall. Above that the mains would be directional and wouldn't get that bump. If you can't move the mains, then EQ that out. I would also try reversing the polarity of the monitors just to see what happens. Indoors it could also just be the room or panels vibrating reinforcing those freq.
Built:
17" width 10" driver Autotuba
2 x 29" width dual Lab12 Tuba60
6 x DR250 2510/asd1001
In progress:
2 x DR250 2510/asd1001
For best results, point the loud end of the array towards the audience

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doncolga
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Re: 250 Hz Bump?

#4 Post by doncolga » Tue Jun 05, 2018 7:21 pm

Good grief...this corner loading is insane. I'm listening to some film scores...wow...just wow...hearing stuff I've never heard that's really, really low.
Donny Collins
Built:
Two 18" Tuba 30's 3012 LF
Two 26" Tuba 30's Lab 12
Two OmniTop 12's DL 2512 (Melded Array)
Presonus Studio One DAW
Harrison Consoles MixBus 32C DAW

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Bill Fitzmaurice
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Re: 250 Hz Bump?

#5 Post by Bill Fitzmaurice » Tue Jun 05, 2018 9:08 pm

CoronaOperator wrote:
Mon Jun 04, 2018 11:57 pm
Can you move your mains further away from the back wall,try for 3 feet?
Too far. Placing the baffles about 14 inches from the wall would give a reflection sourced (Allison Effect) dip centered around 250Hz.

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