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Suckout at 40 hertz...less pricey solutions?

Can bass traps or other room treatment help with measured 40 hertz bass suckout?

Problem is my listening room is almost a square.

My speakers Have powered woofers and try as my speaker dealer has to dial in the speakers he could not eliminate the 40 hertz suckout without making matters worse

my four walls and ceiling have absorption material and the ceiling is not flat nor low. It's a sloping ceiling 9-12 feet

I could massage part of the problem by adding an additional powered woofer to the speaker . The upgrade to my model is designed to have a powered woofer On top and bottom.

Cheaper of course would be room treatments

most expensive would be knocking out a wall making a rectangle but that in my converted garage would be the most pricey!

Any thoughts

thanks

mike

ps. Room sounds good but would like to within reason maximize potential of my excellent equipment
radioheadokplayer
dgordonl
128 posts
 
Is you equiptment setup on the 9ft side of the ceiling with the sound going up to the 12ft.which would be the correct direction.You must follow the vault upwards with the sound.
Any other direction might cause the suckout.
acoustat6
357 posts
 
Hello Radioheadokplayer, What program did you use to measure this? How deep is the null? If there is a null there must be peaks, where and how big are those? Are you using a sub? How low does your sytem go? Can you post the in room freq response plot?

Bob
ojgalli
165 posts
 
Don't be overly concerned with nulls for two reasons.
1) Nulls are almost impossible to fix.
2) Level out the peaks and you've half fixed the nulls.

Peaks are much easier to handle. EQ is the obvious way, but before sinking money into that you might try speaker position first. A couple of feet this way or that with the speakers and/or your listening position can make a surprising change in bass response.
shadorne's avatar
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shadorne
7,467 posts
 
Agree with Ojgalli - your only viable option is to get a subwoofer and position it a little way forward into the room and then EQ it with notch filters so it does not add to the speakers peaks.

You need an enormous amount of acoustic treatments or a specific designed helmholtz resonator to have any effect at 40 Hz.
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