How to achieve bass in a cubical-shaped room

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zobsky

zobsky

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#1
A friend's upstairs HT / listening room is unfortunately near cubical apart from being partly open to a large vaulted area on one side. No matter what we try, there seems to be some sort of bass / mid bass suckout.

What are our best options? DIY is no problem and I have a variety of drivers available.

Thanks
 
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#2
You can try putting some muckets in the floor, courtains or some other absorbent material to stop standing waves in the room. I believe that if the place where it is not acoustical, few things can you do in the audio equipment, except a parametric equalizer and attenuate all resonant frequencies in the audio program being reproduced.
 
#3
zobsky said:
A friend's upstairs HT / listening room is unfortunately near cubical apart from being partly open to a large vaulted area on one side. No matter what we try, there seems to be some sort of bass / mid bass suckout.
Click to expand...
Try covering the opening to the vaulted area with a piece of plywood, if that works a door could be installed, or a rolling divider made.
 
#4
Cubic room😱...:scratch:...:bulb::
Probably more than 2 subs would be a fruitful cure..

b🙂
 

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#9
suck-out you say. What you've got there is phase cancellation. One of the distances of the sub to one of the boundaries is 1/4 wavelength of the frequency being cancelled. Figure out what frequency is being canceled and you will be able to tell which reflection is causing it.

He's going to need careful placement and multiple subs placed at varying distances from boundaries so the suck-out one sub experiences is covered by the others.
 
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#10
revboden said:
suck-out you say. What you've got there is phase cancellation. One of the distances of the sub to one of the boundaries is 1/4 wavelength of the frequency being cancelled. Figure out what frequency is being canceled and you will be able to tell which reflection is causing it.

He's going to need careful placement and multiple subs placed at varying distances from boundaries so the suck-out one sub experiences is covered by the others.
Click to expand...
Careful placement and multiple subs may be needed, unless closing the opening to the large vaulted area on one side eliminates the suckout, as it did in a studio I recently "fixed".
The difference made by simply placing a gobo in front of the opening was obvious even without any test gear, the control room smoothed in response by an order of magnitude (as confirmed by the test gear).

No speaker position changes or additions were needed.
I hardly made any money on that consultation 🙁

Art
 
#12
weltersys said:
Careful placement and multiple subs may be needed, unless closing the opening to the large vaulted area on one side eliminates the suckout, as it did in a studio I recently "fixed".
The difference made by simply placing a gobo in front of the opening was obvious even without any test gear, the control room smoothed in response by an order of magnitude (as confirmed by the test gear).

No speaker position changes or additions were needed.
I hardly made any money on that consultation 🙁

Art
Click to expand...

Agreed, I should have said, multiple subs 'may be" necessary, careful placement will be necessary either way for optimal performance.

I have a Helmholtz absorber attached to my Theater room. When I open the door to the hallway to the back-room I get a massive energy suck at ~60hz in the theater but In the back-room, WOW, the bass at around 60Hz is awesome 🙂 as the theater plus the hallway makes a huge Helmholtz resonator.

fun with physics 😀
 
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