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-   -   What happens when a sub is in a corner (http://www.diyaudio.com/forums/subwoofers/188760-happens-sub-corner.html)

djn 10th May 2011 05:00 PM

What happens when a sub is in a corner
 
When a vented sub is placed into a corner do the three boundries boost all the freqs the sub puts out or just a certain range?

What are the neg and pos issues with corner placement

weltersys 10th May 2011 05:27 PM

Quote:

Originally Posted by djn (http://www.diyaudio.com/forums/subwoofers/188760-happens-sub-corner-post2567506.html#post2567506)
When a vented sub is placed into a corner do the three boundries boost all the freqs the sub puts out or just a certain range?

What are the neg and pos issues with corner placement

If the sub is crossed lower than the wavelength of the baffle board at the crossover frequency then corner loading will increase level over the entire frequency range.

Positive attributes are increased level, less boundary cancellation.

Some main speakers don't work well in corners, if the subs are placed in the corner and the mains are not, some time alignment may be needed.

djn 10th May 2011 05:41 PM

Thanks Welt. I don't understand what you mean by the wavelength of the baffle board. Can you put that in laymans terms?

weltersys 10th May 2011 06:02 PM

Quote:

Originally Posted by djn (http://www.diyaudio.com/forums/subwoofers/188760-happens-sub-corner-post2567546.html#post2567546)
Thanks Welt. I don't understand what you mean by the wavelength of the baffle board. Can you put that in laymans terms?

Every frequency has a wavelength, the speed of sound (1130 feet per second) divided by the frequency.

If your sub crossed at 100 Hz, the wavelength of the upper range is 1130/100, 11.3 feet. The baffle board would most likely be less than that length, so the entire frequency range would be increased.

If the crossover frequency was increased to 500 Hz (above the typical "sub" range, but used for illustration) a baffle board 2.26 (1130/500) feet wide will act as half space.

At higher frequencies, the baffle, rather than the corner, starts to define the boundary condition.

Art Welter

CharlieLaub 10th May 2011 07:48 PM

When you corner one of these, it's best to stand tall, avoid eye contact, and back away slowly...

:D

-Charlie

djn 10th May 2011 08:30 PM

Thanks Art. We are moving into a much smaller space and I have 4 subs but never really got serious about placement.

Brian Steele 10th May 2011 09:38 PM

Quote:

Originally Posted by CharlieLaub (http://www.diyaudio.com/forums/subwoofers/188760-happens-sub-corner-post2567661.html#post2567661)
When you corner one of these, it's best to stand tall, avoid eye contact, and back away slowly...

:D

-Charlie

LOL!!

djn 11th May 2011 03:35 AM

Signed the lease today and got to do some measurements. The new room is 15' x 16'. That should be enough room.

CLS 15th May 2011 12:04 AM

That's pretty square. Not a good proportion for audio. With speakers in corners, get ready to have some strong peaks aound 140~150Hz. :(

TerryO 15th May 2011 01:10 AM

Dennis,

Corner placement will excite all the modes within the room. We used to believe that was a good thing, but experience has caused some of us to back away from that position (what pun?).

Best Regards,
Terry


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