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Ole Dollar

Can 2 Way Jubilees Use False Corners?

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I have searched the forum and found many articles on the KHorn and false corners but I am still not sure they can be used with Jubilees.

  • Can the Jubilees use false corners?
  • Would the size of the corner need to be different than that described in "Dope for Hope"?
  • Is anyone using false corners with Jubilees and how is that working?

 

My room is not perfect as my best wall has fieldstone on it with a ledge that sticks out about 15 inches which keeps the bass bins away from the walls. Thoughts?

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1) Yes-but most people call them "wings"

2) Yes-- see the plan view diagram here:

Jub Wings.png

 

3) I don't know.  I'm not using wings since I cross to tapped horn subwoofers at 40 Hz, which have -3 dB response at 14.5 Hz

4) Anything that can help transition the bass bin mouth to the adjacent walls will increase low end extension.  Simply providing a bridging baffle from the Jub bass bin mouth to the walls will certainly help. 

If you wanted to get fancy, you could also put a nose on the bass bin between the horn mouths, like what you see when you look at a La Scala bass bin.  That would help with the higher frequency polar coverage:

 

bass bins.png

 

 

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Here is an example of a loudspeaker that uses "bridging baffles" that can also be used without support from the adjacent walls--the Klangfilm Bionor (designed in 1953).  It's 8.2 feet across and a bit more than 6 feet high as shown (2.5 x 1.8 metres without the feet):

 

bionor6.JPG.7d23d5cec094da5e987876a580a1196a.JPG

 

...and an example of built-in baffles for DIY unity horns:

 

finale6.jpg

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2 hours ago, Chris A said:

I'm not using wings since I cross to tapped horn subwoofers at 40 Hz, which have -3 dB response at 14.5 Hz

Chris:

 

Thank you for the reply. I hope you don't mind an additional question. In the drawing at the top I see the wings in blue - are the thick black lines the room corner of a false corner?

 

Okay your answer on tapped horn sub-woofers are very interesting. I have already started researching as this solution looks like more fun.

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Love giant horn speakers and I learned something new today, The Klangfilm Bionor, and once again on Youtube,  one can find hidden treasures. Thanks for the pics Chris. I even dig the Russian song. They sound great on my Senns, by the way.

 

 

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29 minutes ago, Ole Dollar said:

In the drawing at the top I see the wings in blue - are the thick black lines the room corner of a false corner?

 

The thick black lines are the room boundaries, and the blue lines are the wings. 

 

The implication of the diagram is that wings will extend from the room corners farther than Khorn false corners.  This is a function of the shallower "splay" angle of the Jubilee bass bin mouths than the Khorn bass bin mouths. 

 

34 minutes ago, Ole Dollar said:

Okay your answer on tapped horn sub-woofers are very interesting. I have already started researching as this solution looks like more fun.

If you need more information on the DIY TH-SPUD design, I've got it.

 

Chris

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