Table Tuba - Integration with Home DJ Booth - Loading Idea

For livingroom sound better than in a theatre.
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MajikLasers
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Location: Chicago

Table Tuba - Integration with Home DJ Booth - Loading Idea

#1 Post by MajikLasers » Fri Jul 05, 2019 2:52 pm

This is my home DJ booth project with integrated Table Tubas. The booth design and room layout don’t allow for corner loading, but the horn mouths will be firing toward a wall (from a 30-36” distance).
DJ Booth.jpg


My thought is to build faux loading walls that redirect the rear sound waves from the driver access hole, to the same plane as the horn mouth.


DJ Booth SUB LOADING 1.jpg
DJ Booth SUB LOADING 2.jpg


Thoughts on how well (or poorly) this will work?

How might the sound be affected?

What are some things I can expect?

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Bill Fitzmaurice
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Re: Table Tuba - Integration with Home DJ Booth - Loading Idea

#2 Post by Bill Fitzmaurice » Fri Jul 05, 2019 3:12 pm

Where the chamber openings contribute to output is well below the range of music, so you should just seal them.

MajikLasers
Posts: 67
Joined: Fri Aug 22, 2014 6:17 pm
Location: Chicago

Re: Table Tuba - Integration with Home DJ Booth - Loading Idea

#3 Post by MajikLasers » Fri Jul 05, 2019 3:19 pm

Thanks, Bill. At what frequency does the chamber output begin? I have plenty of tracks with 25-30hz content.

Grant Bunter
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Re: Table Tuba - Integration with Home DJ Booth - Loading Idea

#4 Post by Grant Bunter » Fri Jul 05, 2019 3:29 pm

Your thoughts on being 30 to 36 inches from the wall are going to lead to some frequency cancellation.

In the sub sticky, which you can find here:
viewtopic.php?f=10&t=398
It says this:
If there is a 'prime directive' when it comes to sub placement it is this: Never place subs with their radiating planes between 2.5 feet and 8 feet of a boundary. If you do at some frequency the within the 35 to 100 Hz passband, depending on the distance, the reflected wave will be 180 degrees out of phase when it meets the original wave again, cancelling it out.
30-36 inches is within 2.5-8 feet.

Maybe it's not too late to redesign your booth, placing the 2 tuba's together on one side, and closer to the wall, and have some legs on the other side holding the table top up, but still having the 30 to 36 inches for access to the booth...
Built:
DR 250: x 2 (melded array) with March 2012 plans. 2 more under way with CD horn
T39's: 4 x 20" BP102 , 2 x 28" 3012lf.
WH8: x 3 with melded array.
Bunter's Audio and Lighting "like"s would be most appreciated...

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Bill Fitzmaurice
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Re: Table Tuba - Integration with Home DJ Booth - Loading Idea

#5 Post by Bill Fitzmaurice » Fri Jul 05, 2019 3:33 pm

It doesn't do much above 25Hz. Also, if the opening isn't placed close to a wall or floor it can reduce low frequency output.

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