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Old 8th May 2009, 09:31 AM   #1
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Join Date: Feb 2005
Location: Elk Grove, California
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Default Lab12 - Tapped Horn -

Thanks to Don Snyder & Chris.

Click the image to open in full size.

Split off from this long post,

http://www.diyaudio.com/forums/showt...79#post1819879

- 2-sheets of 3/4" 15-ply ApplePly used.

- The blue CAT5 will be used to power some RGB LEDs to illuminate the 1/2" Green-Edge CNC Carving / access panel.

- Coil will be installed later

Here are my current build pictures:

Old Canon 10D, 28-135mm USM-IS, ISO100, F16, 1/80sec.
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Some CNC V-Bit Carving Action:

Click the image to open in full size.

Click the image to open in full size.

Setup took about an hour

Click the image to open in full size.
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Old 8th May 2009, 09:40 AM   #2
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Wow, love the pictures and the build quality, very nice!! Although this is build very rugged, you might consider some bracings at large areas, Since Im in Pro-Sound, I use similar plywood as you do and Ive always had to add some bracings and it always improved the sound (and made rumble from the enclosure walls less).
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Old 8th May 2009, 01:40 PM   #3
tb46 is offline tb46  United States
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Hi layertone,

Nice work! Please, keep us informed as to the placement of damping materials, and other progress.

Also, would you mind sharing name and number of the driver and CNC panel (elegant) mounting hardware?

Regards,
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Old 8th May 2009, 01:49 PM   #4
AndrewT is offline AndrewT  Scotland
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Hi,
what about doubling the number of biscuits?
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Old 8th May 2009, 03:10 PM   #5
steve71 is offline steve71  Australia
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Really nice work and great pics! I like that the driver is visible. My tapped horn is very similar in layout to yours and I get slick of putting on the hearing protection and sticking on my head in the mouth with a flashlight to monitor driver excursion.

I added a ton of bracing to mine, here's a pic if you're looking for some inspiration.

http://www.diyaudio.com/forums/attac...amp=1223240677

BTW how to you intend to finish it - i.e. paint, stain etc.
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Old 8th May 2009, 04:04 PM   #6
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It's great when a plan comes together ...

MaVo did the simulation, Chris8sirhC decided to build the first one, and I did the fold
for Chris. Now, Layertone has built one of the nicest Tapped Horns of this series.

Great job & pics,
Don
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Old 8th May 2009, 05:15 PM   #7
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Great construction !
How does it perform compared to regular boxed sub's with the same driver ( sealed box ? ) ?
Horn's are great for high efficiency but how does this implementation compare ?
I'm asking because the chance of me coming across a similar setup is 'very' remote .
Cheers.
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Old 8th May 2009, 08:06 PM   #8
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Quote:
Originally posted by ashok
Great construction !
How does it perform compared to regular boxed sub's with the same driver ( sealed box ? ) ?
Horn's are great for high efficiency but how does this implementation compare ?
I'm asking because the chance of me coming across a similar setup is 'very' remote .
Cheers.
Much Louder!
Much Lower!
Much Cleaner!

Impossible to design without computer simulation, and 95% of all drivers are unsuitable.

This one has an F3 of 20Hz, but it can only be used to 70-80 Hz. It requires 4th order HP & X-Over filters
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Old 8th May 2009, 08:38 PM   #9
jogi59 is offline jogi59  Germany
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Quote:
Originally posted by Don Snyder


Much Louder!
Much Lower
Really?
It isn`t very much
Click the image to open in full size.
black tappedhorn
grey the same driver with the same inductor in a vented enclosure of the same size (peak at 20 Hz will be lower in reality because of enclosure losses)
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Old 8th May 2009, 09:18 PM   #10
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Now, lets turn up the power ...

1. What happens when the port chokes?
2. Doesn't the vented box run out of xmax first?
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