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Tapped horn for B&C 15TBX100

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Dref View Drop Down
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    Posted: 25 April 2011 at 8:28pm
Hi All

I wanted to show the project i have worked on the last few days, even though it is not completely finished. I had a B&C 15TBX100 laying around so I thought i'd build a tapped horn for it as it has shown to be a nice driver for this purpose. I have used the same folding as wood1y used for his RCF tapped horn:
http://www.diyaudio.com/forums/subwoofers/170749-15-tapped-horn-rcf.html

But I have modified it a bit to make it more suitable for the B&C as my simulations showed that it needed a bit higher compression ratio to get a flat response:
http://img135.imageshack.us/img135/2177/drawingth15tbx.jpg

I am so fortuned that I have access to the finest grade of 18mm BB ply in sheets of 3000x1500 so I was able to build it almost out of a single sheet:
http://img197.imageshack.us/img197/6520/cutsheetth15tbx.jpg
I cut the big bracing of the bottom piece instead of piece F  and then made F of 2 pieces of 12mm which I glued together.

Here are some build pics:(Hope I have downsized them enough)













I also did a crude 2,83V/1m measurement(I will make a better one when I get a better mic and soundcard). The blue graph is the Tapped horn and the red is a William Cowan Horn loaded with Eminence EPS 10300L.


After this i am beginning to trust the specs of the real TH115 i have never heard a 15" make so much sound.
We used it for a party and it managed to knock a few bottles and beer cans of our bar Tongue and it was never feed with more than 400 watt.

Some pics of the measurement: (This cat is a serious bass lover)















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Nachural View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Nachural Quote  Post ReplyReply Direct Link To This Post Posted: 25 April 2011 at 9:46pm
Nice build, bet it blew the cat away!
it's all just cardboard and magnets really
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Beatdaddy Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 4:13am
Good job man!
Is that a jensen-healey?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FlipC Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 5:05am
Nice build.

Whats the reverse view of where you did those test.
Nice #'s

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Post Options Post Options   Thanks (0) Thanks(0)   Quote mykey- Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 5:21am
  Good job man!
Is that a jensen-healey?


looks like a TVR to me


Edited by mykey- - 26 April 2011 at 5:22am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Beatdaddy Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 5:34am
Yah, I think your right.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TechnoChef Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 7:56am
Nah, looks more like a mondeo to me!
I think I'm in love with your mum.
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Dref View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dref Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 9:08am
It is indeed a Mondeo and a TVR 2500MBig smile

Edited by Dref - 26 April 2011 at 9:10am
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Dref View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dref Quote  Post ReplyReply Direct Link To This Post Posted: 26 April 2011 at 9:16am
To one side there is our garage and a corner of the house about 30m away and the other side there is a lawn and a bit further away some trees. It might be a bit to reflective.. so maybe the most useful data which can be extracted from the measurement is the comparison between it and the small FLH.
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Dref View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dref Quote  Post ReplyReply Direct Link To This Post Posted: 27 April 2011 at 11:35am
By request here is the hornresp simulation i used. The reason i didn't post it in the first place is because i don't think it is that accurate.






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Post Options Post Options   Thanks (0) Thanks(0)   Quote CoblosBrengose Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2011 at 5:30am
excellent, thank you sir Dref!
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Dref View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dref Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2011 at 3:59pm
Now with handles, wheels and smooth edges:



Now it only needs a speaker terminal, some paint, a grill and some more testing and fine tuningWink
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