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Kick Bin Design Idea B&C 15ndl76

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luthier View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2019 at 11:51pm
Little more progress on the horn path to improve the LPF & linearity of the response.


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luthier View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2019 at 11:52pm
Front chamber is now down to 16L and the s2 and s3 have increased a fair bit.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2019 at 11:59pm
Here's the 2pi in case anyone is interested, I wish it looked this good in 4pi! 

(not too bad for just over 125L, I don't think)




Edited by luthier - 04 February 2019 at 12:00am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote shello79 Quote  Post ReplyReply Direct Link To This Post Posted: 06 March 2019 at 12:46am
any progress on this idea

Work hard play even harder
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 06 March 2019 at 11:30pm
No big progress yet, I've been working a lot recently and havn't had much energy. 

I'm increasing the throat size to reduce the compression ratio, I'm also moving away from the porting. My thoughts being if I can't get the results I want with a sealed chamber there is nothing stoping me adding them at a later date. 

Removing the ports has a few noticable implications it increases output above 130hz and causes it to drop drastically below 120hz. To increase output in the lower region I have to reduce the chamber volume to 40L. 

Interestingly if I model the horn as a single section (without ports) the off axis response is relativley smooth and very sensitive. 


 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote RoadRunnersDust Quote  Post ReplyReply Direct Link To This Post Posted: 12 March 2019 at 10:21pm
Thumbs Up Interesting design/build to follow!

Have you tried sim'ing the Beyma 15LW30 in it?
Buying myself a TFL-760H... piece by piece >.<
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Post Options Post Options   Thanks (1) Thanks(1)   Quote fatfreddiescat Quote  Post ReplyReply Direct Link To This Post Posted: 13 March 2019 at 8:17pm
Hi Luthier, just found this again, I was meaning to post it a while back but couldn't find it,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 15 March 2019 at 8:58am
Originally posted by RoadRunnersDust RoadRunnersDust wrote:

Thumbs Up Interesting design/build to follow!
Have you tried sim'ing the Beyma 15LW30 in it?

Thanks! 

I did try it in the ported  version. Here's the Beyma (grey) vs the 15ndl76 (black)




Edited by luthier - 15 March 2019 at 9:00am
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 15 March 2019 at 10:38am
Thanks for that, It was a really informative read!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote luthier Quote  Post ReplyReply Direct Link To This Post Posted: 15 March 2019 at 11:32am
Originally posted by fatfreddiescat fatfreddiescat wrote:

Hi Luthier, just found this again, I was meaning to post it a while back but couldn't find it,

Thanks for that, It was a really informative read!

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