This is my first Tapped Horn, would you guys please review my design for any flaws before I start construction.
The folding was the most challenging, in fact the input data shown above is from the drawing after attempting to fold it and not what was initially inputted into HR, however the results are close enough and seems satisfactory to what I want, which is extension down to about 35hz. As shown below the drawing follows a folding scheme similar to the THAM 15, this form factor seems best for my placement of the sub.
notice the center line at the corners is this correct or should it be drawn as this for determining the length:
As can be seen the C.L. lengths are significantly different, a difference of 10.75" this is the result of the longer C.L. compared to the shorter:
While the result of the longer path are not bad, it goes lower which is definitely not a bad thing however as you might expect diaphragm displacement also increases.
So which is the right center line length to use? and is there anything else that might be wrong with this model.
Thanks in advance
The folding was the most challenging, in fact the input data shown above is from the drawing after attempting to fold it and not what was initially inputted into HR, however the results are close enough and seems satisfactory to what I want, which is extension down to about 35hz. As shown below the drawing follows a folding scheme similar to the THAM 15, this form factor seems best for my placement of the sub.
notice the center line at the corners is this correct or should it be drawn as this for determining the length:
As can be seen the C.L. lengths are significantly different, a difference of 10.75" this is the result of the longer C.L. compared to the shorter:
While the result of the longer path are not bad, it goes lower which is definitely not a bad thing however as you might expect diaphragm displacement also increases.
So which is the right center line length to use? and is there anything else that might be wrong with this model.
Thanks in advance
Hi radal,
Here is a great thread that answers your questions, take a look @ Post #202 by soho54:
http://www.diyaudio.com/forums/subwoofers/175658-tham15-compact-15-tapped-horn-21.html#post2451737
Regards,
Here is a great thread that answers your questions, take a look @ Post #202 by soho54:
http://www.diyaudio.com/forums/subwoofers/175658-tham15-compact-15-tapped-horn-21.html#post2451737
Regards,
Thanks tb46, I just glanced over that tread but I'll do a more in depth reading on that.
From what I've realized is that for the corners where you would equally divide the path into segments before rotating them is that the less segments you use the longer the path length becomes for example my drawing shows four segments rotated at 22.5 degrees however if I used three segments rotated at 30 degrees the path length becomes longer.
I am just guessing that the more segments you use for making your corners the more accurate your center line path length becomes?
From what I've realized is that for the corners where you would equally divide the path into segments before rotating them is that the less segments you use the longer the path length becomes for example my drawing shows four segments rotated at 22.5 degrees however if I used three segments rotated at 30 degrees the path length becomes longer.
I am just guessing that the more segments you use for making your corners the more accurate your center line path length becomes?
Hi radal,
There is a lot of stuff in the previously linked thread, here is another link that pertain specifically to how to measure around the bends:
Horn Folding - a brief study of the centerline vs advanced centerline method - AVS Forum | Home Theater Discussions And Reviews
Regards,
There is a lot of stuff in the previously linked thread, here is another link that pertain specifically to how to measure around the bends:
Horn Folding - a brief study of the centerline vs advanced centerline method - AVS Forum | Home Theater Discussions And Reviews
Regards,
There is a nifty Excel sheet for the tham like folding, where you can input your data it will plot out a build graph. It's made by Brain Steele so all credits to his (excel)lent work 😉
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