Here we go! Exactly what I was looking for. So you actually has changed the functionality of the stepped approach, or have I totally misunderstood both the manual (the version I have from May 2020) and the dialogue we have had about this topic???
🙂
Your Hornresp.dat data file appears to have been corrupted - notice how in Attachment 1 there are no record number details displayed.
Your Lec design works just fine for me, as shown in Attachment 2.
Attachments
Full stepped segment functionality was added to the Loudspeaker Wizard in Version 51.00.
CHANGE 1 in Post #11147 linked below refers:
https://www.diyaudio.com/forums/subwoofers/119854-hornresp-1115.html#post6354168
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I am working on an Nautilus shape subwoofer, both with finite element analysis and HornResp.
Nautilus Speaker - Finite element simulation
I have some doubts about understanding the results. Supposing a sealed subwoofer, I choosed:
Tools -> Chamber Type -> Rear Lined
A understood this is for sealed enclousure
Then looking into Power response, we have Output1, output 2 and Convined. I attach some ilustration.
Than you
Nautilus Speaker - Finite element simulation
I have some doubts about understanding the results. Supposing a sealed subwoofer, I choosed:
Tools -> Chamber Type -> Rear Lined
A understood this is for sealed enclousure
Then looking into Power response, we have Output1, output 2 and Convined. I attach some ilustration.
Than you
Attachments
I just realized that the pictured project is loaded and its only when I click next, does the error come, so project 20 out of 20 is corrupt...the only difference between now and yesterdays message is that I happened upon the "Sort" command.....My projects are now undesirably sorted but it moved the corrupt project to position 20 out of 20.....the MockAxi project shown in the picture loads...once again, only when I click next does the error appear....so I went to the editor and deleted it...
If I change the numbers I can re-sort my projects?
Attachments
In Hornresp you need to use the closed horn mouth (Clo) option.
Attachments
The only difference is that the BP6P model adds inner end corrections to the port tube lengths.
Not sure what you mean by changing the numbers. Suggest you do the following:
1. Create a new data file named Hornresp1.dat using the File > New menu.
2. Use the Data File Editor to copy records in the desired order from Hornresp.dat to Hornresp1.dat.
3. Close Hornresp.
4. Delete the Hornresp.dat file.
5. Rename Hornresp1.dat as Hornresp.dat
Can´t really say how much I appreciate the "Stepped approach" change to what it now is David. My very much sought for and by you many times commented as "will never happen" feature silently (although commented by you) implemented. Smiling ear to ear!! 😀😀😀😀😀😀
Hi Sharky,
Glad you like it 🙂.
(It was not easy to implement - having to add three more area sliders was a real pain).
Kind regards,
David
Glad you took the pain David 🙂
Now its a simple task to calculate the below design.
1)
The next step is the room (and the baffle) in combination with the cabinets driver and port.
In the program one can select the position of the cabinet for simulating the spl etc. Against a wall or in the middle of a floor are two of them. Somewhere in between, back side 0,2-0,5 m from the wall is the most common position for a speaker. Also a cabinet port can be positioned on the front, underneath or at the back.
The above wall distance and position of the port is not something that can be selected in the program here. If i proceed to another program (VituixCAD for example) they sometimes can compensate for room, position and baffle. But then I walk away from the horn design from Hornresp. Is there a good process of how to adjust the horn design by the use of both Hornresp and a program compensating for the room (, baffle) and port position without loosing the advantages of Hornresp (and the other porgram)?
2)
What is your best suggestion of hos to get a more detailed, zoomed in, spl curve of a critical area? An output to for example Excel would ease the process, but that might be other ways that you guys use.
Now its a simple task to calculate the below design.
1)
The next step is the room (and the baffle) in combination with the cabinets driver and port.
In the program one can select the position of the cabinet for simulating the spl etc. Against a wall or in the middle of a floor are two of them. Somewhere in between, back side 0,2-0,5 m from the wall is the most common position for a speaker. Also a cabinet port can be positioned on the front, underneath or at the back.
The above wall distance and position of the port is not something that can be selected in the program here. If i proceed to another program (VituixCAD for example) they sometimes can compensate for room, position and baffle. But then I walk away from the horn design from Hornresp. Is there a good process of how to adjust the horn design by the use of both Hornresp and a program compensating for the room (, baffle) and port position without loosing the advantages of Hornresp (and the other porgram)?
2)
What is your best suggestion of hos to get a more detailed, zoomed in, spl curve of a critical area? An output to for example Excel would ease the process, but that might be other ways that you guys use.
Attachments
Somehow. I'd like to have put the speaker on 1/3 on each segment, have segements tapered and opt. filling to prevent upper harmonics. That all to be able to have a 6db xo to the midrange enclosure.
I'm curious if a transmissionline bandpass would sound diffrent/better than a common helmholtz bandbass.
Going crazy again.
Turing back to a simple design and comparing an output from MathCAD and Hornresp and end up with two very different results. Have been going over it again and again without finding the error.
Enclosing the input and spl output from MathCAD and Hornresp.
Impedance curves, driver displacement etc are equally different.,
Turing back to a simple design and comparing an output from MathCAD and Hornresp and end up with two very different results. Have been going over it again and again without finding the error.
Enclosing the input and spl output from MathCAD and Hornresp.
Impedance curves, driver displacement etc are equally different.,
Folding while preserving sim results...can preserve volume, but not length
I doesn't appear to be enough to merely preserve volume while folding a horn into a cabinet in order to preserve the Hornresp sim results. Folding lengthens the horn. But it's impossible to know the ultimate length until the design is complete.
See the attached image for clarity. Given a horn profile defined by a sequence vertical dimensions at, say, 2cm intervals (cabinet width is constant), all four examples have the same area (& thus volume), however, the lengths are different if you use the advanced centerline method, which appears to connect the center points of each of the vertical "ribs" (?).
I can re-simulate with the new length and see what damage I've done to my beautiful Hornresp results, but iteratively changing the design is very time consuming. Is there a better way?
Many thanks!
I doesn't appear to be enough to merely preserve volume while folding a horn into a cabinet in order to preserve the Hornresp sim results. Folding lengthens the horn. But it's impossible to know the ultimate length until the design is complete.
See the attached image for clarity. Given a horn profile defined by a sequence vertical dimensions at, say, 2cm intervals (cabinet width is constant), all four examples have the same area (& thus volume), however, the lengths are different if you use the advanced centerline method, which appears to connect the center points of each of the vertical "ribs" (?).
I can re-simulate with the new length and see what damage I've done to my beautiful Hornresp results, but iteratively changing the design is very time consuming. Is there a better way?
Many thanks!
Attachments
You're welcome guy! The enclosure is going into my son's Volvo S60. I actually bought 8 of them.
Attachments
Hi Newracer! Do you have an idea what type of cabinet design you would like (high/shorts, wide/narrow etc), or what kind of horn you would like to have (single/double fold etc), where you would like the port to end etc?
I prepare an Excel based on the basic thoughts. When the Hornresp simulation dimensions come out I can adapt the cabinet to it. Or prepare the Excel for the opposite. If I make the “xyzvw” this long what happen to the dimensions in the Hornresp design etc.
If we start with the a cabinet design idea we can go further after that
Did find "Combined 1" today. But couldn´t find in the manual what the content is. Green line, yellow line and blue line....
Green line "Fundamental Fz" what is that versus the system tuning frequence?
Green line "Fundamental Fz" what is that versus the system tuning frequence?