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Hornresp help

rjj45rjj45
in DIY

Team,
Several people have requested a Hornresp tutorial. Here is the first version. Feel free to point out errors or omissions.

But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
Tagged:
BilletSteve_Leetktran6thplanetScottS4thtry

Comments

  • Steve_LeeSteve_Lee

    WoW - That ^ doc is quite comprehensive, Sir!

    Thanks for putting it together.

  • 4thtry4thtry

    Thanks for the write-up, Don! I've been struggling with Hornresp and this paper clears up some of the problems I was having trying to get this program to create a stuffed ML-TL. In your ML-TL example, I noticed that when Hornresp created your ML-TL model, it was using a "Closed Mouth Horn Loudspeaker Wizard." So, that is why I could not add stuffing to my ML-TL models in Hornresp. I was trying to create an ML-TL using the wrong wizard. Look forward to your tapered TL simulation, when you have it ready. :+1:

  • rjj45rjj45

    @4thtry said:
    Thanks for the write-up, Don! I've been struggling with Hornresp and this paper clears up some of the problems I was having trying to get this program to create a stuffed ML-TL. In your ML-TL example, I noticed that when Hornresp created your ML-TL model, it was using a "Closed Mouth Horn Loudspeaker Wizard." So, that is why I could not add stuffing to my ML-TL models in Hornresp. I was trying to create an ML-TL using the wrong wizard. Look forward to your tapered TL simulation, when you have it ready. :+1:

    Thanks buddy.
    It took me a while, but I feel that that Input Wizard is the key way to start any project.
    Never had success trying to turn one model into another.
    I will send out the tapered TL update in a few days.
    Peace and Love!

    Eggguy4thtry
    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • rjj45rjj45

    V2 - added tapered TLs

    6thplanet
    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • rjj45rjj45

    I received a request to overlay or compare F3, F6, and F10.

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • 6thplanet6thplanet

    So I'm not getting the schematic layout like your tutorial? I only get the layout, none of the sliders and stuff?

  • 6thplanet6thplanet

    Also, do these driver parameters look like they are entered correctly? I used my measured Le and Re, not sure what Mmd is?

  • 6thplanet6thplanet

    Ok, I see the "Loudspeaker Wizard"
    I went straight to calculate, not to Tools first.

  • 6thplanet6thplanet

    I'm not sure about how (or if it will) model my box shape. Possible?

  • rjj45rjj45

    @6thplanet said:
    Ok, I see the "Loudspeaker Wizard"
    I went straight to calculate, not to Tools first.

    Yep, you end up doing a LOT of work in the wizard.

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • 6thplanet6thplanet

    So can it fo my enclosure? So far I only see having both top and bottom taper. Can I make the bottom line flat and the top angled? Is it always driver and port facing like the schematic is? Like can you send the driver/port to the top line?

  • rjj45rjj45

    Hornresp might be able to model your box shape, but what I suggest is to model a 2 segment tapered TL.
    You know what you want for VAS and Fb, shoot for a 10:1 or 8:1 ratio closed end to open end. Then you figure out folding the line. For your box, probably one fold will work.
    I wrote a short python program that would give me the cross section area (CSA) and tunnel "depth" for every centimeter of the length. From there, it was easy to fold the modeled line into my desired box.

    Don't worry a whole lot over some of the non-square angles in your box, unless it really messes with the line CSA somewhere.

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • rjj45rjj45

    Pretty sure MMD in Hornresp = MMS in T/S list

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • 6thplanet6thplanet

    I'm not doing an actual TL, MLTL is what I'm talking about. I'm just trying to predict the best port placement. The box shape and woofer location is set.

    rjj45
  • rjj45rjj45
    edited July 17

    ok - do you need help in setting the offset of the port? It's pretty obscure in the program.
    Or geometry? How long is your line compared to the height of your box?

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • 6thplanet6thplanet

    It's just a ported box. It gave me an option for 3 or 4 segments, I chose 3. I then entered S1 as the bottom, S2 as the wide point (unfortunately it defaults the woofer there) , S3 I made Auto, S4 is the top. S23 moves the port. I can't move the woofer because it moves the wide point of my enclosure.

  • Ed_PerkinsEd_Perkins

    @rjj45 said:
    Pretty sure MMD in Hornresp = MMS in T/S list

    MMd is the total moving mass of the speaker while MMs is MMd plus the mass of the air in front of the cone. The relationship formula is

    Mmd = Mms - (8/3)rhoRd^3 = Mms - 0.0032667* Rd^3

    where rho = density of air = = 0.001225 g/cm3 and Rd = effective piston radius in cm

    If you're a DATS user you can use the above formula with your driver's published MMs to determine MMd. Then you can use the DATS "Specified M(md)" method to calculate Vas. No need to build a test box or add weight to the driver cone to reduce Fs.

    rjj45Steve_Lee
  • rjj45rjj45

    @6thplanet said:
    I'm not doing an actual TL, MLTL is what I'm talking about. I'm just trying to predict the best port placement. The box shape and woofer location is set.

    Please export the Hornresp record for this design and post it here (it will be a small text file)
    I'll see what I can do. Looks like you can make S2 long and S3 short(er), which will move the port down.

    But Chahly - Stahkist don't want speakers that look good, Stahkist wants speakers that sound good!
  • 6thplanet6thplanet

    T/S parameters

    I'll try to upload the file when I get home.

    rjj45Steve_Lee
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