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A good tweeter to match 5" SB Acoustics Magnesium Woofers

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  • Originally posted by DDF View Post
    Btw, super powerful sprinkling resistors and caps around and cheap. C across l creates zero, usually bigger c vs l for same product of the two increases Q, increase inductor L or add resistor to make zero less deep (the two methods don’t produce identical results which is a problem with pcd).
    Have you tried this in WinPCD? I added dcr for inductors in all traps and a resistor element option in the cap section of parallel layout traps. WinPCD emulates PCD in the filter sections available, only a single series trap after XO, but with a trap before XO, your circuit can be modeled since it has no main XO section use. Actually, your XO topology is rather unique, I don't think that I've seen anyone else do it this way. I like it.

    dlr
    WinPCD - Windows .NET Passive Crossover Designer

    Dave's Speaker Pages

    Comment


    • Originally posted by xmax View Post
      You guys made me use windows and learn Xsim to confirm what I am referring to, without the 10 ohm resistor "bypassing" the 23 uF cap,
      it is very similar to not having the 2 split coils/caps. Great design and thank you for clarifying the friendly transfer function on the tweeter.

      (If the resistor was not required in the transfer function, it could have basically been done with 2 caps and coils instead of 4,
      a good study in filter design)
      Xmax -
      XSIM runs fine on Ubuntu using Playonlinux utility. No need for Windows


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      • Originally posted by DDF View Post

        LOL, that's actually pretty funny. I was bored, sue me.

        Just seemed like the sort of stream-of-consciousness I get when I take Ambien. My friends told me they won't answer my phone calls after 10pm or they'll hear some crazy talk
        Last edited by augerpro; 01-16-2018, 11:20 PM.
        ~Brandon

        Soma Sonus
        DriverVault

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        • Originally posted by donradick View Post

          Xmax -
          XSIM runs fine on Ubuntu using Playonlinux utility. No need for Windows
          It also runs well-enough on OS X (and presumably Linux) using Wine. Hornresp, too.

          Comment


          • Originally posted by dlr View Post
            Have you tried this in WinPCD? I added dcr for inductors in all traps and a resistor element option in the cap section of parallel layout traps. WinPCD emulates PCD in the filter sections available, only a single series trap after XO, but with a trap before XO, your circuit can be modeled since it has no main XO section use. Actually, your XO topology is rather unique, I don't think that I've seen anyone else do it this way. I like it.

            dlr

            Once Xsim came out, I've stuck with that. Beyond Xsim's greater flexibility, I also didn't like the inaccuracy from the excel version of PCD since it doesn't account for inductor resistance in parallel traps. In one design, it over-predicted loss at 750Hz by 0.5 dB (inductor R was 0.29ohms, for 0.75mH). I'm sure finer gauge inductors would have had even more error. Good idea to improve that in WinPCD.

            Comment


            • Originally posted by humphreyblowdart View Post

              It also runs well-enough on OS X (and presumably Linux) using Wine. Hornresp, too.

              I bought a LG Gram laptop for CNC and BassBox, Xover Pro etc and I kind of like it...

              It looks like Xsim is pretty great software and will get you as far as any sim. Now I need to look into getting
              accurate models of drivers into it to play around with it more.
              Guess xmax's age.

              My guess: 15. His grammar is passable. His trolling is good.

              Comment


              • Xsim just has no off-axis capabilities which is a big part of my design process, and I believe xmax as well as I recall "power response is everything".

                As unintuitive as the UI of SoundEasy is, I'm not disappointed in it, it does everything I want and more all in one software package.
                "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
                exactly a Fc 3K for both drivers, anybody can do it." -Xmax

                Comment


                • Originally posted by dcibel View Post
                  Xsim just has no off-axis capabilities which is a big part of my design process, and I believe xmax as well as I recall "power response is everything".

                  As unintuitive as the UI of SoundEasy is, I'm not disappointed in it, it does everything I want and more all in one software package.

                  Xsim requires loading off axis each time you want to sim that axis. I asked Bill if he ever intended to add multiple curves for different observation points. He asked me for a family of on and off axis measures to use maybe a year ago, and I sent him a zip file but that was the end of the conversation. He must be happily enjoying retirement too much

                  xmax, what do you need to model for drivers? Isn't better to just measure them?

                  Comment


                  • I kinda think power response is the limit for accurate simulations, that's where the hard work comes in.

                    Guess xmax's age.

                    My guess: 15. His grammar is passable. His trolling is good.

                    Comment


                    • Originally posted by dcibel View Post
                      Xsim just has no off-axis capabilities which is a big part of my design process, and I believe xmax as well as I recall "power response is everything".

                      As unintuitive as the UI of SoundEasy is, I'm not disappointed in it, it does everything I want and more all in one software package.

                      Power response is kinda everything, otherwise I would not be laying down the insane cake for the Volt 3" domes, I tried getting it
                      right with all sorts of high end cone mids and it' not the same, that said the Volt mid is a handful to get right too, but I think I am there
                      with a combination passive and active filters they are starting to drop panties and give goose bumps.

                      Guess xmax's age.

                      My guess: 15. His grammar is passable. His trolling is good.

                      Comment


                      • Originally posted by xmax View Post
                        I kinda think power response is the limit for accurate simulations, that's where the hard work comes in.
                        You're not gonna get that from any driver modeler because the break up behaviour affects the off axis response so much. You'd need a FEM package similar to what driver designers use to even get close. You're better off taking off axis measurements.

                        Comment


                        • Originally posted by xmax View Post


                          Power response is kinda everything, otherwise I would not be laying down the insane cake for the Volt 3" domes, I tried getting it
                          right with all sorts of high end cone mids and it' not the same, that said the Volt mid is a handful to get right too, but I think I am there
                          with a combination passive and active filters they are starting to drop panties and give goose bumps.
                          That's quite the word salad you put together there. I haven't the energy to try and understand what you're on about this time, life's too short.

                          If we can come back to reality with our underwear on, have you tried the Scan 10F in your list of "all sorts of high end cone mids"?

                          ATC 3":
                          Click image for larger version

Name:	ATC-SM75-150S-offaxis-0-15-30-45-60.gif
Views:	1
Size:	15.2 KB
ID:	1361117


                          Scan 10F:
                          Click image for larger version

Name:	Scan-Speak-10F-4424G00-FR-offaxis-0-15-30-45-60.gif
Views:	1
Size:	14.5 KB
ID:	1361118
                          "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
                          exactly a Fc 3K for both drivers, anybody can do it." -Xmax

                          Comment


                          • Originally posted by DDF View Post

                            You're not gonna get that from any driver modeler because the break up behaviour affects the off axis response so much. You'd need a FEM package similar to what driver designers use to even get close. You're better off taking off axis measurements.
                            Once you implement a crossover that utilizes drivers in their passbands rather than breakup region, I think the power response generated by taking an average off-axis of many points is actually rather close to reality.
                            "I just use off the shelf textbook filters designed for a resistor of 8 ohms with
                            exactly a Fc 3K for both drivers, anybody can do it." -Xmax

                            Comment


                            • Originally posted by dcibel View Post

                              Once you implement a crossover that utilizes drivers in their passbands rather than breakup region, I think the power response generated by taking an average off-axis of many points is actually rather close to reality.
                              I've never seen a comparison of the a model of a driver's directivity (usually the model assumes a rigid piston and not a cone or dome) vs the actual directivity of a rigid driver before breakup, so I don' know how useful a model would be. Is there data in the public domain making some comparisons?

                              Comment


                              • Originally posted by dcibel View Post

                                That's quite the word salad you put together there. I haven't the energy to try and understand what you're on about this time, life's too short.

                                If we can come back to reality with our underwear on, have you tried the Scan 10F in your list of "all sorts of high end cone mids"?

                                ATC 3":
                                [ATTACH=CONFIG]n1361117[/ATTACH]

                                Scan 10F:
                                [ATTACH=CONFIG]n1361118[/ATTACH]

                                A scan glass fiber mid, not that one though, looks nice. The Volt is a whole different animal the wave guide is quite different
                                from the ATC. you would have to hear it.
                                Guess xmax's age.

                                My guess: 15. His grammar is passable. His trolling is good.

                                Comment

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