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'Tandems'- an InDIYana 2018 theme driven build process...

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  • #31
    I told you it was difficult!
    Wolf
    "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
    "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
    "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
    "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

    *InDIYana event website*

    Photobucket pages:
    http://photobucket.com/Wolf-Speakers_and_more

    My blog/writeups/thoughts here at PE:
    http://techtalk.parts-express.com/blog.php?u=4102

    Comment


    • #32
      Sometimes it takes a sledge hammer!!!!

      Comment


      • #33
        Cool build Ben, the isobaric approach is an interesting variation from the norm. I always enjoy following your build threads and enjoy reading your crossover adjustments and logic through the process.
        Projects:

        transcenD: http://techtalk.parts-express.com/fo...5035-transcend
        Summits: http://techtalk.parts-express.com/sh...75-The-Summits
        References: http://techtalk.parts-express.com/sh...-My-References
        Vintage Style 2-way: http://techtalk.parts-express.com/sh...-vintage-2-way

        Comment


        • #34
          It will be interesting to see if the 15K dip is real, you might need a few more parts
          John H

          SLS-85, BMR-3L, Mini-TL, BR-2, Titan OB, B452, Udique, Vultus, Latus1, Seriatim, Aperivox,Pencil Tower

          Comment


          • #35
            Thanks Ben, given the price of the woofers, the XMAX, and the relatively higher sensitivity, ISO makes a lot of sense, not much to loose and plenty of benefits. Thanks for the sims.

            Comment


            • #36
              Lots of parts.
              Attached Files

              Comment


              • #37
                How many parts you end up with, rpb? I'm guessing you at least notched the woofer bump, but I can tell you did more than that.

                Now- how long did it take you to get there? I'm guessing 3-4 hours at least. I'm guessing I have 5-6 hours in measurements, adapting and simulating for both of the versions I did.

                Anybody else wanna try it? It's difficult, but it is fun!


                John- I doubt I'll fix that unless I don't like what I hear.


                As to FR measurements, I'm planning on driving the mid with say a sine wave at about 20 Hz while I measure the horn. This will hopefully yield an average of cone position for the mid, and see how it affects the horn's response. I know the sine wave will show up in the plot, but likely negligible. I also plan on a one-position method for the mid and horn to get time of flight phase for simulations.

                Later,
                Wolf
                "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                *InDIYana event website*

                Photobucket pages:
                http://photobucket.com/Wolf-Speakers_and_more

                My blog/writeups/thoughts here at PE:
                http://techtalk.parts-express.com/blog.php?u=4102

                Comment


                • #38
                  Originally posted by Wolf View Post
                  How many parts you end up with, rpb? I'm guessing you at least notched the woofer bump, but I can tell you did more than that.

                  Now- how long did it take you to get there? I'm guessing 3-4 hours at least. I'm guessing I have 5-6 hours in measurements, adapting and simulating for both of the versions I did.

                  Anybody else wanna try it? It's difficult, but it is fun!


                  John- I doubt I'll fix that unless I don't like what I hear.


                  As to FR measurements, I'm planning on driving the mid with say a sine wave at about 20 Hz while I measure the horn. This will hopefully yield an average of cone position for the mid, and see how it affects the horn's response. I know the sine wave will show up in the plot, but likely negligible. I also plan on a one-position method for the mid and horn to get time of flight phase for simulations.

                  Later,
                  Wolf
                  I spent about 2 hours initially, and had something about like what I posted, but I looked at total phase, and thought something was horribly wrong. I tried to fix it for a while, then decided that it was just the way it was going to be. By that point, I had changed most of the filter, and couldn't remember some of the values. So, after all that, about 3-4 hours. I'll get the part count tonight.

                  28 parts.
                  Last edited by rpb; 09-06-2017, 05:23 PM.

                  Comment


                  • #39
                    Originally posted by Wolf View Post
                    John- I doubt I'll fix that unless I don't like what I hear.

                    As to FR measurements, I'm planning on driving the mid with say a sine wave at about 20 Hz while I measure the horn. This will hopefully yield an average of cone position for the mid, and see how it affects the horn's response. I know the sine wave will show up in the plot, but likely negligible. I also plan on a one-position method for the mid and horn to get time of flight phase for simulations.

                    Later,
                    Wolf
                    The dip might be the case of on-axis cancelation, where off axis the dip fills in. wrt the 20 Hz sine wave, the cone shape will have the most impact on the tw FR. At 20 Hz the cone may flex more than realistic. Could use a battery and move the cone to max in or max out positions.
                    John H

                    SLS-85, BMR-3L, Mini-TL, BR-2, Titan OB, B452, Udique, Vultus, Latus1, Seriatim, Aperivox,Pencil Tower

                    Comment


                    • #40
                      This would be more fun if the notch would not have been included in the FRDs

                      John H

                      SLS-85, BMR-3L, Mini-TL, BR-2, Titan OB, B452, Udique, Vultus, Latus1, Seriatim, Aperivox,Pencil Tower

                      Comment


                      • #41
                        Originally posted by jhollander View Post

                        The dip might be the case of on-axis cancelation, where off axis the dip fills in. wrt the 20 Hz sine wave, the cone shape will have the most impact on the tw FR. At 20 Hz the cone may flex more than realistic. Could use a battery and move the cone to max in or max out positions.
                        Yes- I thought of doing that as well.
                        Wolf
                        "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                        "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                        "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                        "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                        *InDIYana event website*

                        Photobucket pages:
                        http://photobucket.com/Wolf-Speakers_and_more

                        My blog/writeups/thoughts here at PE:
                        http://techtalk.parts-express.com/blog.php?u=4102

                        Comment


                        • #42
                          More parts..... Guess how many! I'm just having some fun. This x-over would be ridiculously complex, and expensive. I just wanted to play a little. Not very amp friendly either.
                          Attached Files

                          Comment


                          • #43
                            Yikes! 2 ohms, huh?
                            How about- 36!
                            Wolf
                            "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                            "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                            "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                            "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                            *InDIYana event website*

                            Photobucket pages:
                            http://photobucket.com/Wolf-Speakers_and_more

                            My blog/writeups/thoughts here at PE:
                            http://techtalk.parts-express.com/blog.php?u=4102

                            Comment


                            • #44
                              Originally posted by Wolf View Post
                              Yikes! 2 ohms, huh?
                              How about- 36!
                              Wolf
                              That's a really good guess. If I counted right, and use the dcr on a coil, or two, I have 37.

                              Comment


                              • #45
                                This is what i got after playing around with it for a few hours, hopefully i set the drivers up correctly

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