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ZAPH Hi-Vi B3S single driver system construction plan completed

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  • #16
    Originally posted by Wolf View Post
    HiVi TN25, M4N? Can you get those?


    Later,
    Wolf
    Can buy M4N,B4N,M5N,M6N, TN25, TA26, TN25III-P, T20-5-01,SS1II ,X1II , k1, SD1.1-A
    Dayton CE32A-4,Dayton ND16FA-6 ,Dayton ND25FA-4,Dayton ND20FB-4,
    VIFA DX25TG05-04,VIFA XT25TG30-04,VIFA DX25TG09-04,

    Click image for larger version  Name:	0001.png Views:	0 Size:	136.4 KB ID:	1430070
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    This design also looks good. Is there any detailed information? Thank you.
    Last edited by 9sheng; 01-23-2020, 09:12 AM.

    Comment


    • #17
      Info on my Sophomores below. "The best $100 speakers I've ever heard." -Dirk

      The xover values were measured parts that are in the circuit. Get as close as you can. The 0.1 ohm and 0.3 ohm resistors are DCR of the coils in the tweeter circuit, and not actual resistors.

      At the time I built these, the TN25 was one of the few small-format cheap tweeters without too many anomalies in the response that could xover about 3kHz. This changes the image and tonal balance to be much different than a 0.75" tweeter at 4kHz.

      Click image for larger version

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      The design was made optimizing position on the baffle as well as baffle edge treatments to get the best response of the drivers used. Then the xover was modeled. The sharp or rounded edges are important, as are the position/placement of the drivers on the baffle. The top and bottom halves of the cabinet are visual inversions whether sharp or round. The tweeter is flush-mounted, and the woofer is surface mounted in my version. Others have flush mounted the woofer without issues. All roundovers in mine are 0.75" radius, but others have been made with 0.5" radii. Material is 0.75" MDF, painted. Port is 1.5" diameter x 4.5" long from inside end to baffle surface of outer flare. Boxes have 6.25 oz of polyfil stuffing inside- This is not a typo.
      Xover boards were made into to sections. The woofer board lies on the side wall behind the name-badge, and the tweeter board was slid against the inside top atop the port. There really are not better positions.

      Click image for larger version

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      Box model below. The stuffing lowers the large rise just above 100Hz, and the ported design as a must to get any extension below 100Hz. The M4N has a high Qts, and while sealed would be the norm, vented and stuffed results were much better.

      Click image for larger version

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      Modeled FR:

      Click image for larger version

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      And a measured impedance:

      Click image for larger version

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      This is to illustrate that the stuffing does not quite suppress the peaking completely as modeled. I still don't know why the difference of measured vs. modeled exists above 3.5kHz, but the sound is right.

      Let me know if you require any more info. These have been loved by many over the years.

      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


      • #18
        And a photo of LeroyR's build:

        Click image for larger version

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        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


        • #19
          Originally posted by Wolf View Post
          Info on my Sophomores below. "The best $100 speakers I've ever heard." -Dirk
          Later,
          Wolf
          Thanks for the information, I really like your design. I have found a lot of relevant information through the Internet.

          https://web.archive.org/web/20120101.../blog.php?b=73
          https://s18.photobucket.com/user/wol...library?page=1

          Comment


          • #20
            Thanks for the archive link. I've been looking to restore the entry for those, but couldn't find it in there.
            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

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