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SB21SDC and W4-1720 ?.

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  • SB21SDC and W4-1720 ?.

    Hello,

    I am thinking of pairing the SB Acoustics SB21SDC-C000-4 with either the Tang Band W4-1720 or Dayton DSA135-8. Does anyone have the FRD and ZMA files for the SB or TB drivers?

    thanks
    jackyjoy

  • #2
    Usually what most guys (or gals) do, is take a screenshot ("PrtScr" key on a PC) of F/Z plots, then paste it into fprawn's "FPGraphTracer" and trace it, then save out your .frd/.zma files.

    Here are mine:

    W4-1720.fRD
    W4-1720.zma
    SB21SDC.FRD
    SB21SDC.ZMA

    Of course, with "traced" files, the phase data is either bogus or non-existant.
    Attached Files
    Last edited by Chris Roemer; 04-08-2021, 10:24 AM.

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    • #3
      Just a quick comment that the TB W4 1720 is an outstanding driver and IMO a much better choice than the Dayton, if the price doesn't concern you. I built a 5.5L two way using the 1720 and a Peerless XT25 SC90 crossed at 2200Hz and am very happy with it.

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      • #4
        Originally posted by Chris Roemer View Post
        Of course, with "traced" files, the phase data is either bogus or non-existant.
        Here's an excellent article by Paul Carmody on how to perform simulations using copied frd/zma files:

        https://www.sites.google.com/site/un...d-measurements

        As Chris noted you need to re-create the phase data. And as Paul states you also need to add the baffle step and diffraction for your particular cabinet.

        "Everything is nothing without a high sound quality." (Sure Electronics)

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