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  • Stupid question time ---- can i use anything in this to...

    STUPID QUESTION TIME ---- CAN I USE ANYTHING IN THIS image to get enough infomation to put it into WiniSD???
    Attached Files

  • #2
    Doubtful. If you're trying to model a box you need the T/S parameters.
    Francis

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    • 3rutu5
      3rutu5 commented
      Editing a comment
      I thought that was the response, I was hoping somebody was telling me I missed something

  • #3
    You could compare it to the spec sheets for the Tymphany line in hopes of identifying the driver and obtaining the T/S specs. Knowing the Fs is approximately 150Hz narrows the search.
    www.billfitzmaurice.com
    www.billfitzmaurice.info/forum

    Comment


    • #4
      Originally posted by billfitzmaurice View Post
      You could compare it to the spec sheets for the Tymphany line in hopes of identifying the driver and obtaining the T/S specs. Knowing the Fs is approximately 150Hz narrows the search.
      I can see the 8ohm version of the driver, of the same driver, having a back and forward with peerless and it has even got to contacting some australian suppliers which they appear to buy direct from PE lol.

      Either way I know the driver, just a bit disappointed OEM products don't seem to have anything, but guess they aren't meant to be sold in small batches

      Comment


      • Geoff Millar
        Geoff Millar commented
        Editing a comment
        It looks like it may be one of the Vifa TC full range series, but I don't know which one. You can use fptrace to create FRD and ZMA files from the graph but that won't help for WIN ISD.

        Geoff

      • 3rutu5
        3rutu5 commented
        Editing a comment
        It's probably the wrong graph to be honest, I requested some information through the grey seller. I got the 8ohm version information from the loudspeaker database, worse case I'll use it and close my eyes

      • jim85iroc
        jim85iroc commented
        Editing a comment
        Sounds like it's time to either get your own test equipment, or ship it off to someone else who's got some and is willing to help.

    • #5
      Actually (if it IS the correct plot) you can FPTrace the Z-curve, open your DATS (other softwares might work as well) and import that Z-data. DATS then makes its best guess as to the T/S parms. It's got NO way to estimate Vas, but will give you enough data to enter into ISD to tell you how LOW it could play w/different alignments.

      Re = 4.28
      Fs = 146
      (Qts = 0.57)
      Qes = 0.712
      Qms = 2.83
      Le = 0.28mH (@ 1kHz)

      I guessed at a Vas of 0.01cf, an Sd of 15sqcm (like other Peerless 2"ers), and a Pe of 15w.

      SEEMs like in 0.04cf w/a 3/4"id x 3" long port tube, it'll probably do about 80Hz. (That gives you roughly a tuning near 90.)

      The rolloff shoulder will be fairly close (the rolloff plot, and F3), w/your largest err being the box volume. If your Vas guess really should have been twice as large, then you'd have to double your box volume (proportionately) to match your model.

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      • #6

        I bumped Johnny Richards' thread discussing his simple inexpensive self-contained Limp jig.

        Three,
        You seem to be putting a lot more time and effort into avoiding testing than would be required to do the testing.
        "Our Nation’s interests are best served by fostering a peaceful global system comprised
        of interdependent networks of trade, finance, information, law, people and governance."
        - from the October 2007 U.S. Naval capstone doctrine
        A Cooperative Strategy for 21st Century Seapower
        (a lofty notion since removed in the March 2015 revision)

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