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What software for modelling vented boxes?

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  • #16
    Baby Driver

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    • #17
      Originally posted by a4eaudio View Post

      Definitely agree on measurement, lots of measurements are significantly different than manufacturers specs. On the other hand, trash the charts because the software is so good IF you give it good inputs.
      My T/S parameters for the WinISD sim above is based on the average of measurement for 4 drivers, except VAS which I used mfg specs. (I didn't even realize I wasn't using mfg specs until your post and I went to check. I must have measured these awhile ago because I didn't even remember that I had.)

      My measurements are below.

      Click image for larger version

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      Thanks for those measurements: some are about 10% out, which would make a difference when modelling.

      I've used the 830656 in two projects - a TM with the BC25TG and Ron's C Notes - and really like it, especially because you don't have to countersink it! Makes for less dust and swear word output.

      Geoff

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      • #18
        Originally posted by ontariomaximus View Post
        If someone could double check my simple calculation.
        A 34 litre box could be tuned to 50hz with a 3" round port 4.16" long?
        Did you download WinIsd? If doing all the work to build a box, please put some effort into the advice you are given. WinIsd will check the port Mach number for you.

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        • #19
          I think max's 4" long 3" id port will be spot on. 20w RMS into the mid 40s b4 xmax, F3 below 50, about 50 fps maxed out.
          I've got 2 datasets for the 830656 SDS (PE# 264-1078); an older set,
          and this one from 2015:

          Click image for larger version

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          • #20
            Originally posted by Chris Roemer View Post
            I think max's 4" long 3" id port will be spot on. 20w RMS into the mid 40s b4 xmax, F3 below 50, about 50 fps maxed out.
            I've got 2 datasets for the 830656 SDS (PE# 264-1078); an older set,
            and this one from 2015:

            Click image for larger version

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            THANKS - I just confirmed in WINISD and will go with 34litre tuned to 49hz (3" x 4.38" port)

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