programs for designing 3-way x-overs

Discussion in 'Archived Threads 2001-2004' started by Billy Posey, Jul 18, 2001.

  1. Billy Posey

    Billy Posey Second Unit

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    I can't seem to find any programs online to help design or figure out a 3-way crossover. Can anyone help.?
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  2. ThomasW

    ThomasW Cinematographer

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    Correct crossover design involves the following, and cannot be properly done with an online program.
    1)having the knowledge to chose the drivers
    2)mounting the drivers in a test baffle
    3)measuring the drivers performance in the baffle
    4)taking the measurements and inputing that info into the crossover design progam.
    5)adjusting the software model for best simulated performance
    6)gathering the correct values of components for the crossover
    7))building the 1st of many versions and measuring the performance of the drivers in the baffle with the XO.
    8)having a supply of spare caps, inductors and non-inductive wire wound power resistors to make both large and small changes in the crossovers component values
    9)refining the design with a combination of measurement and listening tests.
    10)LAST and MOST IMPORTANT listening to Siegfried Linkwitz when he says "DO NOT BUILD SERIES CROSSOVERS" [​IMG]
    One of the easiest programs to use is X-Over Pro fromhttp://www.ht-audio.com/ You will also need a speaker modeling program. BassBox Pro is a good, easy to use program.
    A more powerful but less intuitive program is LspCAD http://www.ijdata.com. It contains both a speaker design, and crossover design elements.
    Also I strongly recommend that for your first project you build a 2-way system.....
    [Edited last by ThomasW on July 18, 2001 at 11:42 PM]
     
  3. Patrick Sun

    Patrick Sun Studio Mogul

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    Thomas, what's SL's objection to series XOs? Seems to me, they are really only an option if you are using drivers with extremely well behaved roll-offs (and for most affordable midwoofers, that's not an option). [​IMG]
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  4. ThomasW

    ThomasW Cinematographer

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    Patrick
    In a perfect world, where the drivers are perfect etc, etc, series XO would work. But.........
    Check the archives at MAD for SL's reply to the thread on series XO for a detailed answer. Or just send him an email. I'm sure he'd be happy burst the bubble that's been created by the people at MAD that chose ignore reality.
    Everyone
    Anyone that want's to understand speaker design theory MUST take a long hard look at Siegfried Linkwitz's website. It's a crash course in theory, design, and how to build, by one of the world foremost authorities. Start here http://www.linkwitzlab.com/page_index.htm
    [Edited last by ThomasW on July 19, 2001 at 10:39 AM]
     

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