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Quick and Dirty Vas Measurement

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  • ani_101
    replied
    Thanks... so i don't have to build entire enclosures to determine the SPL for domes... how do i enter MMS in DATS? is it the "Specified M(md)" field in DATS?

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  • mzisserson
    replied
    Brilliant! Thanks Jeff. That is a great idea!
    Last edited by mzisserson; 09-15-2016, 07:45 PM. Reason: Removed "actually" because it is a great idea.

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  • Jeff B.
    started a topic Quick and Dirty Vas Measurement

    Quick and Dirty Vas Measurement

    Let me toss out a quick alternative method for calculating Vas than the Delta-Mass or Delta Compliance methods that are usually discussed. I have used this as a test, and sometimes just do this when i want a quick measurement. In many cases it may be closer to reality anyway.

    Suspension compliance can vary quite a bit from driver to driver, or even for a single driver that hasn't been broken in yet. But if the manufacturer lists the Mms of the driver, this is likely to be a pretty accurate number, and one that remains constant. With this being the case, simply enter it as the moving mass, along with the effective diameter and let DATS calculate the Vas from this data. Since the manufacturer probably knows the real moving mass, the result may be pretty reliable.

    Jeff B.
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