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It’s that time audio enthusiasts! Registration for the 2019 Speaker Design Competition is now open! Visit midwestaudiofest.com for details and to list your speaker project. We are excited to see all returning participants, and look forward to meeting some new designers this year, as well! Be sure your plans include a visit to the Parts Express Tent Sale for the lowest prices of the year, and the Audio Swap Meet where you can buy and trade with other audio fans. We hope to see you this summer! Vivian and Jill
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What is more accurate? Vas or Mass Delta?

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  • What is more accurate? Vas or Mass Delta?

    When measuring a driver, what's the more accurate method in practice, not just in theory?

    I'm working with some smaller 3"-4" drivers and I wonder if my hand-waving estimates of driver displacement volume in this 1.5L box are enough to throw off a delta Vas measurement. Okay then, maybe I'll look at delta mass instead. But if I go that way, now I'm using a glob of blue putty and pocket change, which strike me as a fairly lossy thing to be attaching to the cone (not to mention my scale accuracy & precision).
    nothing can stop me now

  • #2
    Just do the parameter sweep and then use the published moving mass of the driver to calculate the rest if you're worried about blue putty and nickels.
    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio

    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51


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