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-   -   Determining Qts from Qes and Qms? (http://www.diyaudio.com/forums/full-range/199436-determining-qts-qes-qms.html)

Godzilla 28th October 2011 03:27 PM

Determining Qts from Qes and Qms?
 
I've been simming drivers on OB lately using XLbaffle. It was puzzling to me that the software doesn't ask for Qts rather determining it from Qes and Qms. I multiplied and divided these specs and still can't understand how Qes and Qms determine Qts... can someone offer and explanation?

Thanks!
Zilla

AndrewT 28th October 2011 03:30 PM

I think,
1/Qts = 1/Qes + 1/Qms

or restated:
Qts = 1 / [1/Qes +1/Qms]

it's the same arrangement of factors as in parallel resistances and in series capacitors.

dvisves 28th October 2011 03:36 PM

Qts = Qms * Qes / (Qms + Qes)


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