Qts and seriese resistance

woody · 26th July 2007, 07:03 PM

I need the formulia to calculate the change in QTS caused by
adding seriese resistance. I had a link to an online program
that did this but have lost it.

thanks

Svante · 26th July 2007, 07:47 PM

Qes=2*pi*fs*Mms / (Bl^2/(Re+Rs))

Qts=1/(1/Qms+1/Qes)

Hope I got it right...

You don't need all the parameters, it is sufficient to realize that Qes increases by a factor (Rs+Re)/Re when Rs is connected.

dwferg · 26th July 2007, 07:52 PM

Try this link

http://www.lautsprechershop.de/tools..._closed_en.htm

Denis

woody · 26th July 2007, 08:17 PM

Thanks that helped a bunch.

26th July 2007, 07:03 PM	#1
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Qts and seriese resistance I need the formulia to calculate the change in QTS caused by adding seriese resistance. I had a link to an online program that did this but have lost it. thanks

26th July 2007, 07:47 PM	#2
Svante diyAudio Member Join Date: Feb 2004 Location: Stockholm	Qes=2pifs*Mms / (Bl^2/(Re+Rs)) Qts=1/(1/Qms+1/Qes) Hope I got it right... You don't need all the parameters, it is sufficient to realize that Qes increases by a factor (Rs+Re)/Re when Rs is connected. __________________ Simulate loudspeakers: Basta! Simulate the baffle step: The Edge

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26th July 2007, 07:52 PM	#3
dwferg diyAudio Member Join Date: Apr 2007	Try this link http://www.lautsprechershop.de/tools..._closed_en.htm Denis

26th July 2007, 08:17 PM	#4
woody diyAudio Member Join Date: Jan 2002 Location: Tyrone Ga. U.S.A.	Thanks that helped a bunch.