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» Termpro Audio Forum » Component Specific Topics » Subs and Enclosures » How do you calc. the Qtc for your sub?

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Author Topic: How do you calc. the Qtc for your sub?
sku
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Is this in WinISD somewhere? I have an RE HC 15 in
a 3.8 cu. ft. box, what's my system Qtc?

Thanks!

PS -- Read Qtc not Qts
Posts: 406 | From: Seattle, WA | Registered: Jul 2001  |  IP: Logged | Report this post to a Moderator
Tempe
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when you are on the box tab it says the qtc right there

tempe

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Posts: 14323 | From: Tempe, AZ | Registered: Jul 2001  |  IP: Logged | Report this post to a Moderator
sku
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That's what the problem was I had a ported box. So there
isn't a Qtc value for a ported box? How does this work then?
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Rybaudio
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No, you won't find a Qtc for a ported box. Qtc is a parameter associated with sealed boxes only.
Posts: 3961 | From: State College, PA | Registered: Sep 2000  |  IP: Logged | Report this post to a Moderator
guitar maestro
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quote:
Originally posted by Rybaudio:
No, you won't find a Qtc for a ported box. Qtc is a parameter associated with sealed boxes only.
the reason is because a sealed box is a single mass-spring damped system.........a ported system is a double mass-spring damped system which has two impedance peaks with a local minimum in between.......a sealed box has a single impedance peak which corresponds to resonance

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Rybaudio
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Can you please tell me how that relates to Qtc? I can easily see the relationship of that info to Fc, but how does Qtc fit in?
Posts: 3961 | From: State College, PA | Registered: Sep 2000  |  IP: Logged | Report this post to a Moderator
   

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